How to build a $20 47A power supply

[BrianG]

Originally Posted by fordman86

Ok BrianG I took off the hot swap connector like this http://sites.google.com/site/tjinguy...projects/HP47A
wondering whow would I put the 1.5k ohm in to boost volts and what watt of resistor did you use? I have 12.45 now.

Honestly, if you are getting 12.45v now, there really is no reason to mess with it. ~13.2v is not a whole lot more voltage for the work required. But if you still want to:

The pic below is the first PS I modded before I realized I didn't need as many wires, but all you need to do is attach the 1.5k ohm resistor to the red and white wires (the ground isn't needed). Resistor wattage can be your typical 1/4w.



In this pic, you can also see the jumper wires I added to turn the supply on without having to mess with the little pins.

Be aware that I cut the standalone purple and blue wires (-12v and 5v aren't used) and cut away the PCB where they attached to give me room for those white and red wires in the pic above.