Variable Atx psu

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

  1. Dodgydave

    Thread Starter Distinguished Member

    Jun 22, 2012
    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).

    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
    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.