Variable Atx psu

Discussion in 'General Electronics Chat' started by Dodgydave, Jun 23, 2012.

  1. Dodgydave

    Thread Starter Distinguished Member

    Jun 22, 2012
    4,969
    744
    This is an atx psu that i have modified to variable output by altering the feedback path on the IC. It uses a KA7500 ic or (TL494 the same) i am getting 2Vto 10V on the 5volts supply, and 4.9V to 28V on the 12Volts supply, the videos here show how to do it, (the camera has a poor focusing so sorry for low quality).


    http://youtu.be/EYPhZAnJenA


    http://youtu.be/BuuDoS9NEDY

    http://youtu.be/rpUk9hpFQL4

    The atx is a 500W and i can get upto 26Amps on the output.:cool:
     
    pastinsain and XerxesX24 like this.
  2. XerxesX24

    New Member

    Sep 13, 2012
    14
    0
    Good idea. Might give that a try when I eventually repair my old one.

    Probably the electrolytics.

    It's old enough to be put under the "likely capacitor plague" heading.
     
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