Power Supply Conversion

If you’re a DIY electronics guy then you’ll probably need a good power supply.  I found some great articles on how to do it and I’ve decided to throw my hand in and give it a go.  The results are actually not bad.  After some frustrating moments I finally have a clean power supply.


I am not a professional engineer.  I don’t really know that much about anything.  I don’t suggest you do anything I’ve documented here.  In fact it will probably kill you so don’t even think about it.  If you do I’m not responsible.  Now since that is over lets get on with it.


Convert an existing ATX power supply to work as a generic desktop power supply.

Parts & Tools


  • Solder Iron & Solder
  • Multi Meter
  • Wire Snips
  • Drill (capable of drilling through metal) & Drill Bits
  • Screw Driver
  • Blow Dryer / Air Heater / Lighter
  • Magic Marker or Label Maker


  • Heat Shrink Wire Seals
  • Binding Posts (Make sure they are fully insulated so that the ATX case doesn’t become charged)
  • Old ATX Power Supply
  • LED
  • Switch


  • Safety First
    • Unplug the power supply
    • Ensure that there is no residiual power in the device
  • Open the power supply
  • Locate and measure the voltages of the wires
  • Cut and secure any unnecessary wires
  • Drill holes for the binding posts, LEDs, and switch
  • Install the binding posts, LED and switch
  • Solder wires to the appropate binding posts
  • Label the binding posts
  • ****CAREFUL**** Plug in the power supply after ensureing that everything is safe.
  • Measure the voltage and current going to the binding posts
  • Test the switch
  • Close the case
  • Test everything again
  • (Optional) Install the Adjustable Power Supply


  • The best ATX Power Supply Mod, http://www.instructables.com/id/The-Ultimate-ATX-Power-Supply-Mod-With-USB-Chargin/?ALLSTEPS
  • Great Article on Electronics and power supplies, http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=57&page=1
John Rizzo
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