tag:blogger.com,1999:blog-34139282698582452652024-02-26T07:18:09.261-03:00Circuitos Eletrônicos.Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.comBlogger129125tag:blogger.com,1999:blog-3413928269858245265.post-15556145416493182332012-02-07T03:21:00.000-02:002012-02-07T03:21:00.501-02:00CIRCUITO DE SIRENE SIMPLES<span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span class="" style="line-height: 18px;">Este circuito gera um tom que soa muito semelhante a uma sirene. </span><span style="line-height: 18px;">A parte do circuito gerador é feita da combinação de transistores PNP e NPN. </span><span style="line-height: 18px;">Toghether, os dois transistores de construir um multivibrador runing livre. </span><span class="" style="line-height: 18px;">Se o capacitor C2 foi conectado à linha positiva da fonte de alimentação, ele teria funcionado como um oscilador de freqüência constante.</span> </span></span><br />
<span class="" style="background-color: white; font-family: Verdana, sans-serif; line-height: 18px;"><span class="">No entanto, nós não queremos um oscilador de freqüência constante. </span>Queremos uma sirene. Então, para gerar um cima e para baixo vai tom de sinal, o resistor R2 é alimentado a partir de um circuito RC. Quando o interruptor S1 é pressionado, o capacitor carrega através de R1 C1 lentamente até atingir o nível de tensão máxima de 4 volts. Este aumento resulta da tensão a uma diminuição do tempo constante na junção R2/C2. Este, além disso, os resultados a um aumento da freqüência do multivibrador.</span><br />
<br />
<span class="" style="background-color: white; font-family: Verdana, sans-serif; line-height: 18px;">Depois que o S1 é liberada, o capacitor descarrega C1 lentamente, resultando em um ciclo de frequências decrescentes. Através da combinação das duas constantes de tempo uma forma de onda dente de serra é gerado.<br />
O sinal de ouvido de alto-falante será um tom de aumentar ou diminuir dependendo se o interruptor S1 é pressionado ou liberado.</span><br />
<h2 style="font-weight: normal; margin-bottom: 10px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif; line-height: 18px;">Diagrama do circuito da sirene</span></h2><span class="" style="background-color: white; font-family: Verdana, sans-serif; line-height: 18px;"><img src="http://electroschematics.com/wp-content/uploads/2009/01/siren.gif" /> </span><br />
<h3 style="font-weight: normal; margin-bottom: 10px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif; line-height: 18px;">Layout PCB Siren</span></h3><span class="" style="background-color: white; font-family: Verdana, sans-serif; line-height: 18px;"><img src="http://electroschematics.com/wp-content/uploads/2009/01/siren-pcb.gif" /> </span><br />
<span class="" style="background-color: white; font-family: Verdana, sans-serif; line-height: 18px;">Fonte:<a href="http://electroschematics.com/935/simple-siren/">http://electroschematics.com/935/simple-siren/</a></span>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com1tag:blogger.com,1999:blog-3413928269858245265.post-38592118904696766222012-02-02T03:20:00.000-02:002012-02-02T03:20:00.821-02:00Esquema de intercomunicador<div style="line-height: 18px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span class="">Neste esquema de intercomunicação, a 8 alto-falantes ohm é usado como microfone e altifalante de escuta. </span><br />
<span class="">10K O potenciómetro de volume e controla o ganho total pode ser definido com 5k de R. Use um interruptor duplo com 2 posições para quando se é usado para falar e outra para ouvir. </span>A mudança vai ser na casa.</span></span></div><h2 style="font-weight: normal; line-height: 18px; margin-bottom: 10px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; font-size: small;">Intercom diagrama de circuito</span></h2><div style="line-height: 18px;"><a href="http://electroschematics.com/wp-content/uploads/2008/04/intercom.gif" style="outline-color: initial; outline-style: none; outline-width: initial; text-decoration: none;" title="intercom diagrama de circuito"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img alt="interfone" class="aligncenter size-full wp-image-2487" height="312" pxz:uid="1230aa5fdf9-1" src="http://electroschematics.com/wp-content/uploads/2008/04/intercom.gif" style="border-bottom-style: none; border-color: initial; border-image: initial; border-left-style: none; border-right-style: none; border-top-style: none; border-width: initial; display: block; margin-left: auto; margin-right: auto; max-width: 100%; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" width="360" /></span></a></div><div style="line-height: 18px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Fonte:<a href="http://electroschematics.com/8/intercom-circuit-intercom-schematic/">http://electroschematics.com/8/intercom-circuit-intercom-schematic/</a></span></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-27691961876547563082012-01-31T20:06:00.000-02:002012-01-31T20:06:00.220-02:00Esquema de equalizador com 6 banda de frequência<span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"> <img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjHveo11Nigbu2Sp7MJvR2rJBwsYqFl0UcETT72m-HFBI1AOP15WjXcS3DxG2v-zJmerZf1LWE8TJVehT8PNQX1J_8_7-vd_3Kk0pkIKuYgkpTJwn9SIAo4W5llBDHB-t28FzwMonJqabI/s1600/Equalizador-gr%25C3%25A1fico.gif" /></span></span><br />
<span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="line-height: 18px;">Esse Circuito Equalizador Gráfico de Áudio com 6 Canais de alta qualidade e de baixo ruído, é baseado em circuitos integrados monolítico TL074. O Equalizador é muito fácil de construir e tem uma boa qualidade de som. A Tensão máxima é 20VCC e não deve ser excedida e a tensão de operação é de cerca de 5 a 15V.<br />
<span id="ecxmore-3721"></span><br />
Componentes:</span><span style="line-height: 18px;"></span></span></span><br />
<div style="line-height: 18px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">IC1 = TL074-2<br />
C1 = 1uF 100V<br />
C2 = 15nF 100V<br />
C3 = 150nF 100V<br />
C4 = 33nF 100V<br />
C5 = 8.2nF 100V<br />
C6 = 1nF 100V<br />
C7 = 470pF 100V<br />
C8 = 680nF 100V<br />
C9 = 680nF 100V<br />
C10 = 150nF 100V<br />
C11 = 39nF 100V<br />
C12 = 8.2nF 100V<br />
C13 = 2.2nF 100V<br />
C14 = 470nF 100V<br />
R1 = 47kohms<br />
R2-5-18 = 150Kohms<br />
R3-4 = 10Kohms<br />
R6 … 0,17 = 10Kohms<br />
R19 = 100Kohms<br />
RV1 … .. 6 = 100Kohms Lin.</span></span></div><div style="line-height: 18px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><br />
</span></span></div><div style="line-height: 18px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><br />
</span></span></div><div style="line-height: 18px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><br />
</span></span></div><div style="line-height: 18px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Fonte:</span></span><a href="http://zeueletronica.blogspot.com/">http://zeueletronica.blogspot.com/</a></div><span style="background-color: white; line-height: 18px;"><span style="font-family: Verdana, sans-serif;">http://www.eletronica.com/</span></span>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-60260453790614993952012-01-26T04:49:00.001-02:002012-01-26T13:20:54.051-02:00Esquema\Circuito de Timer Digital<div style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"></div><span style="font-family: Verdana, sans-serif;">O Circuito apresentado pode Ligar ou desligar cargas depois de um intervalo de tempo entre 1 minuto e 10 horas.<br />
Quando a chave CH1 estiver na posição A, a carga estará ligada diretamente a rede e o timer não funcionará. Na posição B, o timer será acionado com um toque momentâneo em S1 (power). Com o acionamento, os Flip-Flops J-K (CI3) estarão resetados e o rele K1 vai travar a alimentação do circuito.<br />
Com o Flip-Flop JK1 (CI3) resetado e o LED aceso, aparecerá no display a indicação 9:59 e os dois LEDs indicadores de segundos estarão acesos (pode aparecer, devido a carga dos capacitores C7, C8 e C9 o valor 8:48 nos displays, mas este estado inicial é irrelevante, porque é o estado de carregamento, ou seja, de ajuste do tempo e o clock estará inativo).<br />
Neste estado deve ser realizado o ajuste do tempo de ativação: horas, dezenas e unidades de minutos por meio de S3, S4 e S5. Após o ajuste, o push-button S2 (controle - Load Counting) deverá ser pressionado. Desta forma o LED2 (contagem) acenderá e o LED, apagará. Os dois LEDs indicadores de segundos vão começar a piscar dando início à temporização decrescente. Os dois LEDs indicadores de segundos piscam numa freqüência de aproximadamente 1 Hz (60/64 Hz), mas esta freqüência não está associada à freqüência de clock. Tem apenas efeito decorativo e de indicação.<br />
Na contagem, as chaves S3, S4 e S5 não atuam.<br />
Os diodos D12 a D23 ligados nas saídas dos contadores 4029 funcionam como uma porta OU de 12 entradas. Assim, quando houver a contagem, no valor 0:00 será produzido um pulso que desativará o relê K1, desligando o próprio timer.<br />
No estado LOADING a carga não estará ligada. Isso só ocorre a partir do momento em que começar a contagem (LED2 aceso). O transistor Q14 comuta 60 vezes por segundo o que é imperceptível e isso proporciona menor consumo dos displays.</span><br />
<div class="separator" style="clear: both; text-align: center;"></div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNm2mQZYRr6aomxG50uHy-P2afJTbHlHruQ25ga7yJ55RuRRzEQYBqtSgalRXGoQXcoca8iSzCgcs8Ohz5T-b4gmq52yjx0ZkRWiWdRgKub5UsCTAx5kKk88BtciQQGth3TymH7gsjNkg/s1600/timedigitalautomatico.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em; text-align: center;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNm2mQZYRr6aomxG50uHy-P2afJTbHlHruQ25ga7yJ55RuRRzEQYBqtSgalRXGoQXcoca8iSzCgcs8Ohz5T-b4gmq52yjx0ZkRWiWdRgKub5UsCTAx5kKk88BtciQQGth3TymH7gsjNkg/s640/timedigitalautomatico.gif" width="460" /></a> <span style="font-family: Verdana, sans-serif;"><br />
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</span></div><div style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGF-MMkgYI9C7P_mkhY3Z6_O3rv61n0soP_S7S5WlxoboP768wumlc3Q-l2KqSM_0HDN58sH9xzuBrGifPD5J_EzD93SvXDQuVQ-fc_dxbM4dEsJ1Q_egKvGpy4aiotJNU66X7dfMSVLE/s1600/listatimer.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGF-MMkgYI9C7P_mkhY3Z6_O3rv61n0soP_S7S5WlxoboP768wumlc3Q-l2KqSM_0HDN58sH9xzuBrGifPD5J_EzD93SvXDQuVQ-fc_dxbM4dEsJ1Q_egKvGpy4aiotJNU66X7dfMSVLE/s1600/listatimer.gif" /></a></div> <span style="font-family: Verdana, sans-serif;"><br />
Autor:CARLOS ALBERTO S. CUNHA - Jaboatão ¦ PE</span></div><div style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><br />
</span></div><div style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Fonte:<a href="http://www.eletronicafacil.hdfree.com.br/Circuitos/Timerdigitalautomatico/timer.htm" style="background-color: transparent;">http://www.eletronicafacil.hdfree.com.br/Circuitos/Timerdigitalautomatico/timer.htm</a></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-54773972312446622502012-01-26T02:43:00.000-02:002012-01-26T01:23:00.022-02:00Circuito de campainha polifônicos<span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="line-height: 18px;"><span class="">O circuito usa o popular </span></span><strong style="line-height: 18px;"><span class="">gerador de melodia UM3481 IC</span></strong><span style="line-height: 18px;"><span class=""> . </span>Que gera tons de música como Jingle bell, Papai Noel está chegando, Noite silenciosa, noite santa, Joy para o mundo, Rudolph, a rena com nariz vermelho, Feliz Natal, O Come, All Ye Faithful, Hark eo anjo arauto cantar. </span><strong style="line-height: 18px;">UM 3482</strong><span style="line-height: 18px;"> gera 12 tons musicais. Capacitor C1 e R2 resistor são os componentes de oscilação. Pin1 pode ser desencadeada tanto por corrente contínua ou alternada. Aqui baixa tensão AC é aplicada ao pino de disparo de 1 a R1 e D1. <span class="">O circuito funciona com duas pilhas caneta que duram mais de um ano</span></span></span></span><br />
<div style="line-height: 18px;"></div><div style="line-height: 18px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><strong><span class="">Atenção:</span></strong><span class=""> O circuito está conectado à alta volt AC. </span>Não toque em nenhuma parte quando ela estiver ligada para evitar choque letal.</span></span></div><div style="line-height: 18px;"><span style="background-color: white; font-family: Verdana, sans-serif;"><br />
</span></div><div style="line-height: 18px;"><span style="background-color: white; font-family: Verdana, sans-serif;"></span></div><span style="background-color: white; font-family: Verdana, sans-serif;"><a href="http://electroschematics.com/wp-content/uploads/2010/02/polyphonic-door-bell.png" style="outline-color: initial; outline-style: none; outline-width: initial; text-decoration: none;"><img alt="" class="aligncenter size-full wp-image-5039" height="393" pxz:uid="1230ab3bf3e-1" src="http://electroschematics.com/wp-content/uploads/2010/02/polyphonic-door-bell.png" style="border-bottom-style: none; border-color: initial; border-image: initial; border-left-style: none; border-right-style: none; border-top-style: none; border-width: initial; display: block; margin-left: auto; margin-right: auto; max-width: 100%; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" width="567" /></a><br />
<a href="http://electroschematics.com/wp-content/uploads/2010/02/UM-34812.pdf" style="outline-color: initial; outline-style: none; outline-width: initial; text-decoration: none;">UM 3481</a></span><br />
<h3 style="font-weight: normal; margin-bottom: 10px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif;">AC187 Pinout</span></h3><span style="background-color: white; font-family: Verdana, sans-serif;"><a href="http://electroschematics.com/wp-content/uploads/2010/02/AC-187.jpg" style="outline-color: initial; outline-style: none; outline-width: initial; text-decoration: none;"><img alt="" class="aligncenter size-full wp-image-5033" height="138" pxz:uid="1230ab3bf3d-2" src="http://electroschematics.com/wp-content/uploads/2010/02/AC-187.jpg" style="border-bottom-style: none; border-color: initial; border-image: initial; border-left-style: none; border-right-style: none; border-top-style: none; border-width: initial; display: block; margin-left: auto; margin-right: auto; max-width: 100%; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" width="200" /></a></span><br />
<span style="background-color: white; font-family: Verdana, sans-serif;">Fonte:<a href="http://electroschematics.com/5031/polyphonic-doorbell/">http://electroschematics.com/5031/polyphonic-doorbell/</a></span>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com1tag:blogger.com,1999:blog-3413928269858245265.post-59402084279638811592012-01-09T02:10:00.000-02:002012-01-09T02:10:01.495-02:00Esquema de Amplificador 2W<br />
<center style="background-color: white;"><center><class="msonormal" align="center"><span style="font-family: Verdana, sans-serif;"><center><table border="0" bordercolor="#111111" cellpadding="0" cellspacing="0" id="AutoNumber2" style="border-collapse: collapse;"><caption> </caption><tbody>
<tr><td width="100%"><align="center"><class="msonormal" align="center" style="text-align: center;"> - Projetado para alto-falantes auto-alimentado 8, 4 e 2 Ohm</class="msonormal"></align="center"></td></tr>
<tr><td width="100%"><align="center"><align="center"><class="msonormal" align="center" style="text-align: center;"> - Interruptor de baixo-boost</class="msonormal"></align="center"></align="center"></td></tr>
</tbody></table>
<br />
<div align="center">
</div>
</center><br /><b>Diagrama de circuito:</b><br /><br />
<center><img alt="Amplificador de 2 Watt" border="0" height="303" src="http://iq-technologies.net/projects/audio/003/Ampbox.GIF" width="433" /></center><br /><br /><b>Partes:</b><br />
<table border="0" bordercolor="#111111" cellpadding="0" cellspacing="0" id="AutoNumber1" style="border-collapse: collapse;"><tbody>
<tr><td style="border-top-style: solid; border-top-width: 1px;" width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">P1<align="center"><class="msonormal" align="center"> = 10K</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td style="border-top-style: solid; border-top-width: 1px;" width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Log.Potentiometer</class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">R1, R2 = <align="center"><class="msonormal" align="center"><align="center"><class="msonormal" align="center">33K</class="msonormal"></align="center"></class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Resistores 1/4W</class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">R3 = <align="center"><class="msonormal" align="center">33R</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Resistor 1/4W</class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">R4 = <align="center"><class="msonormal" align="center">15K</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Resistor 1/4W</class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">R5, R6<align="center"><class="msonormal" align="center"> = 1K</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Resistores 1/4W</class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">R7 = <align="center"><class="msonormal" align="center">680R</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Resistor 1/4W</class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">R8 =<align="center"><class="msonormal" align="center"> 120R</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Resistor 1/2W</class="msonormal"></align="center"></td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px;" width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">R9 =<align="center"><class="msonormal" align="center"> 100R</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td style="border-bottom-style: solid; border-bottom-width: 1px;" width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">1/2W Trimmer Cermet</class="msonormal"></align="center"></td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="29%"> </td><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="71%"> </td></tr>
<tr><td style="border-top-style: solid; border-top-width: 1px;" width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;"><align="center"><class="msonormal" align="center">C1, C2<align="center"><class="msonormal" align="center"> = 10μF</class="msonormal"></align="center"></class="msonormal"></align="center"></class="msonormal"></align="center"></td><td style="border-top-style: solid; border-top-width: 1px;" width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;"><align="center"><class="msonormal" align="center">63V capacitores eletrolíticos</class="msonormal"></align="center"></class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">C3 = <align="center"><class="msonormal" align="center">100UF</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;"><align="center"><class="msonormal" align="center">Capacitor eletrolítico 25V</class="msonormal"></align="center"></class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">C4, C7 = <align="center"><class="msonormal" align="center">CAP 470UF</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;"><align="center"><class="msonormal" align="center">25V capacitores eletrolíticos</class="msonormal"></align="center"></class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">C5 = <align="center"><class="msonormal" align="center">47pF</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;"><align="center"><class="msonormal" align="center">Capacitor Cerâmico 63V</class="msonormal"></align="center"></class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">C6 = <align="center"><class="msonormal" align="center">220nF</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;"><align="center"><class="msonormal" align="center">Capacitor Poliéster 63V</class="msonormal"></align="center"></class="msonormal"></align="center"></td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px;" width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">C8<align="center"><class="msonormal" align="center"> = CAP 1000UF</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td style="border-bottom-style: solid; border-bottom-width: 1px;" width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;"><align="center"><class="msonormal" align="center">Capacitor eletrolítico 25V</class="msonormal"></align="center"></class="msonormal"></align="center"></td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="29%"> </td><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="71%"> </td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">D1 = <align="center"><class="msonormal" align="center">1N4148</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Diodo 75V 150mA</class="msonormal"></align="center"></td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="29%"> </td><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="71%"> </td></tr>
<tr><td style="border-top-style: solid; border-top-width: 1px;" width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">Q1 =<align="center"><class="msonormal" align="center"> BC560C</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td style="border-top-style: solid; border-top-width: 1px;" width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;"><align="center"><class="msonormal" align="center">45V 100mA PNP Transistor de baixo ruído de alto ganho</class="msonormal"></align="center"></class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">Q2 =<align="center"><class="msonormal" align="center"> BC337</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">45V 800mA NPN Transistor</class="msonormal"></align="center"></td></tr>
<tr><td width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">Q3 =<align="center"><class="msonormal" align="center"> TIP31A</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Transistor NPN 60V 4A</class="msonormal"></align="center"></td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px;" width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">Q4 =<align="center"><class="msonormal" align="center"> TIP32A</class="msonormal"></align="center"></class="msonormal"></align="center"></td><td style="border-bottom-style: solid; border-bottom-width: 1px;" width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">Transistor PNP 60V 4A</class="msonormal"></align="center"></td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="29%"> </td><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="71%"> </td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">SW1</class="msonormal"></align="center"></td><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">SPST chave</class="msonormal"></align="center"></td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="29%"> </td><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="71%"> </td></tr>
<tr><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="29%"><align="center"><class="msonormal" align="center" style="text-align: center;">SPKR</class="msonormal"></align="center"></td><td style="border-bottom-style: solid; border-bottom-width: 1px; border-top-style: solid; border-top-width: 1px;" width="71%"><align="center"><class="msonormal" align="center" style="text-align: center;">05/03 Altifalante Watt, 8, 4 ou 2 ohms de impedância</class="msonormal"></align="center"></td></tr>
</tbody></table>
</span></class="msonormal"></center></center><center style="background-color: white;"><center><br />
<b><span style="font-family: Verdana, sans-serif;">Finalidade do dispositivo:</span></b></center></center><blockquote style="background-color: white;">
<div align="left">
<span style="font-family: Verdana, sans-serif;">Este amplificador foi projetado para ser auto-contido em uma caixa de alto-falante pequeno. Pode ser alimentado por Walkman, Mini-Disc e CD players, computadores e aparelhos semelhantes com linha ou saída de fone de ouvido. É claro que, na maioria dos casos, você terá que fazer duas caixas de obter estéreo.<br />O circuito foi deliberadamente concebido utilizando qualquer ICs e de uma forma bastante old-fashioned, a fim de obter o comportamento de distorção harmônica e boa para evitar difícil encontrar componentes. O amplificador (s) pode ser convenientemente fornecidos por um plug-in de parede 12V transformador. Fechamento SW1 um bass boost é fornecido, mas, ao mesmo tempo, controle de volume deve ser aumentado para compensar a perda de potência em freqüências mais altas.<br />Em uso, R9 deve ser cuidadosamente ajustado para fornecer o mínimo sinal de distorção audível cross-over consistente com o mínimo de medida consumo corrente quiescente; um bom compromisso é definir a corrente de repouso em cerca de 10-15 mA.<br />Para medir esse fio, a corrente de um metro de corrente DC temporariamente em série com o coletor de Q3.<br /><br /> </span></div>
</blockquote>
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<span style="font-family: Verdana, sans-serif;"><br /><span style="background-color: white;"><b><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">Dados técnicos: </span></b><br /><br /><b><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">Potência de saída:</span></b><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;"> 1,5 Watt RMS @ 8 Ohm, 2,5 Watt @ 4 Ohm, 3,5 Watt @ 2 Ohms (1KHz sinewave) </span><b><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">Sensibilidade:</span></b><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;"> 100mV de entrada para a saída de 1,5 W @ 8 Ohm </span><b><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">Frequência de resposta:</span></b><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;"> 30Hz a 20kHz-1dB </span><b><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">Distorção harmônica total @ 1KHz e 10KHz:</span></b><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;"> Abaixo de 0,2% @ 8 Ohm 1W, abaixo de 0,3% @ 4 Ohm 2W, abaixo de 0,5% @ 2 Ohm 2W.</span></span></span></div>
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<span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; background-color: #c9d7f1; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; font-family: Verdana, sans-serif; position: relative;"><br /></span></div>
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<span style="font-family: Verdana, sans-serif;"><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; background-color: #c9d7f1; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">Fonte:</span><a href="http://iq-technologies.net/projects/audio/003/index.html" style="background-color: transparent;">http://iq-technologies.net/projects/audio/003/index.html</a></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-44405407207199161652012-01-08T02:00:00.000-02:002012-01-08T02:00:03.631-02:00Esquema de amplificador pequeno com transistor<span style="background-color: white; font-family: Verdana, sans-serif;"><span class="hlred" style="background-attachment: initial; background-clip: initial; background-origin: initial; text-decoration: underline;"><span class="">Descrição</span></span><span class=""> Um amplificador de pequena bateria conduzido com saída de 200mW. </span><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">Este é um amplificador adequado para rádios portáteis e equipamentos de outra bateria alimentada.</span></span>
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<span style="background-color: white; font-family: Verdana, sans-serif;"><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;"><br /></span></span><br />
<img height="456" src="http://www.zen22142.zen.co.uk/Circuits/Audio/250mW_amp.png" width="640" />
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<span style="font-family: Verdana, sans-serif;"><span class="hlred" style="background-attachment: initial; background-clip: initial; background-color: white; background-origin: initial; text-decoration: underline;"><span class="">Lista de Peças</span></span></span><br />
<span style="font-family: Verdana, sans-serif;"><u><br /></u><span style="background-color: white;"><span class="">R1 56k Resistor 1/4W </span></span><br /><span style="background-color: white;"><span class="">R2 15k 1/4W Resistor </span></span><br /><span style="background-color: white;"><span class="">1/4W Resistor R3 1.5k </span></span><br /><span style="background-color: white;"><span class="">1.5k 1/4W Resistor R4 </span></span><br /><span style="background-color: white;"><span class="">R5 100 1/4W Resistor </span></span><br /><span style="background-color: white;"><span class="">1/4W R6 100 Resistor </span></span><br /><span style="background-color: white;"><span class="">1/4W Resistor 100 R7 </span></span><br /><span style="background-color: white;"><span class="">R8 22 1 / 4W Resistor </span></span><br /><span style="background-color: white;"><span class="">C1 1000uF 25V capacitor eletrolítico </span></span><br /><span style="background-color: white;"><span class="">C2 10uF 25V eletrolítico capacitor </span></span><br /><span style="background-color: white;"><span class="">eletrolítico C3 470u 25V capacitor </span></span><br /><span style="background-color: white;"><span class="">T1 BC549C NPN transistor </span></span><br /><span style="background-color: white;"><span class="">T2 transistor NPN BC547 </span></span><br /><span style="background-color: white;"><span class="">BC547 T3 transistor PNP</span></span></span>
<br />
<span style="font-family: Verdana, sans-serif;"><span style="background-color: white;"><span class=""><br /></span></span></span><br />
<span style="font-family: Verdana, sans-serif;"><span style="background-color: white;"><span class="">Fonte:</span></span></span><a href="http://www.zen22142.zen.co.uk/Circuits/Audio/250mW_amp.htm">http://www.zen22142.zen.co.uk/Circuits/Audio/250mW_amp.htm</a>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com3tag:blogger.com,1999:blog-3413928269858245265.post-69251830043460727382012-01-06T02:29:00.000-02:002012-01-06T02:29:00.459-02:00Circuito Inversor De Lâmpada Fluorescente De 40W<div style="line-height: 24px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><img alt="projetos eletrônicos inversor 40w lâmpada fluorescente" src="http://makeelectronic.com/wp-content/uploads/2011/10/electronics-projects-40W-Fluorescent-Lamp-Inverter.gif" style="max-width: 100%; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /></span></span></div><div style="line-height: 24px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span class="">componente: </span><br />
<span class="">R1 1 180 Ohm Resistor 1W </span><br />
<span class="">R2 1 47 Ohm Resistor 1/4W </span><br />
<span class="">R3 1 2.2 Ohm Resistor 1W (só precisava de uma vez) </span><br />
<span class="">C1, C2 2 100uF 16V Capacitor Eletrolítico </span><br />
<span class="">C3 100nF 1 Capacitor cerâmico Disco </span><br />
<span class="">Q1 um TIP 3055 ou 2N3055 ou equivalente </span><br />
<span class="">L1 1 Ver "Notas" </span><br />
<span class="">T1 1 Consulte "Notas" </span><br />
<span class="">MISC fio 1, Case, Board, Dissipador Para Q1, heatshrink, AM haste de antena para bobina</span></span></span></div><div style="line-height: 24px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif;"><br />
</span></div><div style="line-height: 24px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span class="">Fonte:</span><a href="http://makeelectronic.com/schematics/make-electronics-projects-40w-fluorescent-lamp-inverter">http://makeelectronic.com/schematics/make-electronics-projects-40w-fluorescent-lamp-inverter</a></span></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-34601921309525615802012-01-05T02:31:00.004-02:002012-01-05T02:31:00.172-02:00Circuito Duplicador De Tensão<div style="line-height: 24px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><img alt="Voltage Doubler circuito esquemas" src="http://makeelectronic.com/wp-content/uploads/2011/09/voltage-doubler-circuit-schematics.gif" style="max-width: 100%; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /></span></span></div><div style="line-height: 24px;"><span style="background-color: white; font-family: Verdana, sans-serif;">Este circuito praticamente dobra a tensão da entrada, no entanto, a corrente de saída é baixa.produção dobrou está em "fonte V,</span></div><div style="line-height: 24px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Parte:<br />
U1 temporizador NE555 IC<br />
R1 2.2k ohm resistor<br />
R2 15k ohm resistor<br />
C1 0,01 uF cerâmica capacitor<br />
C2, C3 220 uF capacitor eletrolítico<br />
C4 470 uF capacitor eletrolítico<br />
D1, D2 diodo 1N4002</span></span></div><div style="line-height: 24px;"><span style="background-color: white; font-family: Verdana, sans-serif;"><br />
</span></div><div style="line-height: 24px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Fonte:<a href="http://makeelectronic.com/schematics/make-voltage-doubler-circuit-diagram">http://makeelectronic.com/schematics/make-voltage-doubler-circuit-diagram</a></span></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-81109977966960168242012-01-05T02:26:00.000-02:002012-01-05T02:26:00.511-02:00Circuitos Temporizador De Movimento<div style="line-height: 24px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><img alt="sensor de movimento 555 circuitos de temporizador" src="http://makeelectronic.com/wp-content/uploads/2011/11/motion-sensor-555-timer-circuits.jpg" style="max-width: 100%; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /></span></span></div><div style="line-height: 24px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Este sensor de movimento simples, baseada <strong>circuitos de timer 555</strong> responde às mudanças nos campos elétricos. Qualquer pessoa produz cerca de carga elétrica quando se deslocam por motivos de isolamento. Assim que alguém se aproxima do sensor, as luzes LED para cerca de 10 segundos.Você pode usá-lo para proteger o seu pinturas preciosas em seu museu particular.</span></span></div><div style="line-height: 24px;"><span style="background-color: white; font-family: Verdana, sans-serif;">Você também pode usar este circuito como uma tocha automática. Ele acende quando você tocá-lo.Se você não consegue encontrá-lo no escuro apenas mover seus sapatos um pouco no tapete e tal ganho alguma carga elétrica. Isso acionará a luz.</span></div><div style="line-height: 24px;"><span style="background-color: white; font-family: Verdana, sans-serif;"><br />
</span></div><div style="line-height: 24px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Fonte:<a href="http://makeelectronic.com/schematics/555-timer-based-motion-sensor-electronic-circuits">http://makeelectronic.com/schematics/555-timer-based-motion-sensor-electronic-circuits</a></span></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-85306686019390108722012-01-04T02:25:00.000-02:002012-01-04T02:25:00.673-02:00Circuito Temporizador com toque<center><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><img alt="Toque de alarme ativado" src="http://www.sentex.ca/~mec1995/circ/alarm2.gif" /></span></span></center><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><br />
</span></span><pre><b style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><u><span style="font-size: small;">Lista de Peças</span></u>
R1 = 100K D1 = 1N4004 (1N4001 ou qualquer outro, 2, etc) em geral diodo finalidade
R2 = 4K7 C1 = 47uF/16V, eletrolítico
R3 = 10M C2 = 0.1uF (100nF) de cerâmica
P1 = 100K IC1 = <a href="http://www.uoguelph.ca/~antoon/gadgets/ne555.htm"><b>555 Timer</b></a>
Ry = relé Q1 = 2N3904, 2N2222, ou similar
</span></b></pre><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><u>Notas adicionais</u><br />
Não há muito a dizer aqui, como o circuito de fala por si. O 555 pode ser quase qualquer tipo, todos eles são pin-compatíveis. Embora alguns tipos CMOS pode não ter energia suficiente para acionar o transistor, nesse caso, use um 555 comum. <b>C1 da</b> tensão de trabalho deve ser aumentada para 25V se você decidir ir com uma fonte de energia de 12V. <span class="">Alterar o valor de C1 para o pulso de saída desejado. </span><span class="">Para o timing usar esta equação: </span><b><span class="">T = 1,1 * (P1 + R1) * C1</span></b><span class=""> assumindo R1 + P1 = 150K, em seguida, selecione C1 da seguinte forma: C1 = 6uF para cada 1 segundo largura de pulso. </span>Por exemplo, se você quiser a largura de pulso a ser de 5 segundos, C1 deve ser mais próxima ou 30uf valor como 22 ou 33uF. Além disso, P1 pode ajustar o resto. Regra de ouro: a tensão de trabalho dos capacitores são, pelo menos, o dobro da tensão fornecida, em outras palavras, se a fonte de energia é 9 volts, o capacitor (s) é de pelo menos 18V. T1 transistor pode ser qualquer substituto aproximados. Use qualquer relé adequado para seu projeto e se você não estiver apertado no espaço, use qualquer tamanho. Eu tenho construir este circuito especial para impedir os estudantes de mexer com as câmeras de segurança em laboratórios de informática da Universidade Sou empregado. Tenho a certeza o invólucro de metal não foi aterrado. Mas como o esquema mostra basicamente você pode ligá-lo a qualquer tipo de superfície metálica. Eu usei uma fonte de alimentação de 12 VCC. Usar qualquer relé adequado para lidar com suas necessidades. Um interruptor de "Reset" ( <b>N</b> ormally <b>C</b> losed) pode ser adicionado entre o positivo eo 'seta-com-o-+'. O gatilho de arame (toque) está conectada ao pino 2 do 555 e irá acionar o relé, usando a sua resistência do corpo, quando tocado. É óbvio que a parte "tocar" tem de ser limpa e faz um bom contato com o fio de gatilho. Este circuito particular pode não ser adequado para todas as aplicações. Apenas no caso você quer saber porque o pino 5 não está listado no diagrama esquemático, mas não é realmente necessário. Em determinadas condições ruidosas um capacitor 0.01uF pequena cerâmica é colocada entre o pino 5 eo terra. Não faz nenhum dano para adicionar um ou deixá-lo fora. <i><b>NOTA:</b></i><i><b>Para aqueles de vocês que não percebeu, há um atraso de 5 segundos aproximada build-in antes da ativação do relé para evitar disparo falso, ou uma 'would-be 'ladrão, etc</b></i> NOVAMENTE, certifique-se a trava (pino 2) não é tocar em nada 'chão' ou o circuito só fica reiniciando-se e assim não vai funcionar. Meu barracão tem portas de madeira de modo funciona bem. Se você não pode adquirir o seu ao trabalho, verificar a entrada de disparo, verifique se há algum tipo de sinal proveniente do pino de saída 3, brincar com o valor de R3/C1, etc O circuito original, tal como apresentado por W. Knight para <i>Hands-on</i> revista, foi como mostrado abaixo. R2 é substituído pelos dois resistores eo capacitor 33uF para o atraso.<br />
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</span></span><center><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><img alt="" height="230" src="http://www.sentex.ca/~mec1995/circ/alarm2b.gif" width="280" /></span></span></center><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><br />
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<span class="">Se você está interessado em um breve tutorial sobre o 555 Timer / Oscillator IC ou encontrar-se ter alguns problemas de compreensão de algumas das funções pin, consulte aqui: </span><b><span class=""><a href="http://www.uoguelph.ca/~antoon/gadgets/555/555.html">555 Tutorial</a></span></b></span></span><br />
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<span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><b>Fonte:</b></span></span><a href="http://www.sentex.ca/~mec1995/circ/alarm2.htm">http://www.sentex.ca/~mec1995/circ/alarm2.htm</a>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-21699649245695003302012-01-04T00:00:00.012-02:002012-01-04T00:00:06.826-02:00Circuito Transmissor de vídeo sem fio<div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 1.3em; margin-bottom: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; font-family: Verdana, sans-serif;"><a href="http://freeelectroniccircuit.com/wireless-video-transmitter.html" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;" title="Transmissor de vídeo sem fio"><strong style="font-weight: bold;"><span class="">Transmissor sem fio de vídeo</span></strong></a><span class=""> do circuito abaixo pode ser usado para enviar sinais de vídeo em torno da casa, ou usado para transmitir sinais de vídeo de uma câmera. </span><span class="">No entanto, também a fonte do sinal de vídeo pode também ser obtida VCD e DVD player ou saída de vídeo do equipamento de vídeo múltiplos. </span><span class="">Você pode simplesmente digitalizar este sinal em um receptor de televisão de acordo com a freqüência de trabalho do transmissor de vídeo.</span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 1.3em; margin-bottom: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; font-family: Verdana, sans-serif;">Este é um circuito simples que podem ser construídos facilmente em uma placa de PCB, mas você também deve entender os princípios de freqüência, porque a freqüência de trabalho do <em style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">transmissor de vídeo wireless</em> é baseado em osciladores LC. <span class="">Freqüência é elevada, simplesmente a abordagem do valor da freqüência de acordo com o valor da condutância "L" e capacitância "C". </span><span class="">No entanto, estes componentes LC você pode ver no </span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-decoration: underline; vertical-align: baseline;"><span class="">vídeo sem fio transmissor</span></span><span class=""> esquema abaixo.</span></span></div><div class="wp-caption aligncenter" id="attachment_290" style="border-bottom-color: rgb(255, 255, 255); border-bottom-style: solid; border-bottom-width: 1px; border-color: initial; border-image: initial; border-left-color: rgb(255, 255, 255); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(255, 255, 255); border-right-style: solid; border-right-width: 1px; border-style: initial; border-top-color: rgb(255, 255, 255); border-top-style: solid; border-top-width: 1px; line-height: 18px; margin-bottom: 10px; margin-left: auto; margin-right: auto; margin-top: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 4px; text-align: center; vertical-align: baseline; width: 310px;"><a href="http://freeelectroniccircuit.com/wp-content/uploads/2011/09/wireless-video-transmitter-circuit-board.jpg" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img alt="Sem fio de vídeo Placa de Circuito Transmissor" class="size-medium wp-image-290" height="226" src="http://freeelectroniccircuit.com/wp-content/uploads/2011/09/wireless-video-transmitter-circuit-board-300x226.jpg" style="border-bottom-style: none; border-color: initial; border-color: initial; border-color: initial; border-color: initial; border-color: initial; border-image: initial; border-left-style: none; border-right-style: none; border-style: initial; border-top-style: none; border-width: initial; border-width: initial; border-width: initial; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;" title="Sem fio de vídeo Placa de Circuito Transmissor" width="300" /></span></a><div class="wp-caption-text" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; line-height: 17px; padding-bottom: 5px; padding-left: 4px; padding-right: 4px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; font-family: Verdana, sans-serif;">Sem fio de vídeo Placa de Circuito Transmissor</span></div></div><h3 style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 1.1; margin-bottom: 0.6em; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-shadow: rgb(170, 170, 170) 0px 1px 0px; vertical-align: baseline;"><span style="background-color: white; font-family: Verdana, sans-serif; font-size: small;">Vídeo sem fio Diagrama de Circuito Transmissor</span></h3><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOku2FQPhI3rWDMhdMaWjZzf5iBqfk6O6z4sJb5mCQUodAw0iRm_udGPTBP9_OLAL174QHNlR5Yx3FJxLpCfQgbsODtILjzVLmGAylj60GM1jWV9aPts5ESYiUrQQfUHLmU8L6iBhMGkA/s1600/%2527Circuito+Transmissor+sem+fio+de+v%25C3%25ADdeo.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOku2FQPhI3rWDMhdMaWjZzf5iBqfk6O6z4sJb5mCQUodAw0iRm_udGPTBP9_OLAL174QHNlR5Yx3FJxLpCfQgbsODtILjzVLmGAylj60GM1jWV9aPts5ESYiUrQQfUHLmU8L6iBhMGkA/s1600/%2527Circuito+Transmissor+sem+fio+de+v%25C3%25ADdeo.jpg" /></span></a></div><div class="separator" style="clear: both; text-align: center;"><span style="background-color: white; font-family: Verdana, sans-serif;"><br />
</span></div><div><span style="background-color: white; font-family: Verdana, sans-serif;"><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 1.3em; margin-bottom: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">No <strong style="font-weight: bold;">vídeo sem fio transmissor</strong> esquemático, a freqüência gerada por um oscilador usando transistor BF199, onde a determinação da frequência de saída é afetada pelo L1 componentes, capacitor 33PF, 22pf, capacitor trimmer 10PF como um todo. Para a determinação de freqüência do transmissor de vídeo sem fio através do capacitor trimmer 10PF usando uma chave de fenda anti-indução. Faixa de freqüência de saída prazo de 470MHz até 580MHz ou mais (UHF canais 21-34).</div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 1.3em; margin-bottom: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="">Oscilador de freqüência de saída e amplificado por um amplificador usando um tampão BFR90 transistor. </span>Então a saída do amplificador da média do sinal é encaminhado para um amplificador final que também funciona como um mixer de vídeo é injetado através do emissor. Transistores são usados para frequência de trabalho deve ser capaz de trabalhar para a faixa de freqüência UHF.Entrada de vídeo é ajustado através do potenciômetro de 1K. Forma de uma pequena antena de cabo 10-20 cm.</div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 1.3em; margin-bottom: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="">É importante lembrar-se de construir o transmissor de vídeo sem fio é que as dimensões do tamanho da bobina (L) de acordo com a freqüência de operação desejada. </span>Valor de condutância da bobina é fazer com que a bobina da seguinte forma:<br />
L1, L2 = 3 voltas, mm Diâmetro 3, 0,5 milímetro de fio<br />
L3 = 2 voltas, diâmetro. 3 mm, 0,5 mm fios</div><div class="wp-caption aligncenter" id="attachment_292" style="border-bottom-color: rgb(255, 255, 255); border-bottom-style: solid; border-bottom-width: 1px; border-color: initial; border-image: initial; border-left-color: rgb(255, 255, 255); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(255, 255, 255); border-right-style: solid; border-right-width: 1px; border-style: initial; border-top-color: rgb(255, 255, 255); border-top-style: solid; border-top-width: 1px; line-height: 18px; margin-bottom: 10px; margin-left: auto; margin-right: auto; margin-top: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 4px; text-align: center; vertical-align: baseline; width: 310px;"><a href="http://freeelectroniccircuit.com/wp-content/uploads/2011/09/wireless-video-transmitter-circuit-board-with-cabling.jpg" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><img alt="Wreless Vídeo Placa de Circuito Transmissor com Cabeamento" class="size-medium wp-image-292" height="226" src="http://freeelectroniccircuit.com/wp-content/uploads/2011/09/wireless-video-transmitter-circuit-board-with-cabling-300x226.jpg" style="border-bottom-style: none; border-color: initial; border-color: initial; border-color: initial; border-color: initial; border-color: initial; border-image: initial; border-left-style: none; border-right-style: none; border-style: initial; border-top-style: none; border-width: initial; border-width: initial; border-width: initial; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;" title="Wreless Vídeo Placa de Circuito Transmissor com Cabeamento" width="300" /></a><div class="wp-caption-text" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; line-height: 17px; padding-bottom: 5px; padding-left: 4px; padding-right: 4px; padding-top: 0px; vertical-align: baseline;">Wreless Vídeo Placa de Circuito Transmissor com Cabeamento</div></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 1.3em; margin-bottom: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="">Você deve certificar-se o sinal de vídeo a partir do transmissor sem fio pode ser bem recebido no receptor de televisão com um cabo curto conecta cerca de 10-20 cm na saída da antena. </span><span class="">E fornecem tensão de entrada 9-15V para funcionar corretamente. </span><span class="">Transmissor de vídeo pode cobrir uma distância de 100 metros. </span>Boa sorte para construir um <a href="http://go2media.blogspot.com/2008/10/470-580-mhz-uhf-tv-transmitter.html" rel="nofollow" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;" title="transmissor de vídeo sem fio" wrc_done="true">transmissor de vídeo sem fio</a> </div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 1.3em; margin-bottom: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Fonte:<a href="http://freeelectroniccircuit.com/wireless-video-transmitter.html" style="background-color: transparent;">http://freeelectroniccircuit.com/wireless-video-transmitter.html</a></div></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com1tag:blogger.com,1999:blog-3413928269858245265.post-78408936469587929122012-01-03T00:00:00.000-02:002012-01-03T00:00:05.842-02:00'Esquema de amplificador de 35 com CI LM391<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEidRWWtBM_sl48RWSfNqq0b7NTD08L8w3Su_fft5E_UeMEEIVxWpkq-vNxF5cYFdQPJP5JH7ZMiUyfjROCg2h8xYkzHIwbYuszLEUrVi9Qekp8TIYpQeou2dMdpa88zOetyJycAPYmK56k/s1600/%2527esquemaeletronicodeamplificadorde35w.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" height="401" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEidRWWtBM_sl48RWSfNqq0b7NTD08L8w3Su_fft5E_UeMEEIVxWpkq-vNxF5cYFdQPJP5JH7ZMiUyfjROCg2h8xYkzHIwbYuszLEUrVi9Qekp8TIYpQeou2dMdpa88zOetyJycAPYmK56k/s640/%2527esquemaeletronicodeamplificadorde35w.jpg" width="640" /></span></a></div><div class="separator" style="clear: both; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span class="" style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;">Este é o diagrama de circuito de um amplificador de áudio de 35W com base no LM391. </span><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;">O LM391 é um controlador abrangente para os transistores de potência. </span><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;">Ele precisa apenas poucos componentes externos para o trabalho.</span><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;">Com a TR1, podemos ajustar a corrente de polarização para 45mA. </span><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;">Indutor L1 consiste em 20 voltas de fio de 0,9 milímetro de espessura, em torno do R16 resistor. </span><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;">Os transistores Q3-4 deve ser colocado em um dissipadores de calor. </span><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;">Se você usar o Q3-4 com o tipo de TIPxxxx, você pode ser colocado diretamente na placa. </span><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;">Mas se você usar transistores embalados TO-3, então ele deve ser conectado com cabos curtos para as respectivas posições do conselho.</span> </span></span></div><div class="separator" style="clear: both; text-align: left;"><span style="background-color: white; font-family: Verdana, sans-serif; line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"><br />
</span></div><div class="separator" style="clear: both; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif; line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"></span></span></div><div style="margin-bottom: 15px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Lista de Peças</span></span></strong></span></div><table border="0" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><tbody style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R1, 3,5,8,10 = 1Kohm</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C1 = .22 63V</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">TR1 = Trimmer 10K</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R2, 7,11 100kOhm =</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C2 = 4.7uF 25V</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">D1, 2 = IN4002</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R4, 6 = 4.7Kohm</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C3, 17 = 47uF 63V</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">IC1 = LM391</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R9, 12 = 100ohm</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C4, 8,9 = 1nF 100V MKT</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Q1 = BD139</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R13 = 47Kohm</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C5 = 47nF 100V MKT</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Q2 = BD140</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R14, 15 = 0.15ohm 5W</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C6 = 22pF cerâmico</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Q3 = TIP2955</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R16 = 1ohm 2W 5% de carbono</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C7, 11,12,13 = 100nF 100V MKT</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Q4 = TIP3055</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R17 = 10OHM carbono 1W 5%</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C10 = 22pF cerâmico</span></span></td><td style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">L1 = Veja o texto</span></span></td></tr>
</tbody></table><div style="margin-bottom: 15px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><br />
</span></span></strong></span></div><div style="margin-bottom: 15px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Inferior (helicóptero) layout PCB:</span></span></strong></span></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwofAqZCW2P0Ekxh-JPqnokPA4WXKbTQNsQLDOYvZyCDTXsLvFgnDSV1d6E8aag1HyDDJ5B8psHp0fSfi4XSSkxyW7pl-tQdg34s6ZN9SkyFEvkvfQDRuirrGAhCuVRL-KJWZ_MYIHM0M/s1600/%2527esquemaeletronicodeamplificadorde35wpcipcb.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" height="350" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwofAqZCW2P0Ekxh-JPqnokPA4WXKbTQNsQLDOYvZyCDTXsLvFgnDSV1d6E8aag1HyDDJ5B8psHp0fSfi4XSSkxyW7pl-tQdg34s6ZN9SkyFEvkvfQDRuirrGAhCuVRL-KJWZ_MYIHM0M/s640/%2527esquemaeletronicodeamplificadorde35wpcipcb.jpg" width="640" /></span></a></div><div class="separator" style="clear: both; text-align: center;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><strong style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Top (componente) layout PCB:</span></span></strong> </span></span></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOl-TsAbqJRmHvOdTkbcm1RghnD-jGm6CxTwbks55LAbNGwtS0c5XOZ4C8L2KmPz27odiSivcZ1AZJlwcOzlOBHAx8OCfeoSTRS-dIzsdzjNylAAFCQW2QQLjxL9Uv3mP7ooPHw6nPIDk/s1600/%2527esquemaeletronicodeamplificadorde35wpcipcbcomponentes.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" height="353" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOl-TsAbqJRmHvOdTkbcm1RghnD-jGm6CxTwbks55LAbNGwtS0c5XOZ4C8L2KmPz27odiSivcZ1AZJlwcOzlOBHAx8OCfeoSTRS-dIzsdzjNylAAFCQW2QQLjxL9Uv3mP7ooPHw6nPIDk/s640/%2527esquemaeletronicodeamplificadorde35wpcipcbcomponentes.jpg" width="640" /></span></a></div><div class="separator" style="clear: both; text-align: center;"><strong style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><br />
</span></span></strong></div><div class="separator" style="clear: both; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Fonte:<a href="http://amplifiercircuit.net/35w-audio-amplifier-based-lm391.html">http://amplifiercircuit.net/35w-audio-amplifier-based-lm391.html</a></span></span></div><div style="margin-bottom: 15px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><br />
</span></span></strong></span></div><div style="margin-bottom: 15px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="line-height: 18px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><br />
</span></span></strong></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-26850006228155297032012-01-02T03:20:00.001-02:002012-01-02T03:20:02.688-02:00'Amplificador estéreo para Headphone com PCB<span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"> </span><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Além do uso óbvio como um amplificador de auscultadores, o circuito pode ser usado para uma variedade de aplicações onde uma grande largura de banda do amplificador de baixa potência é necessária. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">O circuito é baseado em um opamp, com a sua corrente de saída impulsionado por um par de transistores. </span></span></span><br style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;" /><span style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">viés Os diodos devem ser 1N914 ou similar - diodos de potência não são recomendados, pois sua tensão para a frente é muito baixa. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Isso pode resultar em distorções em torno da região de crossover, onde um transistor desliga e outro no. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">De crédito para este circuito vai para </span></span><a href="http://siliconchip.com.au/" style="font-weight: 700; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-decoration: none;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">SiliconChip</span></span></a></span></span></span><br />
<div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"></div><hr style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;" width="100%" /><span style="background-color: white; line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Imagem do circuito:</span></span></span><br />
<div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"></div><div style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><a href="http://extremecircuits.blogspot.com/2009/09/stereo-headphone-amplifier-circuit.html" style="font-weight: 700; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-decoration: none;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5357524243445876162" src="http://lh3.ggpht.com/_FdGFE8NBDgc/SsC9cPJmwTI/AAAAAAAAA2I/QMmCkTm-Ztw/s512/stereo_headphone_amplifier_circuit_schematic_main.jpg" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; cursor: pointer; height: 443px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; width: 450px;" /></span></a></div><div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"></div><div style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><a href="http://extremecircuits.blogspot.com/2009/09/stereo-headphone-amplifier-circuit.html" style="font-weight: 700; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; background-color: white; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; color: black; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; position: relative;">Ver Of Stereo Diagrama de Circuito Amplificador Headphone</span></span></a></div><div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"></div><hr style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;" width="100%" /><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Partes layout:</span></span></span> </span></span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0oC7ZpNqq3vu2WkoQ6kPXh5dCM-o5zg0M31J7m_za-rTzmV4Esqr5-f0Ug_BRqxbijVXzO7Y5CxN6EevcnARfEn2aeNuaDchuQNh0BHtOfyNQVpzkizV-hS4mMb_r6-OGzy3KVkM3NGg/s1600/%2527esquemacircuitoamplificadorparafone.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0oC7ZpNqq3vu2WkoQ6kPXh5dCM-o5zg0M31J7m_za-rTzmV4Esqr5-f0Ug_BRqxbijVXzO7Y5CxN6EevcnARfEn2aeNuaDchuQNh0BHtOfyNQVpzkizV-hS4mMb_r6-OGzy3KVkM3NGg/s1600/%2527esquemacircuitoamplificadorparafone.jpg" /></span></a></div><div class="separator" style="clear: both; text-align: left;"></div><div style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><a href="http://extremecircuits.blogspot.com/2009/09/stereo-headphone-amplifier-circuit.html" style="font-weight: 700; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-decoration: none;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="background-color: white; color: black; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Partes layout Of Stereo Diagrama de Circuito Amplificador Headphone</span></span></a></div><div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"></div><hr style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" width="100%" /><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">PCB layout:</span></span></span> </span></span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgelw7PLdCdEJiR0AYNISSOn9V5wfg1iVzvVxgZuBQHxJGtvyOtAXppsckYgubeluVyHSZr6zktvKgdnu7LDZyZEHS_d-qKfnRI9nlzUOFGFJjyogYpXkpoZFdQlhD8GjMMSGsW33tXAo0/s1600/%2527esquemacircuitoamplificadorparafonepcb.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgelw7PLdCdEJiR0AYNISSOn9V5wfg1iVzvVxgZuBQHxJGtvyOtAXppsckYgubeluVyHSZr6zktvKgdnu7LDZyZEHS_d-qKfnRI9nlzUOFGFJjyogYpXkpoZFdQlhD8GjMMSGsW33tXAo0/s1600/%2527esquemacircuitoamplificadorparafonepcb.jpg" /></span></a></div><div class="separator" style="clear: both; text-align: center;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><br />
</span></span></div><div class="separator" style="clear: both; text-align: left;"></div><div style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><a href="http://extremecircuits.blogspot.com/2009/09/stereo-headphone-amplifier-circuit.html" style="font-weight: 700; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-decoration: none;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="background-color: white; color: black; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">PCB Layout do Diagrama de Circuito Amplificador Stereo Headphone</span></span></a></div><div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"></div><hr style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" width="100%" /><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Diagrama de circuito:</span></span></span> </span></span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhPaILF46kFXBkpTRCoTUuXNUYxL1qT9NptxSTbVVmBTm64vaz2hGYM9GaIYoRmY4-MzIegTsed2a7mTlOKWEBSAg0xniU5nbTUDeZ06etH9HOYvoYpihomI3z1m77bpx_qdUgPIrN-b9E/s1600/%2527Esquemadeamplificador300wcircuitodiagramaeletronico.GIF" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhPaILF46kFXBkpTRCoTUuXNUYxL1qT9NptxSTbVVmBTm64vaz2hGYM9GaIYoRmY4-MzIegTsed2a7mTlOKWEBSAg0xniU5nbTUDeZ06etH9HOYvoYpihomI3z1m77bpx_qdUgPIrN-b9E/s1600/%2527Esquemadeamplificador300wcircuitodiagramaeletronico.GIF" /></span></a></div><div class="separator" style="clear: both; text-align: center;"></div><div style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><a href="http://extremecircuits.blogspot.com/2009/09/stereo-headphone-amplifier-circuit.html" style="font-weight: 700; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-decoration: none;"><span style="background-color: white; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="color: black; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Stereo Headphone Diagrama de Circuito Amplificador</span></span></span></a><br />
<div style="margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"></div></div><hr style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;" width="100%" /><span style="background-color: white; line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Lista de peças:</span></span></span><br />
<div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"></div><div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Resistores </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">P1 = 50K </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R1 = 56K </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R2 = 22K </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R3 = 330K </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">= 10K R4 </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R5 = 10K </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R6 = 33R </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">33R = R7 </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R8 = 68R</span></span></span></span></span></div><div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Capacitores </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C1 = 0.27uF </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C2 = 10uF 35V- </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C3 = 5PF </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C4 = 100nF 63V- </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C5 = 100nF-63V</span></span></span></span></span></div><div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Semicondutores </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">D1 = 1N914 </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">D2 = 1N914 </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Q1 = BC338 </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Q2 = BC328 </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">IC1 = TL072</span></span></span></span></span></div><div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Misc. </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">J1 = soquete de entrada de áudio </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">J2 = Stereo Headphone socket</span></span></span></span></span></div><hr style="line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;" width="100%" /><span style="background-color: white; line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Desempenho de Prototype</span></span></span><br />
<div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"></div><div style="line-height: 17px; margin-bottom: 16px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Nível de saída == 90mR (max) em 8W headphones </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Sensibilidade de entrada == 0.83V RMS de potência total </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Frequência de resposta == 0.5dB para baixo em 30Hz e 20kHz </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Relação sinal-ruído-95dB == não ponderada (20Hz a 20kHz) com respeito ao sinal de entrada 500mV </span></span></span><br style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" /><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Separação entre canais = =-50dB entre 20Hz e 10kHz</span></span></span></span></span></div><br />
<div class="separator" style="clear: both; text-align: left;"><span style="font-family: Verdana, sans-serif;"><br />
</span></div><div class="separator" style="clear: both; text-align: left;"><span style="font-family: Verdana, sans-serif;"><span style="background-color: white; line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Fonte: </span></span></span><a href="http://skemarangkaian.com/stereo-headphone-amplifier-circuit-schematic/">http://skemarangkaian.com/stereo-headphone-amplifier-circuit-schematic/</a></span></div><span style="background-color: white; color: #444444; font-family: Tahoma, Verdana, Arial, sans-serif; font-size: 13px; line-height: 17px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><br />
</span></span></span>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-48668278959943043082012-01-02T01:21:00.000-02:002012-01-02T01:21:01.688-02:00COMO APAGAR COMPLETAMENTE UM CD<span style="font-family: Verdana, sans-serif;"><span class="" style="background-color: white; line-height: 18px;">Isso é loucura! </span><span class="" style="background-color: white; line-height: 18px;">Neste vídeo você verá como apagar completamente, realmente apagar um CD usando de alta tensão. </span><span style="background-color: white; line-height: 18px;">O autor está usando um gerador de alta tensão e um motor de spining o CD. </span><span style="background-color: white; line-height: 18px;">Há dois pontos de fonte para o HV e quando o CD gira, ele destrói a camada fina de alumínio, onde os dados são armazenados. </span><span style="background-color: white; line-height: 18px;">Divirta-se!</span> </span><br />
<div class="separator" style="clear: both; text-align: center;"><span style="font-family: Verdana, sans-serif;"><object width="320" height="266" class="BLOGGER-youtube-video" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" data-thumbnail-src="http://0.gvt0.com/vi/Zi_bMYFmFGg/0.jpg"><param name="movie" value="http://www.youtube.com/v/Zi_bMYFmFGg&fs=1&source=uds" /><param name="bgcolor" value="#FFFFFF" /><embed width="320" height="266" src="http://www.youtube.com/v/Zi_bMYFmFGg&fs=1&source=uds" type="application/x-shockwave-flash"></embed></object></span></div><div class="separator" style="clear: both; text-align: left;"><span style="font-family: Verdana, sans-serif;">Fonte:<a href="http://electroschematics.com/6430/how-to-completely-erase-a-cd/">http://electroschematics.com/6430/how-to-completely-erase-a-cd/</a></span></div><span style="background-color: white; font-family: Verdana, 'Trebuchet MS'; font-size: 13px; line-height: 18px;"><br />
</span>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-82988304018156798252012-01-02T01:14:00.000-02:002012-01-02T01:14:00.618-02:00Transmissor de fm com bom alcance<div style="color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><span style="font-family: Verdana, sans-serif;"><strong style="background-color: white; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Descrição.</span></span></strong><br />
<span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Com uma antena de correspondência, o circuito transmissor FM mostrada aqui pode transmitir sinais até uma faixa de 2 metros quilo. </span><span class="" style="background-color: white; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">O transistor Q1 e Q2 forma um estágio pré-amplificador clássico de alta sensibilidade. </span><span style="background-color: white; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">O sinal de áudio a ser transmitida é acoplado à base de Q1 através de C2 capacitor.</span><span style="background-color: white; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R1, R3, R4, R6, R5 e R9 são os resistores de polarização para o estágio pré-amplificador composto de Q1 e Q2. </span><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; background-color: white; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; position: relative;">Transistor Q3 executa o trabalho coletivo de misturador de oscilador e de potência final amplifier.C9 e L1 forma o circuito tanque que é essencial para a criação de oscilações. </span><span style="background-color: white; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Casais indutor L2 o sinal FM à antena.</span></span><br />
<span style="background-color: white;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"></strong></span></span></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Diagrama de circuito.</span></span></strong></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdxsX1X92__kZWZx4MCe-I7UdlTbK5kYsmsa_wBhBjjOREhBPgEFV1c5uMvR9f3YmUzjLUbx6fLgkyJI5G3hzdybNENcN7lJGJtaamiN37zU5x5wEz5D73IJorny-FMiX1YNDeU-OsedQ/s1600/transmissordefmsimples.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: Verdana, sans-serif;"><img border="0" height="273" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdxsX1X92__kZWZx4MCe-I7UdlTbK5kYsmsa_wBhBjjOREhBPgEFV1c5uMvR9f3YmUzjLUbx6fLgkyJI5G3hzdybNENcN7lJGJtaamiN37zU5x5wEz5D73IJorny-FMiX1YNDeU-OsedQ/s640/transmissordefmsimples.png" width="640" /></span></a></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"></span></span></strong></div><div style="font-weight: normal; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Notes.</span></span></strong></span></span></strong></div><ul style="font-weight: normal; list-style-image: initial; list-style-position: initial; list-style-type: square; margin-bottom: 0px; margin-left: 23px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto;"><li style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Monte o circuito em uma boa qualidade PCB.</span></span></span></span></strong></li>
<li style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">O circuito pode ser alimentado a partir de algo entre 9 a 24V DC.</span></span></span></span></strong></li>
<li style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Indutor L3 pode ser um tipo VK220J RFC.</span></span></span></span></strong></li>
<li style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Para L1 fazer 3 voltas de 1mm fio de cobre esmaltado sobre um plástico 10mm de diâmetro anterior. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">No mesmo núcleo fazer 2 voltas de um fio de cobre esmaltado milímetros perto de L1 e L2, que será.</span></span></span></span></strong></li>
<li style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Frequência pode ser ajustado pela variação C9.</span></span></span></span></strong></li>
<li style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R9 pode ser usado para ajustar o ganho.</span></span></span></span></strong></li>
<li style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Para um desempenho ideal, o valor de C8 também deve ser ajustado.</span></span></span></span></strong></li>
<li style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Usando uma bateria para alimentar o circuito irá reduzir o ruído.</span></span></span></span></strong></li>
</ul><div style="font-weight: normal; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"> Fonte:<a href="http://www.circuitstoday.com/2-km-fm-transmitter">http://www.circuitstoday.com/2-km-fm-transmitter</a></span></span></strong></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-21782680762356426662012-01-02T00:57:00.000-02:002012-01-02T00:57:00.087-02:00Transmissor e receptor de áudio infravermelho<div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Descrição.</span></span></strong></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><span style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Aqui está um link de áudio simples IR que pode ser usado para transmitir sinais de áudio de até 4 metros. </span><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">O sinal a ser transmitido é aplicado à base de Q1 via resistor transistor Q1 R4.The drives do IR D1 transmitir diodos e entrada de áudio D2.The será modulada para os sinais IR transmitidas. </span></span><br />
<span style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Os sinais transmitidos IR serão escolhidos pela foto transistor de tensão emissor Q2.The do transistor Q2 irá mudar de acordo com o som modulado com o sinal de IR. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">O Q3 Q4 transistores e amplifica o sinal para acionar o alto-falante ou headphone.C1 e formas R3 um filtro para evitar a interferência de sinais dispersos IR.</span></span></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Diagrama de circuito</span></span></strong></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi0weT8trmznqXFNi9aHS8z2hwLD-73uSC5XUyeYAuLThijrZE6Y0-X4HoI9LJ7FQZWebvhM-WPCODi0X6qNxnQ-OWNPWiPbINDBnEHdUttSmvTbgPUKnKJ1Zm0dC8XuxlZpNuXzkV7T7o/s1600/transmissordeaudioinfravermelhoereceptor.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: Verdana, sans-serif;"><img border="0" height="387" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi0weT8trmznqXFNi9aHS8z2hwLD-73uSC5XUyeYAuLThijrZE6Y0-X4HoI9LJ7FQZWebvhM-WPCODi0X6qNxnQ-OWNPWiPbINDBnEHdUttSmvTbgPUKnKJ1Zm0dC8XuxlZpNuXzkV7T7o/s640/transmissordeaudioinfravermelhoereceptor.jpg" width="640" /></span></a></div><div class="separator" style="clear: both; text-align: left;"></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Notas</span></span></strong></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">O circuito pode ser montado em um propósito geral PCB.</span></span></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Use baterias 9V PP3 para alimentar o transmissor eo receptor.</span></span></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">O fototransistor Q2 pode ser qualquer fototransistor NPN como PNZ154, PNA1605F, BPW77NA ou BPW85.</span></span></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Um alto-falante de 8 Ohm ou um fone de ouvido pode ser usado para ouvir o som.</span></span></div><div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><span style="font-family: Verdana, sans-serif;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Fonte:</span></span><a href="http://www.circuitstoday.com/simple-ir-audio-link" style="background-color: transparent; text-align: left;">http://www.circuitstoday.com/simple-ir-audio-link</a></span></div><span style="font-family: Verdana, sans-serif;"><br />
</span><br />
<div style="background-color: white; color: #333333; line-height: 22px; padding-bottom: 10px; padding-left: 0px; padding-right: 0px; padding-top: 10px; text-align: justify;"><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><br />
</span></span></strong></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-34852402262484251922012-01-02T00:00:00.000-02:002012-01-02T00:00:01.495-02:00'Esquema de Amplificador de 75W com PCB<div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 18px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">É um amplificador simples de construir, utiliza peças padrão e é estável e confiável. </span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">O projeto recomendado é uma adaptação ligeira de amp Eu originalmente concebido há muitos anos, centenas foram construídos. </span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">A maioria deles eram tão pequenos PA ou amplificador de instrumento alimentado, mas muitos também encontraram seu caminho para a casa de oi-fi sistemas. </span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">O amplificador é capaz de conduzir 4 ohm, mas Ele começa, no entanto, os limites dos transistores, mesmo quando utilizado em 4 Ohms encontrados muito poucos erros.</span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 18px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; font-family: Verdana, sans-serif;"><strong style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; font-weight: bold; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">O Circuito</span></span></strong><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Note que não há saída de curto-circuito, de modo que quando os alto-falantes estão em curto, enquanto que o amplificador está a funcionar (com sinal), há um perigo muito real de que os transistores são destruídos.</span></span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 18px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Uma vez que este amplificador foi construído comercialmente, a poupança valiam o risco - a maioria desses amplificadores foram instalados na caixa de alto-falante, têm tão pouco não foi provavelmente (a menos que a bobina de voz alto-falante algumas vezes em curto-circuito). </span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">ser usado por causa do custo do equipamento (pelo menos), é barato para reparar um amplificador, mesmo se você conseguir explodir.</span></span></div><div class="separator" style="clear: both; text-align: center;"></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFn7oaGk7876R37qfY8VwxHsTKhGno5OM25Xu7PmXq8yXibupgT1LAeM0NecP8uH3eQnTs92AfRWzqUCB9EACA9uDoQGnhEQzoIeqvLn8yLajAyiMnKWdtgg9erFD0GyuK7SOIhxqxgew/s1600/amplficador75w.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" height="497" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFn7oaGk7876R37qfY8VwxHsTKhGno5OM25Xu7PmXq8yXibupgT1LAeM0NecP8uH3eQnTs92AfRWzqUCB9EACA9uDoQGnhEQzoIeqvLn8yLajAyiMnKWdtgg9erFD0GyuK7SOIhxqxgew/s640/amplficador75w.png" width="640" /></span></a></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 18px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><br />
</span></span></div><div class="separator" style="clear: both; text-align: center;"><a href="http://www.free-circuit.com/wp-content/uploads/2011/04/Class_AB_TIP3055-75W_PCB.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" src="http://www.free-circuit.com/wp-content/uploads/2011/04/Class_AB_TIP3055-75W_PCB.PNG" /></span></a></div><div class="separator" style="clear: both; text-align: center;"><span style="background-color: white; font-family: Verdana, sans-serif;"><br />
</span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 18px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><br />
</span></span></div><div class="separator" style="clear: both; text-align: center;"></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; line-height: 18px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"></span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Característica do amplificador são os seguintes ...</span></span></span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Sensibilidade para 74 Watts de potência de saída - um pouco menos de 1V (1V é 75W) </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Ganho - 27 dB </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Gama de frequência (-3dB) - 10Hz a 23kHz @ 1W </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">THD, 1 kHz - 0,05% (máxima típica) </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">ganho de malha aberta - 125dB (sem carga ), 80dB (carga de 8 Ohm) </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Impedância de Entrada - 22k ohms </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">DC-Offset - menos de 100 mV (<20 mV típico **) </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Noise - <2 mV na saída (-80dB não ponderada ref 50W) </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Alterações no projeto original ...</span></span></span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Reduziu o valor da Classe-A base de resistor 560 ohms ** </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Aumentar o valor do capacitor 100uF bootstrap </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">cap estabilização Redução 100pF (220pF eles são usados) </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Adicionado a bobina de saída eo resistor de amortecimento (ver Notícias) </span></span><br />
<span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">** É concebível que um número de transistores não podem, o valor de 560 ohms está correto. </span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Se ele for encontrado, você pode precisar de "sintonia fina" para manter essa resistência, pelo menos, DC offset. </span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Se você realmente quisesse, você poderia até usar um potenciômetro (2k), e configurá-lo para a DC mínimo offset. </span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">É melhor esperar até que a temperatura estabilizada em primeiro lugar, mas não deve mesmo mudar muito.</span></span></span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Figura abaixo mostra layout de montagem</span></span></span></span></div><div class="separator" style="clear: both; text-align: center;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTz9-C0cNhVdTvsx-oUnxF2DejrV5aLD79B35VH3TfUknhy34iaxbozbY4o82MLHt3yS8NpETNV1gOBPUp2DdvMbc_0M2GDajsggX5HJiBjWeoSFAdHki2P233bshBJf-LIvYRbEgSh0c/s1600/amplificadorTIP3055-75W_Comp_Layout.PNG" imageanchor="1" style="background-color: white; margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTz9-C0cNhVdTvsx-oUnxF2DejrV5aLD79B35VH3TfUknhy34iaxbozbY4o82MLHt3yS8NpETNV1gOBPUp2DdvMbc_0M2GDajsggX5HJiBjWeoSFAdHki2P233bshBJf-LIvYRbEgSh0c/s1600/amplificadorTIP3055-75W_Comp_Layout.PNG" /></a></span></span></div><div class="separator" style="clear: both; text-align: left;"></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Além destas alterações, o amplificador é quase original, com uma entrega + /-35V (tensão de circuito aberto), como afirmou, vai dar 70W em 8 ohms muito satisfeito.</span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Em suas vidas, muitos dos mods acima foram de qualquer forma, fazê-lo porque eu nunca consegui encontrar o esquema de ligações quando eu precisava, era muitas vezes assim que eu fui junto! </span><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">É um testemunho honesto do resistor capacitor e amplificador que várias substituições podem ser feitas, e ainda funciona bem.</span></span></span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Os números de ruído e distorção são um pouco pessimista - não há distorção tão pouco na 1V (ou 20 para essa matéria) que a minha taxa de deformação tem grande dificuldade em uma medição legível. </span><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">A saída do osciloscópio indica que a maioria do que eu vejo é o ruído - a integração da saída (do meu alcance "pode) para eliminar o ruído revela pouco em tudo.</span></span></span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="background-color: white; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: Verdana, sans-serif; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><br />
</span></span></span></span></div><div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: -webkit-auto; vertical-align: baseline;"><span style="background-color: white; font-family: Verdana, sans-serif;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span class="" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;">Fonte:</span></span></span></span><a href="http://www.free-circuit.com/75w-amplifier-class-ab-circuit-with-tip3055/">http://www.free-circuit.com/75w-amplifier-class-ab-circuit-with-tip3055/</a></span></div><br />
<div style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 1.5em; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: inherit; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: inherit; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: inherit; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><span style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: inherit; font-style: inherit; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; outline-color: initial; outline-style: initial; outline-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; vertical-align: baseline;"><br />
</span></span></span></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com6tag:blogger.com,1999:blog-3413928269858245265.post-45058904109543832622012-01-01T06:00:00.002-02:002012-01-01T22:17:53.585-02:00Circuito infravermelho com LM555<span style="font-family: Verdana, sans-serif;"><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;">Transmissor de infravermelho e circuito receptor mostrado no diagrama esquemático abaixo pode ser usado como controle remoto. </span><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;">O transmissor é basicamente um circuito oscilador, ea frequência pode ser ajustada através do potenciômetro R1 (ou pot trimmer). </span><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;">Essa oscilação faz com que a certeza se o sinal pode ser distinguida de outra fonte pelo receptor.</span> </span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="http://2.bp.blogspot.com/-AziwgcJ79Cg/TvqCEnsXyYI/AAAAAAAAARU/JHGxG-F3MIk/s1600/555+Infravermelho+transmissor-receptor.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: Verdana, sans-serif;"></span></a></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheaj_UB54gpecG8llTD8yqQXJBBdpZhsLpxL6153jivNOZgiyZRDd6-KnwEbe6tp9AjO_LAVdknzqLkPsF1yGjQfwfvDCOSY6taL54whEZMY4orHniBD7i5Q2AZNiSN69gRBeULV_XsY0/s1600/555-Infrared-Transmitter-Receiver.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheaj_UB54gpecG8llTD8yqQXJBBdpZhsLpxL6153jivNOZgiyZRDd6-KnwEbe6tp9AjO_LAVdknzqLkPsF1yGjQfwfvDCOSY6taL54whEZMY4orHniBD7i5Q2AZNiSN69gRBeULV_XsY0/s1600/555-Infrared-Transmitter-Receiver.jpg" /></a></div><div class="separator" style="clear: both; text-align: left;"><span style="font-family: Verdana, sans-serif;"><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;">O receptor é realmente um filtro passa-banda que filtram sinal de ruído. </span><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;">A freqüência deste filtro é determinada por L e C no caminho de feedback (de saída para a entrada inversora do op-amp). </span><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;">D1 é inserido no caminho de feedback para que retificar sinal muito pequeno, uma vez que o mecanismo de feedback op-amp irá compensar a queda de tensão para a frente do diodo. </span><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;">A última op-amp é empregada como um comparador, com o limiar é ajustável via potenciômetro R3. </span><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;">O op-amp deve ser fornecido com + e - 12Volt, eo potenciômetro R3 deve ser fornecido com-12V.</span> </span></div><div class="separator" style="clear: both; text-align: left;"><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; font-family: Verdana, sans-serif; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;"><br />
</span></div><div class="separator" style="clear: both; text-align: left;"><span style="font-family: Verdana, sans-serif;"><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;">Fonte:</span><a href="http://www.simplecircuitdiagram.com/2010/10/21/555-infrared-transmitter-receiver/">http://www.simplecircuitdiagram.com/2010/10/21/555-infrared-transmitter-receiver/</a></span></div><span class="" style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; color: #333333; font-family: Georgia, 'Bitstream Charter', serif; font-size: 16px; line-height: 24px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: justify; vertical-align: baseline;"><br />
</span>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-90616449874056585352012-01-01T05:06:00.001-02:002012-01-05T18:23:18.021-02:00Esquema de decodificador de Closed caption<div align="left"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span class="">Esta nova técnica de mensagens na tela, chamada de closed caption está presente em ambas as transmissões de TV gravados, bem como transmissões ao vivo </span><span class="">. </span>É possível até mesmo gravar com casa de sinal de vídeo de computadores sem, simultaneamente, perder as informações de closed caption. A fábrica equipados com TV closed caption circuito de decodificação necessária a inclusão de mensagens na tela overlay recebido.</span></span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;">No nosso caso vamos ter um receptor de closed caption leva o sinal de um gravador de vídeo ou sintonizador e exibe-lo em um PC via porta serial RS232. Um programa de terminal padrão explora a porta serial e exibe as informações recebidas na tela. Quando um sinal é recebido títulos de closed caption luzes LED para indicar o estado.</span></div><div align="center"><span style="background-color: white; font-family: Verdana, sans-serif;"><img border="0" height="419" src="http://www.pablin.com.ar/electron/circuito/video/ccdecod/circuito.gif" width="647" /></span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;"><br />
Todo o circuito é alimentado por 5VDC (TTL compatível) e consome cerca de 100mA.</span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;">O sinal de vídeo é inicialmente filtrado para remover qualquer ruído presente na maioria dos sinais registrados internamente. Em seguida, é injetado no separador de sincronização integrado (4581) para decompor o sinal original. Csync terminal, que tem um estado de baixa durante a sincronização, o acesso ao terminal PA3 (pino 2) do microcontrolador. Apenas sincronismo composto é usado no sistema. Outros sinais são sintetizados dentro da microcontroladores, a fim de reduzir o número de terminais a serem utilizados.</span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;">O circuito integrado é uma revisão EL4581 LM1881 melhorado. Note que o 4581 funciona muito melhor do que o LM1881 quando o sinal disponível não é o ideal (como acontece com os sinais gravados com computadores em casa) ..</span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;">Um oscilador de 20 MHz para permitir o processamento de sinal de vídeo em um número mais preciso, mas isso exigiria muito mais de memória de trabalho para armazenar informações temporárias, que na maioria dos PICs há um propósito geral.</span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;">Os dados são de série, desta vez em cadeias e os dados enviados através de pinos RS232 6 e 7 do micro. A tensão negativa necessária para atender 232 padrões são gerados por meio de capacitores e diodos ligado ao terminal 6 do microfone.</span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;">Os switches de configuração use resistores de pull-up do ônibus, assim não há necessidade de colocar para fora. Uma vez que não foram implementadas nesta revisão de seu software de conexão é opcional (ou desnecessários).</span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;">O LED conectado ao micro PB4 brilha na presença de dados de closed caption no sinal de vídeo. Os outros dois LEDs ainda não têm função, assim que sua instalação é opcional.</span></div><div align="left"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O microprocessador opera a 16 MHz, que é ligeiramente menor do que 32 vezes a 503 KHz, que é frequentemente usado em closed caption.</span></span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;"><span class="">Para o protótipo foi utilizado um PIC16C84, assinatura Microchip. </span>Enquanto este componente é muito fácil de programa (por EEPROM) é especificado para operar a 10 MHz a 16 MHz como não sendo feito aqui. Em temperatura ambiente, tensões e os valores típicos, etc, etc, etc ... o chip funciona. Mas é aconselhável usar o PIC16C61.</span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;">Uma explicação mais detalhada (em Inglês) está disponível clicando <a href="http://www.pablin.com.ar/electron/circuito/video/ccdecod/cc.txt">aqui</a> .</span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;">Para micro código assembler, clique <a href="http://www.pablin.com.ar/electron/circuito/video/ccdecod/cc.asm">aqui</a> .</span></div><div align="left"><span style="background-color: white; font-family: Verdana, sans-serif;"><br />
</span></div><div align="left"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Fonte:<a href="http://www.pablin.com.ar/electron/circuito/video/ccdecod/index.htm">http://www.pablin.com.ar/electron/circuito/video/ccdecod/index.htm</a></span></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-63189771396595546712012-01-01T04:49:00.001-02:002012-01-01T05:14:02.341-02:00Esquema eletrônico de (ALARME SEM FIO EM FM)<div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><strong>CARACTERÍSTICAS:</strong>• Tensão de alimentação: 12V (transmissor) / 6V (receptor)<br />
• Faixa de freqüências: 88 a 108 MHz<br />
• Freqüência de modulação: 2,4 kHz (aprox.)<br />
• Alcance: 50m (tip)<br />
• Filtro: PLL (567)<br />
<br />
Muitas pessoas, por motivos diversos,deixam seus carros por noitar na rua, ficando sujeitos a ocorrências de roubos. A proteção do veículo nestas condições normalmente é feita por meio de um alarme convencional que, além de não poder ser neutralizado, em caso de um disparo acidental, gera um incômodo muito grande, pois o barulho pode acordar muitas pessoas e o proprietário tem de levantar e ficar exposto a perigos. O sistema proposto pode ser interessante para a proteção de veículos na rua, durante à noite. Trata-se de um sistema de alarme temporizado sem fio que através de um transmissor envia diretamente para um receptor um sinal e depois desliga automaticamente.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O envio do sinal é feito na faixa de FM, numa freqüência livre, sendo recebido por um rádiorelógio comum com pequena adaptação. A adaptação consiste no acréscimo de um jaque para ligação de um sistema de disparo e tem dupla finalidade. A primeira é evitar o chiado que normalmente existe num receptor sintonizado fora de estação e que está na condição de espera ou ainda recebendo um sinal sem modulação, como neste caso.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">A segunda é passar o sinal por um filtro de modo que sinais indesejáveis como ruídos atmosféricos, interferências provocadas pela passagem de veículos, possam causar o disparo errático do alarme.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O sistema transmissor na condição de espera tem um consumo de energia muito baixo, podendo desta forma, ficar ligado a noite inteira sem comprometer a bateria do carro.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><strong>COMO FUNCIONA</strong>O sistema é formado por duas unidades, uma transmissora e outra receptora, cujos diagramas de bloco são mostrados na figura 1.</span></div><div align="center" style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguURCnZ7nI0-6dMOmC2CgFClmfsvjYDGQSzX_lzScEcxxg-KXApr6kYNs_1csIFStg5zHLDfbg6Cw2jCDsg6suEVdjhgw9B7vuv4tfXUUYALZ0qWNLacnyk_oZ_G1CvOyRnARnUCwBqvs/s1600/alarmefmsemfio01.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguURCnZ7nI0-6dMOmC2CgFClmfsvjYDGQSzX_lzScEcxxg-KXApr6kYNs_1csIFStg5zHLDfbg6Cw2jCDsg6suEVdjhgw9B7vuv4tfXUUYALZ0qWNLacnyk_oZ_G1CvOyRnARnUCwBqvs/s1600/alarmefmsemfio01.gif" /></a></div><span style="font-family: Verdana, sans-serif;"><br />
</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Analisemos em primeiro lugar o funcionamento da unidade transmissora instalada no automóvel que deve ser protegido.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">A abertura de portas, quebra-vento ou capô vai provocar o acionamento de chaves de disparo que aterram momentaneamente a entrada de um monoestável com base num circuito integrado 555.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Neste circuito, a temporização vai determinar a duração do pulso de saída dada por R2 e C4. Para os valores escolhidos, temos um tempo de acionamento da ordem de 5 minutos, mais do que suficiente para acordar e alertar o dono do veículo sob condições normais.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O tipo de acionamento com o aterramento momentâneo da entrada do Cl1 permite que a própria chave que aciona a luz de cortesia, quando as portas são abertas, seja usada no disparo. A ligação em paralelo permite que tantas chaves quantas o leitor desejar sejam colocadas nos pontos a serem protegidos num carro.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O multivibrador monoestável com base no 555 aciona um oscilador de áudio com base em outro circuito integrado 555, mas agora operando na configuração astável.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Os resistores R3 e R4 e o capacitor C5 deste oscilador fixam sua freqüência de operação em torno de 2,4 kHz.O tom de áudio gerado por esta etapa serve para modular um pequeno trasmissor de FM que fica em funcionamento permanente.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">A operação permanente do transmissor quando o sistema é ativado facilita a localização de seu sinal e ajuste do receptor. Somente com a ativação das etapas anteriores o transmissor recebe a modulação, passando a transmitir um tom de áudio de 2,4 kHz e que será recebido pelo receptor.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Na versão básica, o transmissor tem por base um BF494, mas sua troca por um 2N2218 ou mesmo um BD135 com a redução de R7 para 56 ohms, permite que o alcance seja aumentado para 200 metros ou mais.</span></div><div align="justify" style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKW14LqvZL_TyCa6zKXH5wcMHKb8ocRiBb3ByUjeGaefiOAJlo3jAL6KpygXFfuP82mDPGg_AQlSeVr1rMI4YRec-LSv509mGoBMRCS6-o2LqHfQgg6Uzw9m8OfRshhQ9zEGii56pyz04/s1600/alarmefmsemfio02.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="258" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKW14LqvZL_TyCa6zKXH5wcMHKb8ocRiBb3ByUjeGaefiOAJlo3jAL6KpygXFfuP82mDPGg_AQlSeVr1rMI4YRec-LSv509mGoBMRCS6-o2LqHfQgg6Uzw9m8OfRshhQ9zEGii56pyz04/s320/alarmefmsemfio02.gif" width="320" /></a></div><span style="font-family: Verdana, sans-serif;">Observamos que o alcance depende não só da potência do transmissor como também da eventual existência de obstáculos, como por exemplo, lajes ou estruturas de metal no percurso do sinal que possam bloquear ou atenuar os sinais, veja a figura 2.<br />
</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O receptor para o alarme é simplesmente um rádio de FM comum, preferivelmente um rádiorelógio de cabeceira, pois sua alimentação é feita a partir da rede de energia e sua localização faz dele uma opção mais favorável.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O sinal é retirado do alto-falante. Para os tipos que possuam uma saída para fone, bastará conectar a unidade de disparo a este ponto do circuito. Para os que não possuam este recurso, devemos adaptar um jaque do tipo "circuito fechado". Este jaque, conforme sugere a figura 3, desliga o alto-falante do rádio quando o plugue é introduzido.</span></div><div align="center" style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj_41zwz97iwYaYWQJFni9bmFQkU6PHsIclO62IesjVLxb3iecWysdOLXtjF1pVJ1sJ1jy7WHoT4zELxvg-q12CIzRgYQ8xczr6yBJ9EveOmVb_QDOI_O7TMFKd3sW1gtjv1xq647Nsot8/s1600/alarmefmsemfio03.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj_41zwz97iwYaYWQJFni9bmFQkU6PHsIclO62IesjVLxb3iecWysdOLXtjF1pVJ1sJ1jy7WHoT4zELxvg-q12CIzRgYQ8xczr6yBJ9EveOmVb_QDOI_O7TMFKd3sW1gtjv1xq647Nsot8/s320/alarmefmsemfio03.gif" width="320" /></a></div><span style="font-family: Verdana, sans-serif;"><br />
</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O sinal de áudio é aplicado à entrada de um sensível filtro PLL com base no circuito integrado NE567, justamente sintonizado na freqüência de áudio que modula o transmissor. O trimpot P1 faz esta sintonia.<br />
Assim, quando o sinal for recebido pelo transmissor, a modulação de áudio de 2,4 kHz aparece na entrada do filtro PLL sendo reconhecida. Com isso, a saída do NE567 vai ao nível baixo, ativando o LED e ao mesmo tempo disparando o oscilador de áudio formado pelos transistores Q2 e Q3.<br />
O disparo ocorre quando a saída de base de Q1 vai ao nível baixo (0V) fazendo com que o transistor conduza, polarizando Q2 via R7. Este resistor (R7) em conjunto com C6 determina a tonalidade do tom gerado pelo oscilador. Valores na faixa de 22nF a 100nF podem ser experimentados e para R7 podem ser usados resistores entre 33k e 100k.<br />
O alto-falante usado no circuito só entra em ação quando o oscilador é ativado de modo a termos silêncio total na condição de espera. Nessas condições, a corrente exigida pelo circuito todo é muito baixa.</span></div><div align="justify" style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvdgVpZSqtnxVf83x9c-r4UsIR9qqgrU8tEvpm6fxW-Ul4_oAUbpHqeQLVjsj5oNNBYQy2XtWcb-vNWcJxs9zTYVABqizRHWEKYooi5cHKnbq3xwRAs9szHjpxvpKLNj3MIozm9_fqwg4/s1600/alarmefmsemfio04.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="308" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvdgVpZSqtnxVf83x9c-r4UsIR9qqgrU8tEvpm6fxW-Ul4_oAUbpHqeQLVjsj5oNNBYQy2XtWcb-vNWcJxs9zTYVABqizRHWEKYooi5cHKnbq3xwRAs9szHjpxvpKLNj3MIozm9_fqwg4/s640/alarmefmsemfio04.gif" width="640" /></a></div><span style="font-family: Verdana, sans-serif;">O circuito é alimentado por uma fonte simples de baixo consumo e dependendo das condições podem até ser usadas pilhas médias.<br />
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<strong>MONTAGEM</strong>Na figura 4, damos o diagrama completo do transmissor do alarme, que deve ser instalado no interior do veículo e alimentado por sua bateria.<br />
</span></div><div align="justify" style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVL1fkSoCm6_gS8izUmnR3B0ovQFfMYefo_9nYYtkFCQq-hKKgibNUxWEW_NR1giBlDG_9k9UtoUO8vJlrozLOu2j7K8ul71OjjTaGzXKzYD62aEXkTzsUn-DGswEdsHwJwACspGcxucs/s1600/alarmefmsemfio05.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="284" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVL1fkSoCm6_gS8izUmnR3B0ovQFfMYefo_9nYYtkFCQq-hKKgibNUxWEW_NR1giBlDG_9k9UtoUO8vJlrozLOu2j7K8ul71OjjTaGzXKzYD62aEXkTzsUn-DGswEdsHwJwACspGcxucs/s640/alarmefmsemfio05.gif" width="640" /></a></div><span style="font-family: Verdana, sans-serif;">A disposição dos componentes do transmissor numa placa de circuito impresso é mostrada na figura 5.<br />
</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Sugerimos que os circuitos integrados sejam montados em soquetes para maior segurança e facilidade de substituição. Os resistores são todos de 1/8 W com 5% ou mais de dissipação e os capacitores são todos cerâmicos, exceto C4 e C9 que são eletrolíticos para 16V e C5 que também pode ser de poliéster. A bobina L1 é formada por 4 espiras de fio 22 comum ou esmaltado em fôrma de 1 cm sem núcleo e o trimmer pode ter capacitâncias máximas de 20 a 50 pF. Tipos de porcelana ou plástico podem ser usados.<br />
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A antena consiste numa vareta de metal de 20 a 50 cm de comprimento. Esta antena deve ser colocada junto ao vidro do carro, longe de partes metálicas, observe a figura 6.</span></div><div align="center" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"></span></div><div align="justify" style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjySOtOQkRHAx4cyoqcv6bjC4QEe9ZullHhKy9a5NomhEIFIhTAVIvL7ZUGQ5giyGRkUNUCdguEqre6eSvhsBMDViAd8otcocWp2xr9wky4Nh2AaCmXQnwNPhYbbhnFOLw2Zhrx_Fr9q5o/s1600/alarmefmsemfio06.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjySOtOQkRHAx4cyoqcv6bjC4QEe9ZullHhKy9a5NomhEIFIhTAVIvL7ZUGQ5giyGRkUNUCdguEqre6eSvhsBMDViAd8otcocWp2xr9wky4Nh2AaCmXQnwNPhYbbhnFOLw2Zhrx_Fr9q5o/s1600/alarmefmsemfio06.gif" /></a></div><span style="font-family: Verdana, sans-serif;">Uma possibilidade interessante para antena é fixar um fio encapado junto ao vidro, do lado interno, num canto em que não possa ser facilmente visto.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Para a versão básica, use o transistor BF494 ou BF495. Se quiser maior alcance, use os transistores 2N2218 ou eventualmente o BD135 com pequenos radiadores de calor. Deve ser levado em conta que nestas versões o consumo é um pouco maior, da ordem de 100 mA. Assim, o aparelho não deve ficar ligado por mais de uma noite sem que o carro seja colocado em movimento de modo a repor a energia gasta da bateria.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O conjundo cabe facilmente numa pequena caixa plástica, podendo ser fixada em algum lugar oculto do carro. Um cabo blindado pode ser usado para levar o sinal até a antena.</span></div><div align="justify" style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimQbSgWrQvtycOe0crKRnq1l-5C9UiG1dv9RW7PXs7FSEEm0Vxe4vx1M77VJfhEyvIqNVj1WPDAp106zjckPAYy7k8h7MqURcuguKTTmMktYNKKdqAHonKM7K7yfD4yZOUhBejK2Mp114/s1600/alarmefmsemfio07.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="322" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimQbSgWrQvtycOe0crKRnq1l-5C9UiG1dv9RW7PXs7FSEEm0Vxe4vx1M77VJfhEyvIqNVj1WPDAp106zjckPAYy7k8h7MqURcuguKTTmMktYNKKdqAHonKM7K7yfD4yZOUhBejK2Mp114/s640/alarmefmsemfio07.gif" width="640" /></a></div><span style="font-family: Verdana, sans-serif;">Na figura 7, temos o diagrama completo da unidade que vai ser ligada ao receptor de rádio, contendo o filtro e o oscilador de áudio.<br />
</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">A disposição dos componentes desta unidade numa placa de circuito impresso é mostrada na figura 8.</span></div><div align="justify" style="background-color: white;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjiVg7qh67pNZYIT3jXlPL2FP8Er2XHBWUAMEE_fb05GkgCQyeRNS_QPnLWknSRsGjelbQk4XhWrPDiBPejT_Ae7iGRecBhHZ-f0VP2__I5AEXemDUzogUrTb8sZCDLBy90tzczuxXoutQ/s1600/alarmefmsemfio08.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="285" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjiVg7qh67pNZYIT3jXlPL2FP8Er2XHBWUAMEE_fb05GkgCQyeRNS_QPnLWknSRsGjelbQk4XhWrPDiBPejT_Ae7iGRecBhHZ-f0VP2__I5AEXemDUzogUrTb8sZCDLBy90tzczuxXoutQ/s640/alarmefmsemfio08.gif" width="640" /></a></div><span style="font-family: Verdana, sans-serif;"><br />
</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">O circuito integrado Cl1, também neste caso, deve ser instalado em soquete DIL. Para Cl2, dado o baixo consumo da unidade, não será preciso usar radiador de calor. O transformador tem enrolamento primário de acordo com a rede de energia e secundário de 9 + 9 V com pelo menos 250 mA de corrente. Os resistores são de 1/8 W ou mais e os capacitores menores tanto podem ser de poliéster como cerâmicos.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Os capacitores eletrolíticos devem ter tensão de trabalho de 16V ou mais, exceto C8 que é para 16 V ou 25 V.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Sugerimos a utilização de um alto-falante pequeno (5 cm) porém, de bom rendimento, para poder " acordar" o leitor com maior facilidade através do sinal de áudio. Os diodos são do tipo 1N4002 ou equivalentes de maior tensão e o LED é opcional.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Para conexão ao rádio pode ser usado um fio com um plugue ou mesmo ser feita uma conexão direta comutada por uma chavinha que desative o alto-falante quando o alarme estiver em operação.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Para P1, temos um trimpot comum de montagem vertical na placa de circuito impresso e para conexão ao rádio não precisa ser usado fio blindado, mas o comprimento máximo está limitado a 1 metro.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><strong>AJUSTE E USO</strong>Para testar o funcionamento do sistema, inicialmente ligue a unidade transmissora numa fonte de 12V com pelo menos 300mA de corrente.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Ligue nas proximidades um receptor de FM sintonizado em freqüência livre e sintonize CV do transmissor para que seu sinal seja captado com máxima intensidade. Este sinal, com os pontos A, B e C do transmissor desligados, consiste numa espécie de "sopro" que tampa completamente o chiado característico de fora de estação.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Depois, interligando por um instante qualquer um dos pontos A, B ou C com o 0V, obtemos o disparo do circuito, havendo a produção de um forte tom no receptor.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Este som deve permanecer por um intervalo de tempo da ordem de alguns minutos, determinado por R2 e C4. Se o tempo for muito curto, aumente o valor do capacitor. Valores na faixa de 100uF a 1000 uF podem ser experimentados, para alterações de valor no tempo de acionamento.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Comprovado o funcionamento do transmissor, podemos passar ao ajuste do sistema receptor.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Inicialmente, sintonizamos o rádio que vai ser usado com o alarme na freqüência do transmissor e conectamos o sistema de acionamento a saída de. fone ou a uma saída que corresponda ao alto-falante, caso ele seja desativado por meio de chave, conforme sugerido no texto.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Provocamos então o disparo do tom do transmissor, aterrando por um instante os pontos A, B ou C e depois ajustamos P1 até obter o acendimento do LED com o tom de áudio.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Quando o disparo terminar (temporização encerrada) o LED deve apagar. Com o acendimento do LED deve ocorrer a emissão do tom de alarme pelo circuito oscilador.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Feito o ajuste, instale a unidade transmissora no carro e retoque, o ajuste da freqüência do transmissor se necessário. Para usar o aparelho, o procedimento é o seguinte:</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Quando deixar o automóvel, ligue o alarme (considere que ele vai tocar por uns 5 minutos antes de rearmar sozinho).</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Vá até o receptor e sintonize o sinal, esperando que ele desligue. Quando isto ocorrer, conecte a unidade de disparo, mantendo-a ligada. Depois, é só ficar tranqüilo, pois se o alarme for disparado, a unidade em sua cabeceira vai emitir o som característico e lhe alertar.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><br />
<strong>LISTA DE MATERIAL<br />
a) Transmissor Semicondutores:</strong>Cl1, Cl2 - 555 - circuitos integrados<br />
Q1 - BF494 ou 2N2218 - transistor - ver texto</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><strong>Resistores: (1/8 W, 5%)</strong>R1, R3, R4 - 10 k<br />
R2 - 1 M<br />
R5 - 12 k<br />
R6 - 82 k<br />
R7-100 ohms</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><strong>Capacitores:</strong>C1, C2, C3, C10 - 100 nF - cerâmicos<br />
C4 - 470uF x 16 V - eletrolítico<br />
C5 - 22 nF - cerâmico<br />
C7 - 4,7 nF- cerâmico<br />
C8 - 4,7 pF - cerâmico<br />
C9 - 1 000uF x 16 V - eletrolítico<br />
CV- trimmer - ver texto</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><strong>Diversos:</strong>L1 - Bobina - ver texto<br />
F1 - 500 mA - fusível<br />
Placa de circuito impresso, caixa para montagem, suporte de fusível, antena, sensores, suportes para os circuitos integrados, fios, solda, etc.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><strong>b) Receptor:</strong>Cl1 - NE567 - circuito integrado PLL<br />
Cl2 - 7806 - circuito integrado - regulador de tensão<br />
Q1, Q3 - BC558 - transistores PNP de uso geral<br />
Q 2 - BC548 - transistor NPN de uso geral<br />
D1, D2 - 1N4002 - diodos de silício<br />
LED - LED vermelho comum<br />
<br />
<strong>Resistores: (1/8 W, 5%)</strong>R1 - 100 ohms<br />
R2 - 100k<br />
R3, R5, R8 - 1k<br />
R4 - 56k<br />
R6 - 33k<br />
R7 - 56k<br />
P1 - 100k - trimpot<br />
<br />
Capacitores:<br />
C1, C2 - 100nF- cerâmicos ou poliéster<br />
C3 - 10uF x 16 V- eletrolítico<br />
C4 - 15nF- cerâmico ou poliéster<br />
C5 - 22uF x 16V - eletrolítico<br />
C6 - 33nF - cerâmico ou poliéster<br />
C7 - 100uF x 16V - eletrolítico<br />
C8 - 1000uF x 16 V - eletrolítico<br />
<br />
<br />
Diversos:<br />
FTE - 8 ohms x 5 cm - alto-falante<br />
T1 - Transformador com primário de acordo com a rede local e secundário de 9 + 9 V com pelo menos 250 mA<br />
Placa de circuito impresso, caixa para montagem, cabo de alimentação, plugue para fone conforme receptor, fios, solda, etc.</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><br />
</span></div><div align="justify" style="background-color: white;"><span style="font-family: Verdana, sans-serif;">Fonte:http://www.eletronicafacil.hdfree.com.br/RF/Alarmesemfioemfm/alarmeemfm.htm</span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-72453395495722674072012-01-01T01:28:00.000-02:002012-01-01T01:28:00.672-02:00Circuito gerador de (ansiedade)<span style="background-color: white; font-family: Verdana, sans-serif;"><span style="line-height: 18px;"><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">A fim de produzir a inquietação tem de ligar este circuito para um amplificador de áudio de forma a obter pressão sonora suficiente no quarto para pegar o impacto cheio. </span></span><br style="line-height: 18px;" /><span style="line-height: 18px;"><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">Você pode usar o potenciômetro 47K para ajustar o nível de saída em diante 2. </span><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; position: relative;">Não use essa ansiedade gerador de sintomas por um longo período de tempo, porque os efeitos a longo prazo não foram testados.</span></span></span><br />
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<span style="font-family: Verdana, sans-serif;"><strong style="background-color: white; line-height: 18px;"></strong></span><br />
<div style="background-color: white; line-height: 18px;"></div><h2 style="background-color: white; line-height: 18px; margin-bottom: 10px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"><span class="" style="font-family: Verdana, sans-serif; font-size: small;">Os sintomas de ansiedade Diagrama de Circuito Gerador</span></h2><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPdKMF8TRJB58RfnEdY975HMk1SkcrLt88uGWVX0bYlLdzdov5WTC5yA7FZL0oa9yMoouSUV5XEMTAkm-kCTK-usP8uwCiW3MWWss7wxRM_XfJSr-3zlbUp9l-mET6Own5PanJR2m2dSw/s1600/%2527circuitogeradordeansiedade.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: Verdana, sans-serif;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPdKMF8TRJB58RfnEdY975HMk1SkcrLt88uGWVX0bYlLdzdov5WTC5yA7FZL0oa9yMoouSUV5XEMTAkm-kCTK-usP8uwCiW3MWWss7wxRM_XfJSr-3zlbUp9l-mET6Own5PanJR2m2dSw/s1600/%2527circuitogeradordeansiedade.png" /></span></a></div><div class="separator" style="clear: both; text-align: left;"><span style="font-family: Verdana, sans-serif;"><span class="goog-text-highlight" style="-webkit-box-shadow: rgb(153, 153, 170) 2px 2px 4px; background-color: #fdfdfd; box-shadow: rgb(153, 153, 170) 2px 2px 4px; box-sizing: border-box; line-height: 19px; position: relative; text-align: -webkit-auto;">Você pode usar qualquer transistor NPN de baixa potência como o BC547, BC548. </span><span class="" style="background-color: #fdfdfd; line-height: 19px; text-align: -webkit-auto;">As saídas são para ligar o circuito para um amplificador de áudio.</span> </span></div><div class="separator" style="clear: both; text-align: left;"><span class="" style="background-color: #fdfdfd; font-family: Verdana, sans-serif; line-height: 19px; text-align: -webkit-auto;"><br />
</span></div><div class="separator" style="clear: both; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;"><span style="line-height: 19px;">Fonte:</span><a href="http://electroschematics.com/5048/anxiety-symptoms-generator/">http://electroschematics.com/5048/anxiety-symptoms-generator/</a></span></div><div><span class="" style="font-family: Verdana, sans-serif; font-size: small;"><br />
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</span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-19226598094607965732011-12-31T10:58:00.002-02:002011-12-31T10:58:00.681-02:00Circuito Amplificador de Potência 300W para Subwoofer<span style="font-family: Verdana, sans-serif;"><b style="background-color: white; color: #666666;"><span class="">Introdução</span></b><span style="background-color: white; color: #666666;"></span></span><br />
<div style="background-color: white; color: #666666;"><span style="font-family: Verdana, sans-serif;"><span class="">Os dispositivos de saída são MJL4281A (NPN) e MJL4302A (PNP), e largura de banda alta do recurso, SOA excelente (área de operação segura), alta linearidade e de alto ganho. </span>Transistores de driver são MJE15034 (NPN) e MJE15035 (PNP). Todos os dispositivos são classificados em 350V, com os transistores de potência com a dissipação de 230W e os drivers são 50W.</span></div><div style="background-color: white; color: #666666;"><span style="font-family: Verdana, sans-serif;"><span class="">Tendo construído uma P68 usando esses transistores, eu recomendo eles altamente - o amplificador é certamente no seu melhor com o ganho de altura e linearidade oferecidas por esses dispositivos. </span>Note que existem algumas pequenas alterações ao circuito (mostrado abaixo).</span></div><div style="background-color: white; color: #666666;"><span style="font-family: Verdana, sans-serif;">Amplificadores de potência elevada não são muito comuns como projetos, uma vez que são por sua natureza, normalmente difícil de construir, e são caros. Um pequeno erro durante a montagem significa que você começar de novo - isso pode ficar muito caro. <span class="">Eu recomendo que você use o PCB para este amplificador, pois vai lhe poupar muita dor. </span>Este não é um amplificador para iniciantes que trabalham com Veroboard!</span></div><div style="background-color: white; color: #666666;"><span style="font-family: Verdana, sans-serif;">O amplificador pode ser montado por um amador razoavelmente experientes em cerca de três horas. O metal vai demorar um pouco mais, e isso é especialmente verdadeiro para a variante de alta potência contínua. Mesmo assim, é simples de construir, compacto, relativamente barato, e fornece um nível de desempenho que irá satisfazer a maioria dos requisitos.</span></div><span style="color: red; font-family: Verdana, sans-serif;"><br style="background-color: white;" /></span><div style="background-color: white;"></div><div style="background-color: white;"><b><span style="color: red; font-family: Verdana, sans-serif;">ADVERTÊNCIAS:</span></b></div><ul style="background-color: white; color: #666666;"><li><span style="font-family: Verdana, sans-serif;">Este amplificador não é trivial, apesar de seu pequeno tamanho e aparente simplicidade. O DC total é superior a 110V, e pode matá-lo.</span></li>
<li><span style="font-family: Verdana, sans-serif;">A potência dissipada é tal que é necessário muito cuidado com a montagem de transistor.</span></li>
<li><span style="font-family: Verdana, sans-serif;">O S300 é destinado para o serviço intermitente em 4 Ohm cargas, como será normalmente encontrada em um subwoofer. NÃO se destina a PA ou de outra obrigação contínua, e embora possa funcionar bem por muitos anos pode, eu absolutamente não recomendo este.</span></li>
<li><span style="font-family: Verdana, sans-serif;">Para o trabalho contínuo, não use menos de 8 Ohms.</span></li>
<li><span style="font-family: Verdana, sans-serif;"><span class="">Não há </span><span class="">NENHUMA PROTEÇÃO DE CURTO-CIRCUITO</span><span class=""> . </span>O amplificador é projetado para ser usado dentro de uma caixa de subwoofer, de modo que este não tenha sido incluído. Um curto na saída quase certamente irá destruir o amplificador.</span></li>
</ul><center style="background-color: white; color: #666666;"><b><span style="color: red;"><span style="font-family: Verdana, sans-serif;">NÃO TENTE fazer este amplificador como seu primeiro projeto</span></span></b></center><hr style="background-color: white; color: #666666;" /><span style="font-family: Verdana, sans-serif;"><b style="background-color: white; color: #666666;">Descrição</b><span style="background-color: white; color: #666666;"></span></span><div style="background-color: white; color: #666666;"><span style="font-family: Verdana, sans-serif;">Por favor note que este amplificador é <small>NÃO</small> projetado para alta potência contínua em 4 Ohms. Ele é projetado para o serviço intermitente, adequado para um sistema de subwoofer empatou (por exemplo, usando o princípio ELF - consulte a página do projeto para a informação neste circuito). Onde o poder de alta contínua é necessária, outros 4 transistores de saída são necessários, com fio da mesma forma como Q9, Q10, Q11 e Q12, e usando resistores de emissor 0,1 ohm.</span></div><div style="background-color: white; color: #666666;"><span style="font-family: Verdana, sans-serif;"><span class="">Potência contínua em 8 ohms é tipicamente mais de 150W, e ele pode ser usado na forma mostrada na potência máxima em uma carga de 8 ohms o dia todo, todos os dias. </span>Os transistores adicionais são necessárias apenas se você quiser fazer a mesma coisa em 4 ohms!</span></div><div style="background-color: white; color: #666666;"><span style="font-family: Verdana, sans-serif;">O circuito é mostrado na Figura 1, e é um design razoavelmente convencional. <span class="">Conexões são fornecidos para o SIM Interno (publicado em outro lugar nas páginas do projeto), e filtragem de RF é fornecida para proteção (R1, C2). </span>A entrada é através de uma tampa de 4.7uF bipolar, uma vez que oferece lotes de capacitância em um tamanho pequeno. Por causa da degradação, impedância de pouco ou nenhum som será aparente. <span class="">A tampa de poliéster pode ser usado se você preferir - 1uF com a impedância de entrada nominal 22k dará a-3dB freqüência de 7.2Hz, o que é bastante baixo o suficiente para qualquer sub.</span></span></div><div style="background-color: white; color: #666666;"><span class="" style="font-family: Verdana, sans-serif;"><br />
</span></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgq8GIJmgm3XV-TFTQaaZmFyQBQnl4mNRBdpO9QCMdpBVWUyjIdDu6f2rtGDUU2Ik5JLJXzWcEyn1GOg5inDOAcIdN6oNNC15a41bMKSolqCFF0Zji07E_-vLXp2Hcz2rXwN6s6FZp2v_g/s1600/%2527Esquemadeamplificadorde300WparaSubwoofer.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: Verdana, sans-serif;"><img border="0" height="364" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgq8GIJmgm3XV-TFTQaaZmFyQBQnl4mNRBdpO9QCMdpBVWUyjIdDu6f2rtGDUU2Ik5JLJXzWcEyn1GOg5inDOAcIdN6oNNC15a41bMKSolqCFF0Zji07E_-vLXp2Hcz2rXwN6s6FZp2v_g/s640/%2527Esquemadeamplificadorde300WparaSubwoofer.gif" width="640" /></span></a></div><div class="separator" style="clear: both; text-align: left;"></div><center style="background-color: white; color: #666666;"><b><small><span class="" style="font-family: Verdana, sans-serif;">Figura 1 - Esquema de amplificador básico</span></small></b><br />
<b><small><span class="" style="font-family: Verdana, sans-serif;"><br />
</span></small></b></center><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;"><span class="">O estágio de entrada é um par de cauda longa convencional, e usa uma corrente pia (Q1) no circuito de emissor. </span><span class="">Decidi usar um dissipador atual aqui para garantir que o amplificador iria estabilizar rapidamente após a aplicação (e retirada) de potência, para eliminar o temido por sua vez em "baque". </span>O amp é realmente em condições de operação razoavelmente estável com tão pouco como + / -5 volts! Note também que existem conexões para o SIM (Impairment saudável monitora), que irá indicar clipping melhor do que qualquer circuito convencional clipping indicador. Veja o Projeto Páginas para detalhes sobre como fazer um circuito SIM.</span></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">A Classe-A driver é novamente convencional, e usa um boné Miller estabilização. Este componente deve ser ou uma cerâmica 500V ou um dispositivo de poliestireno para melhor linearidade. <span class="">A carga de coletor utiliza o princípio bootstrap, em vez de um coletor de corrente ativa, já que esta é mais barato e muito confiável (além disso, eu gosto do bootstrap princípio :-)</span></span></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"></div><table style="background-color: white; color: #666666; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; width: 726px;"><tbody>
<tr><td style="vertical-align: top;" valign="top"><span style="font-family: Verdana, sans-serif;"> </span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Todos os três transistores condutor deve estar em um dissipador de calor, e D2 e D3 deve estar em bom contato térmico com o dissipador de calor driver. <span class="">Deixar de fazer isso eo resultado será fuga térmica, eo amplificador irá falhar. </span><span class="">C11 não existe neste esquema, por isso não se preocupe em procurar por ela. </span>Foi "extraviado" quando o esquema foi preparado, e eu não percebi até que alguém me perguntou onde e o que era suposto ser. Desculpe por isso.<br />
<br />
</span></td></tr>
</tbody></table><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">É no estágio de saída que a capacidade de potência deste amp é revelado. O principal resultado é semelhante a muitos de meus outros projetos, mas com um valor mais alto do que o normal para o "emissor" resistores (R16, R17). A tensão entre essas resistências é então usado para fornecer corrente de base para os dispositivos de saída principal, que operam em plena classe B-. Em alguns aspectos, esta é uma versão "homem-pobre" do Quad famosa "corrente dumping" do circuito, mas sem os refinamentos.</span></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Embora eu tenha mostrado MJL4281A e MJL4302A produção transistores, porque são novos construtores mais vai achar que estes não são tão fáceis de obter como deveriam ser. As alternativas são MJL21193 / MJL21194</span></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"></div><div class="sites-embed-align-left-wrapping-off" style="background-color: white; clear: both; color: #666666; margin-bottom: 5px; margin-left: 0px; margin-right: auto; margin-top: 5px;"><div class="sites-embed-border-off sites-embed" style="border-bottom-color: rgb(176, 189, 204); border-bottom-style: solid; border-bottom-width: 1px; border-color: initial !important; border-image: initial; border-left-color: rgb(176, 189, 204); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(176, 189, 204); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(176, 189, 204); border-top-style: solid; border-top-width: 1px; border-width: initial !important; margin-bottom: 5px; margin-left: 0px; margin-right: auto; margin-top: 0px; width: 728px;"><div class="sites-embed-content sites-embed-type-adsense" style="background-color: rgb(238, 238, 238) !important; background-image: none !important; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; overflow-x: hidden; overflow-y: hidden;"></div></div></div><span style="font-family: Verdana, sans-serif;"><br style="background-color: white; color: #666666; text-align: -webkit-auto;" /></span><div style="background-color: white; color: #666666; text-align: -webkit-auto;"></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><b><small><span style="font-family: Verdana, sans-serif;">Nota: Não é mais possível recomendar qualquer transistores Toshiba, uma vez que eles são os mais comumente falsificados de todos. O 2SA1302 e 2SC3281 está agora obsoleto - se você encontrá-los, eles estão quase certamente falsos, já Toshiba não tem feito estes dispositivos desde cerca de 1999 ~ 2000.</span></small></b></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Use um padrão LED verde. Não use de alto brilho ou outras cores, como eles podem ter um slighty tensão diferente para a frente, e isso vai mudar funcionamento da pia atual - este pode ser um tipo miniatura, se desejar. Os resistores são todos 1/4W (de preferência filme de metal), exceto para R10, R11 e R22, que são os tipos de filme 1W de carbono. Todos os resistores de baixo valor (1 ohm e 0,1 ohm) é o 5W tipos wirewound.</span></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Porque este amp opera em "puro" de classe B (uma espécie de contradição de termos, eu acho), a distorção de alta freqüência será relativamente alta, e é inadequada para o alto poder de oi-fi. No final de baixa freqüência do espectro, há muitos comentários negativos, ea distorção é realmente muito bom, a cerca de 0,04% até 1kHz.</span></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Potência em 4 ohms é mais de 250W contínua, e por transientes superior a 300W facilmente. Uso de um transformador de potência grande e maciça tampas de filtro permitirá que o amplificador para entregar perto de 350W contínua, mas se você realmente quiser usá-lo assim, eu recomendo fortemente o transistor de saída adicional (ver comentários acima sobre este tema).</span></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;"><b>Considerações sobre a dissipação de energia</b><br />
que eu fiz muito barulho sobre não usar este amplificador de serviço contínuo em 4 ohms sem os transistores extra. Um cálculo rápido revela que, no pior dos casos, a tensão de saída e transistor será o mesmo - ou seja, 28V. Com 28V, corrente de carga (e transistor) é 7A, para a dissipação instantânea é, portanto, 28 * 7 = 196W. Isto significa que os quatro transistores finais fazem a maior parte do trabalho, com os outros tendo um tempo relativamente tranqüilo.</span></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Desde que eu gostaria de ser conservador, vou assumir que contribuem mais do que cerca de 1.5A (que é sobre a direita).Isso significa que eles só se dissipar 48W, com o principal O / P dissipar um pico de 74W cada. <span class="">Os transistores são especificados 130W e 150W são as alternativas, então onde está o problema?</span></span></div><div style="background-color: white; color: #666666; text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">O problema é simples - a dissipação avaliado por um transistor está com uma temperatura de 25 ° C. <span class="">Como o amplificador é utilizado, cada dado transistor interna fica quente, assim como o caso do transistor - o padrão de curvas de desclassificação</span><i><span class="">deve</span></i><span class=""> ser aplicada. </span><span class="">Adicione a isso o componente reativo como o alto-falante dirige de volta corrente para o amplificador, e torna-se muito fácil ultrapassar os limites de dissipação de dispositivo.</span></span></div><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLYX74532XtJkmuHBQMmd-_1ha0xEMpITYCvF13yH4_QNbGRIVjiPlSPwKDyjmOvoBrp1twGN4QhZkTe5sx1vd29xrjwFevFuDHUk5KTNRRBslSXqFF7no99UekVfRmU5bUIcPR_4wD34/s1600/%2527%2527Esquemadeamplificadorde300WparaSubwoofer.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: Verdana, sans-serif;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLYX74532XtJkmuHBQMmd-_1ha0xEMpITYCvF13yH4_QNbGRIVjiPlSPwKDyjmOvoBrp1twGN4QhZkTe5sx1vd29xrjwFevFuDHUk5KTNRRBslSXqFF7no99UekVfRmU5bUIcPR_4wD34/s1600/%2527%2527Esquemadeamplificadorde300WparaSubwoofer.gif" /></span></a></div><div style="background-color: white; color: #666666;"><span class=""></span></div><center><span class=""><b><small><span style="font-family: Verdana, sans-serif;">Figura 1a - Estágio de Saída Dupla</span></small></b></span></center><span class=""><span style="font-family: Verdana, sans-serif;">A Figura 1A mostra o estágio de saída dobrou, com Q9, Q10, Q11 e Q12 simplesmente repetiram - junto com as resistências de emissor. Cada estágio meia tem uma rede Zobel própria e tampas de bypass, como mostrado, pois este é o arranjo se a versão do PCB dupla é construída. Quando você tem esse transistores de potência muitos, o amp felizmente acionar uma carga de 4 ohms todo o dia - com um dissipador de calor grande o suficiente, e / ou resfriamento forçado (altamente recomendado, por sinal).</span></span><br />
<span class=""><b><span style="font-family: Verdana, sans-serif;">A Especificação Poucos e Medidas</span></b></span><br />
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<div class="sites-embed-align-left-wrapping-off" style="clear: both; margin-bottom: 5px; margin-left: 0px; margin-right: auto; margin-top: 5px; text-align: left;"><div class="sites-embed-border-off sites-embed" style="border-bottom-color: rgb(176, 189, 204); border-bottom-style: solid; border-bottom-width: 1px; border-color: initial !important; border-image: initial; border-left-color: rgb(176, 189, 204); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(176, 189, 204); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(176, 189, 204); border-top-style: solid; border-top-width: 1px; border-width: initial !important; margin-bottom: 5px; margin-left: 0px; margin-right: auto; margin-top: 0px; width: 728px;"><div class="sites-embed-content sites-embed-type-adsense" style="background-color: rgb(238, 238, 238) !important; background-image: none !important; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; overflow-x: hidden; overflow-y: hidden;"></div></div></div><span class=""><span style="font-family: Verdana, sans-serif;"><br />
As figuras a seguir são todas relativas a uma potência de saída de 225W em 4 ohms, ou 30V RMS em 1kHz, salvo indicação em contrário. <span class="">Figuras de ruído e distorção são não ponderada, e são medidos a largura de banda total. </span>Medições foram feitas usando um transformador de 300VA, com tampas de 6800 uF filtro.</span><br />
<span style="font-family: Verdana, sans-serif;">Tensão da rede foi de cerca de 4% baixo quando eu fiz os testes, então a potência será normalmente um pouco maior do que mostrado aqui, se a rede está na voltagem correta nominal.</span><br />
<table style="color: #666666; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"><tbody>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Ganhar</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">27dB</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Alimentação (contínua)</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">240W (4 ohms)</span></td></tr>
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</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">153W (8 ohms)</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Peak Power - 5 ms</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">185W (8 ohms)</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Pico de potência - 10 ms</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">172W (8 ohms)</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Tensão de entrada</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">1.3V RMS</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Ruído</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">-63dBV (1V ref.)</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">S / N Ratio</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">92dB</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Distorção</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">0,4%</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Distorção (@ 4W)</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">0,04% (1 Khz)</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Distorção (@ 4W)</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">0,07% (10 kHz)</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Taxa de variação</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">> 3V/us</span></td></tr>
<tr><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">Potência de Banda Larga</span></td><td style="vertical-align: top;"><span style="font-family: Verdana, sans-serif;">30 kHz</span><div class="sites-embed-align-center-wrapping-off" style="clear: both; margin-bottom: 5px; margin-left: auto; margin-right: auto; margin-top: 5px; text-align: center;"><div class="sites-embed-border-off sites-embed" style="border-bottom-color: rgb(176, 189, 204); border-bottom-style: solid; border-bottom-width: 1px; border-color: initial !important; border-image: initial; border-left-color: rgb(176, 189, 204); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(176, 189, 204); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(176, 189, 204); border-top-style: solid; border-top-width: 1px; border-width: initial !important; margin-bottom: 0pt; margin-left: auto; margin-right: auto; margin-top: 5px; width: 728px;"><div class="sites-embed-content sites-embed-type-adsense" style="background-color: rgb(238, 238, 238) !important; background-image: none !important; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; overflow-x: hidden; overflow-y: hidden; text-align: left;"></div></div></div><span style="font-family: Verdana, sans-serif;"><br />
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</tbody></table><span style="font-family: Verdana, sans-serif;">Estes números são bastante respeitável, especialmente considerando a intenção do projeto para este amplificador. <span class="">Embora não seria muito normal, adequado para oi-fi, mesmo aí, é duvidoso que todas as anomalias seria facilmente perceptível, exceto talvez em freqüências acima de 10kHz. </span>Enquanto o amp é, certamente, rápido o suficiente (e sim, 3V/us realmente é rápido o suficiente - o poder completo está disponível até 30kHz), a distorção vai ser um pouco alto demais.</span><br />
<span style="font-family: Verdana, sans-serif;">Note que o "pico de potência" ratings representam a potência máxima antes da descarga tampas de filtro e os colapsos de tensão de fornecimento. Eu medi estes em 5 milissegundos e 10 milissegundos. Desempenho em 4 cargas do ohm não será tão bom, como as tampas descarrega mais rápido. <span class="">A tensão de alimentação com potência zero mediu exatamente 56V, e caiu para 50.7V com força total em 8 ohms, e 47.5V com potência total em 4 ohms.</span></span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgcIN2U867XouMFV2m1FZE2lgRXDAzD_IzOh5fHd8qyf8DRJ9379tKWkjQI76EPO-NxE6OlR7XQZeXyGQIs0bVmUq2p2VhGmkYhB3jKODCOqPT94DzdbLTJ1h0VptR6-G8wueIU7XsP8Mw/s1600/%2527%2527Esquemadeamplificadorde300WparaSubwooferplaca.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: Verdana, sans-serif;"><img border="0" height="210" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgcIN2U867XouMFV2m1FZE2lgRXDAzD_IzOh5fHd8qyf8DRJ9379tKWkjQI76EPO-NxE6OlR7XQZeXyGQIs0bVmUq2p2VhGmkYhB3jKODCOqPT94DzdbLTJ1h0VptR6-G8wueIU7XsP8Mw/s400/%2527%2527Esquemadeamplificadorde300WparaSubwooferplaca.jpg" width="400" /></span></a></div><div class="separator" style="clear: both; text-align: left;"></div><center><b><small><span style="font-family: Verdana, sans-serif;">Foto do protótipo concluído</span></small></b><br />
<b><span style="font-family: Verdana, sans-serif;"><small></small></span></b><br />
<div class="sites-embed-align-left-wrapping-off" style="clear: both; margin-bottom: 5px; margin-left: 0px; margin-right: auto; margin-top: 5px; text-align: left;"><div class="sites-embed-border-off sites-embed" style="border-bottom-color: rgb(176, 189, 204); border-bottom-style: solid; border-bottom-width: 1px; border-color: initial !important; border-image: initial; border-left-color: rgb(176, 189, 204); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(176, 189, 204); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(176, 189, 204); border-top-style: solid; border-top-width: 1px; border-width: initial !important; margin-bottom: 5px; margin-left: 0px; margin-right: auto; margin-top: 0px; width: 728px;"><div class="sites-embed-content sites-embed-type-adsense" style="background-color: rgb(238, 238, 238) !important; background-image: none !important; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; overflow-x: hidden; overflow-y: hidden;"></div></div></div><b><small><span style="font-family: Verdana, sans-serif;"><br />
</span></small></b></center><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">A foto não mostra a sobreposição de componentes serigrafados, uma vez que esta é a placa de protótipo. As placas de finais têm a sobreposição (como fazem todas as placas de meus outros).</span></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Como pode ser visto, esta é a versão de placa única. Os transistores do motorista estão em uma fileira, de modo que um dissipador de alumínio de uma única folha pode ser usada para todos os três. Buracos são fornecidos na placa de modo que o dissipador de calor condutor pode ser montado com firmeza, para evitar que o transistor conduz de quebrar devido à vibração. Isto é especialmente importante se o amplificador é utilizado para um subwoofer, mas provavelmente não será necessário para um sistema montado do chassi.</span></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;"><span class="">O motorista e os principais dissipadores de calor mostrou ser suficiente para até 200W em 4 ohms com material de programa normal. </span>Os transistores de potência são montados debaixo da placa, e as cabeças dos parafusos de montagem pode ser visto no topo do tabuleiro.</span></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Enganosamente simples, não é?</span></div><hr style="text-align: -webkit-auto;" /><span style="font-family: Verdana, sans-serif;"><b style="text-align: -webkit-auto;">Fonte de Alimentação</b><br style="text-align: -webkit-auto;" /></span><table border="1" style="color: #666666; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"><tbody>
<tr><td bgcolor="#ff0000" style="vertical-align: top;"><b><span style="color: black;"><span style="font-family: Verdana, sans-serif;">AVISO: Principal instalação elétrica deve ser executada por um eletricista qualificado - Não tente o fornecimento de energia a menos que devidamente qualificado. <span class="">Defeituoso ou incorreto cablagem eléctrica podem resultar em morte ou ferimentos graves.</span></span></span></b></td></tr>
</tbody></table><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">A fonte de alimentação básica é mostrada na Figura 2. É completamente convencional em todos os aspectos. Usar um transformador de 40-0-40 V, avaliado em 300VA para uso normal. Para potência máxima contínua, um transformador de 500VA ou maior será necessário. <span class="">Isto lhe dará uma potência contínua de cerca de 350W, e potência de pico de cerca de 400W é possível com um bom transformador. </span>Lembre-se de minhas advertências sobre o uso do amp dessa maneira, ea necessidade de os transistores de saída adicional.</span></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGa2JRoFxlHBZEc36nm4jwDLPze8GAh_GF9NL85SI3Qgj5UxtdJ51ky006qAj6j4J4J7aF4SmuZfp4Jxl9HZMZOv48_nzxn-E7sxpE0kKKqlyyJOX34sQRiQ_6MN7Fq9CnLeAprz2J83I/s1600/%2527%2527Esquemadeamplificadorde300WparaSubwooferfonte.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: Verdana, sans-serif;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiGa2JRoFxlHBZEc36nm4jwDLPze8GAh_GF9NL85SI3Qgj5UxtdJ51ky006qAj6j4J4J7aF4SmuZfp4Jxl9HZMZOv48_nzxn-E7sxpE0kKKqlyyJOX34sQRiQ_6MN7Fq9CnLeAprz2J83I/s1600/%2527%2527Esquemadeamplificadorde300WparaSubwooferfonte.gif" /></span></a></div><div class="separator" style="clear: both; text-align: left;"></div><center><b><small><span style="font-family: Verdana, sans-serif;">Figura 2 - Circuito de Fonte de Alimentação Básica</span></small></b></center><div style="text-align: -webkit-auto;"><span class="" style="font-family: Verdana, sans-serif;">Para os países em 115V, o fusível deve ser 6A, e em todos os casos, um fusível do golpe lento é necessária por causa da corrente de partida do transformador.</span></div><div style="text-align: -webkit-auto;"></div><div class="sites-embed-align-left-wrapping-off" style="clear: both; margin-bottom: 5px; margin-left: 0px; margin-right: auto; margin-top: 5px;"><div class="sites-embed-border-off sites-embed" style="border-bottom-color: rgb(176, 189, 204); border-bottom-style: solid; border-bottom-width: 1px; border-color: initial !important; border-image: initial; border-left-color: rgb(176, 189, 204); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(176, 189, 204); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(176, 189, 204); border-top-style: solid; border-top-width: 1px; border-width: initial !important; margin-bottom: 5px; margin-left: 0px; margin-right: auto; margin-top: 0px; width: 728px;"><div class="sites-embed-content sites-embed-type-adsense" style="background-color: rgb(238, 238, 238) !important; background-image: none !important; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; overflow-x: hidden; overflow-y: hidden;"></div></div></div><span style="font-family: Verdana, sans-serif;"><br style="text-align: -webkit-auto;" /></span><div style="text-align: -webkit-auto;"></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">C1 deve ser dimensionado para 240V AC (ou 120V AC) a operação - não use tampões padrão 250V DC em qualquer circunstância, uma vez que irá falhar, e R1 vai explodir! Esta não é a intenção de ser humor - isso é fato! C1 e R1 podem ser omitidos na maioria dos casos, e se você não pode obter uma corrente nominal do capacitor eu sugiro que você não instalar esses componentes.</span></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">A tensão de alimentação pode vir a ser maior do que cotou em não carrega, e menos em plena carga. Isso é totalmente normal, e é devido ao regulamento do transformador. <span class="">Em alguns casos, não será possível obter o poder avaliado se o transformador não adequadamente avaliado.</span></span></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Retificadores ponte deve ser tipos 35A, e capacitores de filtro deve ser avaliado em um mínimo de 63V. Fiação precisa ser de calibre pesado, eo DC deve ser tomada dos capacitores - não a partir da ponte retificadora.</span></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Embora apresentado com 4.700 uF capacitores de filtro, os maiores podem ser usados. Nada além de 10.000 uF é muito caro, e não vai melhorar o desempenho em qualquer grau, vale a pena. Provavelmente o melhor é usar duas tampas de 4700 uF por lado (quatro no total). Isso irá realmente funcionar melhor do que um dispositivo único uF 10.000, e será mais barato também.</span></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;"><b>NOTA:</b> É essencial que os fusíveis são utilizados para o fornecimento de energia. Enquanto eles não vão parar o amplificador de falhar (sem fusível sempre faz), eles vão evitar danos catastróficos que resultariam de não proteger o circuito de sobre-corrente condições. Fusíveis podem ser montados em porta-fusíveis ou podem ser tipos de inline. Estes últimos são preferidos, como os cabos de alimentação pode ser o mais curto possível. Acesso a partir de fora do gabinete não é necessário - se o golpe fusíveis, o amplificador é quase certamente danificado.</span></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;"><br />
</span></div><div style="text-align: -webkit-auto;"><span style="font-family: Verdana, sans-serif;">Fonte:<a href="https://sites.google.com/site/amplificatoare/300w-subwoofer-power-amplifier" style="text-align: left;">https://sites.google.com/site/amplificatoare/300w-subwoofer-power-amplifier</a></span></div><br />
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</span></span>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com3tag:blogger.com,1999:blog-3413928269858245265.post-38448485281034680412011-12-31T05:14:00.002-02:002011-12-31T05:14:00.391-02:00Transmissor de fm com BF494<div class="separator" style="clear: both; text-align: left;"><span style="background-color: white; font-family: Verdana, sans-serif;">Esta é a configuração mais simples para um transmissor de FM. O transistor Q1 BF494 atua como elemento ativo do oscilador formado por Q1, C3, C5 e L1. A potência é baixa e deve atuar num espaço de 300 metros no máximo, se for em um local com baixa verticalização. O projeto custa por volta de R$60</span></div><div class="separator" style="clear: both; text-align: center;"><a href="http://brasil.indymedia.org/images/2006/04/350103.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><span style="background-color: white; color: black; font-family: Verdana, sans-serif;"><img border="0" src="http://brasil.indymedia.org/images/2006/04/350103.jpg" /></span></a></div><div class="separator" style="clear: both; text-align: left;"></div><div style="text-align: -webkit-auto;"><span style="background-color: white; font-family: Verdana, sans-serif;">Transmissor FM</span></div><div style="text-align: -webkit-auto;"><span style="background-color: white; font-family: Verdana, sans-serif;"><br />
</span></div><div style="text-align: -webkit-auto;"></div><div class="articlebody" style="text-align: -webkit-auto; width: 600px;"><span style="background-color: white; font-family: Verdana, sans-serif;">Detalhes</span><br />
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<span style="background-color: white; font-family: Verdana, sans-serif;">L1 pode ser considerada a parte mais difícil do circuito, ela é constituída de 4 espiras de fio 22AWG sem núcleo, o que equivale a 4 voltas de um fio rígido em uma forma tal como uma caneta ou lápis.</span><br />
<span style="background-color: white; font-family: Verdana, sans-serif;">O trimer C5 é um trimmer comum de 20pF a 50pF, os de porcelana obtém bons resultados. A antena deve se soldada através de um fio soldado a uma das espiras centrais de L1.</span><br />
<span style="background-color: white; font-family: Verdana, sans-serif;">A tensão de alimentação pode ser de 3 a 6 volts obtidos com 2 a 4 pilhas pequenas.</span><br />
<span style="background-color: white; font-family: Verdana, sans-serif;">O microfone MIC1 é um microfone de eletreto, mas pode ser substituído por um microfone comum ou outro sinal de áudio.</span><br />
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<span style="font-family: Verdana, sans-serif;"><span style="background-color: white;">Fonte:</span><a href="http://brasil.indymedia.org/images/2006/04/350103.jpg">http://brasil.indymedia.org/images/2006/04/350103.jpg</a></span></div><br />
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</b></span>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0tag:blogger.com,1999:blog-3413928269858245265.post-2653383916974662152011-12-31T04:14:00.000-02:002011-12-31T04:14:01.509-02:00INDICADOR DE NÍVEL DE SOM STEREO<div style="line-height: 18px; margin-bottom: 1em; margin-top: 0.4em; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: center;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><img alt="LED INDICADOR DE NÍVEL DE SOM STEREO para amplificador de áudio" class="alignnone size-full wp-image-871" height="168" src="http://www.electronicecircuits.com/wp-content/uploads/2009/11/LED-STEREO-SOUND-LEVEL-INDICATOR-for-audio-amplifier.jpg" style="border-bottom-color: rgb(231, 232, 230); border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-bottom-style: solid; border-bottom-width: 1px; border-color: initial; border-image: initial; border-left-color: rgb(231, 232, 230); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(231, 232, 230); border-right-style: solid; border-right-width: 1px; border-style: initial; border-top-color: rgb(231, 232, 230); border-top-left-radius: 4px; border-top-right-radius: 4px; border-top-style: solid; border-top-width: 1px; margin-bottom: 4px; margin-left: 10px; margin-right: 10px; margin-top: 4px; padding-bottom: 3px; padding-left: 3px; padding-right: 3px; padding-top: 3px;" title="LED INDICADOR DE NÍVEL DE SOM STEREO para amplificador de áudio" width="354" /></span></span></div><div style="line-height: 18px; margin-bottom: 1em; margin-top: 0.4em; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: center;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span id="more-870" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"></span><strong style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">LED INDICADOR DE NÍVEL DE SOM ESTÉREO PARA AMPLIFICADOR AUDIO</span></span></strong><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;">Muitos circuitos podem ser concebidos como indicadores de nível usando um comparador de IC ou transistores, mas estes são caros e complexos e também consome muito tempo. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;">Este circuito remove toda a complexidade, utilizando um único TA7666p IC. </span><span class="" style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;">LEDs são usados como um indicador de energia. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;">LEDs de cores diferentes podem ser usados para ambos os canais. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;">Pode-se também usar um monitor LED bargraph. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;">Os sinais de entrada deve ser dada a partir de pré-amplificadores. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;">Caso contrário, os LEDs não vai brilhar em volumes baixos.</span></span></span></div><div style="line-height: 18px; margin-bottom: 1em; margin-top: 0.4em; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><img alt="LED STEREO som circuito INDICADOR DE NÍVEL para diagrama de circuito amplificador de áudio" class="alignnone size-full wp-image-875" height="405" src="http://www.electronicecircuits.com/wp-content/uploads/2009/11/LED-STEREO-sound-LEVEL-INDICATOR-circuit-for-audio-amplifier-circuit-diagram.jpg" style="border-bottom-color: rgb(231, 232, 230); border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-bottom-style: solid; border-bottom-width: 1px; border-color: initial; border-image: initial; border-left-color: rgb(231, 232, 230); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(231, 232, 230); border-right-style: solid; border-right-width: 1px; border-style: initial; border-top-color: rgb(231, 232, 230); border-top-left-radius: 4px; border-top-right-radius: 4px; border-top-style: solid; border-top-width: 1px; margin-bottom: 4px; margin-left: 10px; margin-right: 10px; margin-top: 4px; padding-bottom: 3px; padding-left: 3px; padding-right: 3px; padding-top: 3px;" title="LED STEREO som circuito INDICADOR DE NÍVEL para diagrama de circuito amplificador de áudio" width="608" /></span></span></div><table border="0" style="border-bottom-color: rgb(217, 217, 217); border-bottom-style: solid; border-bottom-width: 3px; border-left-color: rgb(217, 217, 217); border-left-style: solid; border-left-width: 1px; height: 127px; margin-bottom: 1em; margin-left: 0px; margin-right: 0px; margin-top: 0.5em; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; width: 220px;"><tbody style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td colspan="2" style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">LISTA DE PEÇAS</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R1-R10</span></span></td><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">1k</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R11</span></span></td><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">15kΩ</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">R12</span></span></td><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">15kΩ</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C1</span></span></td><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">0.1μF</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C2</span></span></td><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">0.1μF</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C3</span></span></td><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">1μF 16V</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">C4</span></span></td><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">1μF 16V</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">D1-D10</span></span></td><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">10 LEDs</span></span></td></tr>
<tr style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">IC1</span></span></td><td style="border-right-color: rgb(217, 217, 217); border-right-style: solid; border-right-width: 1px; border-top-color: rgb(217, 217, 217); border-top-style: solid; border-top-width: 1px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0.2em; padding-left: 0.4em; padding-right: 0.4em; padding-top: 0.2em; text-align: left;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">TA7666P</span></span></td></tr>
</tbody></table><div style="line-height: 18px; margin-bottom: 1em; margin-top: 0.4em; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Se você tem sistemas mono, os sinais devem ser dadas em ambos os canais. </span><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">A entrada é dada por meio de dois capacitores de 4,7 mF e dois resistores de 18k para os pinos 1 e 16, respectivamente.</span></span></div><div style="line-height: 18px; margin-bottom: 1em; margin-top: 0.4em; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><img alt="TA7666P som estéreo Indicador do nível de IC" class="alignnone size-full wp-image-873" height="188" src="http://www.electronicecircuits.com/wp-content/uploads/2009/11/TA7666P-stereo-sound-level-indicator-ic.jpg" style="border-bottom-color: rgb(231, 232, 230); border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-bottom-style: solid; border-bottom-width: 1px; border-color: initial; border-image: initial; border-left-color: rgb(231, 232, 230); border-left-style: solid; border-left-width: 1px; border-right-color: rgb(231, 232, 230); border-right-style: solid; border-right-width: 1px; border-style: initial; border-top-color: rgb(231, 232, 230); border-top-left-radius: 4px; border-top-right-radius: 4px; border-top-style: solid; border-top-width: 1px; margin-bottom: 4px; margin-left: 10px; margin-right: 10px; margin-top: 4px; padding-bottom: 3px; padding-left: 3px; padding-right: 3px; padding-top: 3px;" title="TA7666P som estéreo Indicador do nível de IC" width="320" /></span></span></div><ul style="line-height: 19px; margin-bottom: 1em; margin-left: 0px; margin-right: 0px; margin-top: 0.4em; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><li style="list-style-position: outside; margin-bottom: 0px; margin-left: 2em; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Adequado para o condutor LED estéreo</span></span></li>
<li style="list-style-position: outside; margin-bottom: 0px; margin-left: 2em; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Vasta gama de tensão de alimentação: V </span></span><sub style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">CC</span></span></sub><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"> = 6V a 12V</span></span></span></span></li>
<li style="list-style-position: outside; margin-bottom: 0px; margin-left: 2em; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Baixo atual Quiscent: I </span></span><sub style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">CCQ</span></span></sub><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"> = 4mA (típico) na V </span></span><sub style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">cc</span></span></sub><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"> = 9V</span></span></span></span></li>
<li style="list-style-position: outside; margin-bottom: 0px; margin-left: 2em; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Ganho de Tensão variável Por causa do Amplificador Inversor</span></span></li>
<li style="list-style-position: outside; margin-bottom: 0px; margin-left: 2em; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span class="" style="background-color: white; font-family: Verdana, sans-serif; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Arranjo fácil para Dual Driver 10 LEDs por Conexão Series de TA77666P e TA7667P</span></span></li>
</ul><div><span style="background-color: white;"><span style="font-family: Verdana, sans-serif;"><span style="line-height: 19px;">Fonte:</span><a href="http://www.electronicecircuits.com/electronic-circuits/led-stereo-sound-level-indicator">http://www.electronicecircuits.com/electronic-circuits/led-stereo-sound-level-indicator</a></span></span></div>Samuelhttp://www.blogger.com/profile/02706938152183523000noreply@blogger.com0