Is my 5v powersupply ok?

Discussion in 'General Electronics Chat' started by jonisonvespa, Dec 10, 2012.

  1. jonisonvespa

    Thread Starter Member

    Mar 25, 2012
    49
    0
    hi

    ive designed a power supply for 2 processors and 2 relays could someone please have a look at it to make sure it is ok or any improvements i can make to it?

    thank you
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
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    You need a 0.1µF on the output of the 1st 12V regulator to prevent oscillation.
     
  3. Biff383

    Member

    Jun 6, 2012
    49
    19
    The first two caps (470-100uf) may not last very long if they are only 16V
     
  4. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    You're right about the first one, I figure the base DC at 21VDC (look! Smoke!), the second cap should get 12V though, so it will be OK.
     
  5. KJ6EAD

    Senior Member

    Apr 30, 2011
    1,425
    363
    I'd like to see larger output filter capacitors, at least 1000μF on the 12V output and at least 680μF on the 5V output.
     
  6. jonisonvespa

    Thread Starter Member

    Mar 25, 2012
    49
    0
    thank you for the help
     
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