Addictronics » Power Supply http://www.addictronics.com Student | Hobbyist | Pursuer of Dreams Tue, 18 Oct 2011 19:53:25 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 DIY Bench Power Supply http://www.addictronics.com/electronics/diy-bench-power-supply http://www.addictronics.com/electronics/diy-bench-power-supply#comments Sun, 10 Feb 2008 07:38:50 +0000 Adam http://www.addictronics.com/projects/diy-bench-power-supply I desperately needed a bench power supply and knew exactly what I would do. I have several computer power supplies lying around my room and chose an old 400watt to sacrifice for this purpose. I cut all of the connectors off except for one strand which I left intact. It has on it one floppy connector and two molex. The rest of the wires I separated into groups and I completely cut off any wire that wasn’t a 3v, 5v, 12v, ground, or the power wire. I cut them all off right at the circuit board so they would not short out. I used the existing grommet hole for a rocker switch which turns the unit on and off. I cut two of the vent slits out to make a hole to pass the wire through. Then I regrouped the wires again, and cut a piece of plywood the same size as the top of the power supply. Then i added 5 bolts through the board that i use as terminals. One for each voltage and two for ground. Then I insulated the underside of those bolts and attached the plywood to the top of the psu. After a quick coat of paint ( I know its not the best looking thing ever, but it works great) and some wire management I was done.

Here is the psu from above, showing the 5 terminals, power cord, and power connectors (1 floppy, 2 molex).

Overall

The rocker switch is placed in the preexisting grommet hole. Also the wires coming out the vent hole work as a great handle for lugging this around.

Side Shot

I used some duck tape to insulate the bolt heads from grounding out on the case.

On Off and Spacing

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