Switching a High Power & Low Power Load Together??

Discussion in 'General Electronics Chat' started by joe426, Jan 28, 2012.

  1. joe426

    Thread Starter Active Member

    Aug 11, 2009
    I have a PCB which is powered by 5v @ 1A and a motor pack which is powered by 50v @ 25A. Is it a good idea to switch these both "on" at the same time using a DPST switch such as this one? Or would there be a LOT of noise? Thanks!
    Last edited: Jan 28, 2012
  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
    It is possible to switch both supplies with one switch. If it can cause any problems depends on your application and layout/wiring.
  3. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    generally not a good idea to combining sources. Your PCB will be sorrily messed up if there's a short at the switch. Your switch may be more than adequate, but in the practical world, shorts often happen due to improper strain relief, poor connections, etc.