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CLUBBING TWO CIRCUITS

Discussion in 'General Electronics Discussion' started by vinod chandran, Jun 24, 2012.

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  1. vinod chandran

    vinod chandran

    192
    2
    Jun 21, 2011
    Hi all, After a short gap i am back to this group. Now i am planning to club two circuits. One is an automatic 12V SLA charger circuit and the other is an automatic emergency lamp circuit. I think this may be complicated, so i attached an image here. Please look this image. I just marked some red X in this picture. The charger section of the second circuit will be dettached later. I just want to know about the value of the resistors behind BD 140 and all the LEDs. And plz tell me how many LEDs can i include in this lamp ?.
    -vinod chandran
     

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  2. mostafa_naderi

    mostafa_naderi

    6
    0
    Jun 7, 2012
    number of dependence on transistor . you can use IRF series (IRF 9640)
    and value of the resistors behind TR Remains the same
     
  3. vinod chandran

    vinod chandran

    192
    2
    Jun 21, 2011
    Hi mostafa,
    I can't understand what is this IRF 9640. i request you to clarify that.
    with respect
    -vinod chandran
     
  4. davenn

    davenn Moderator

    13,866
    1,958
    Sep 5, 2009
    its a transistor .... specifically, a P channel Power MOSFET

    Dave
     
  5. vinod chandran

    vinod chandran

    192
    2
    Jun 21, 2011
    Hi davenn, thanks. let me try.
     
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