op amp in pcb

Discussion in 'The Projects Forum' started by blowouter, May 16, 2013.

  1. blowouter

    Thread Starter New Member

    Sep 28, 2012
    18
    1
    i design hand clap switch on PCB it contain mic , op amp, relay
    i try to make it as small as possible in dimensions
    is there any precautions i must care and take it into account in layout
    for noise, high voltage etc.
    i plan to make the relay side by side on board with mic and op amp
    thanks
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,087
    3,026
    I think the short answer to your question is NO. You can put the components as close together as you can handle.

    I highly suggest you post your design here for review by the experts. Is this a PCB you will build once, or is it for production?
     
  3. blowouter

    Thread Starter New Member

    Sep 28, 2012
    18
    1
  4. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,386
    1,605

    Looks green to me, with some black specks.

    The only voltage you need worry about is the one your relay makes every time you turn it off. Got catch diode?

    Did you breadboard this before committing to a PCB? That's what the pros try to do (and still go thru 2-3 spins to get it right).
     
  5. blowouter

    Thread Starter New Member

    Sep 28, 2012
    18
    1
    you mean back emf across the transistor , there is adiode reversed across the coil
    i try it on breadboard and works good but pcb not is any pcb specs i forget in this ct
     
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