USB - DC JACK Connection

Discussion in 'General Electronics Chat' started by scuba, Jul 22, 2014.

  1. scuba

    Thread Starter New Member

    Jul 22, 2014
    3
    0
    Hi everyone,

    I have two different voltage suppliers. One from USB and another one from the DC JACK. I want to prevent a situation of short-circuit só I'm implementing this small logic based on the last posts.

    From what I have read the logic its ok but imagine if the DC jack is not plugged we have a short-circuit there, right?

    Many Thanks,
    scuba
     
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,771
    971
    Typically all you need to do is "diode OR" the multiple power inputs.. Assuming the voltage drop of the diodes is acceptable. I typically use Schottky diodes..
     
  3. scuba

    Thread Starter New Member

    Jul 22, 2014
    3
    0
    Thanks mcgyvr!

    Where do you connect the schottky?
     
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