I just did this. I used this site as a reference, although there are several to be found by Googling. Below is a picture of how mine turned out. I added the binding posts, the switch, the labels on top, and the LED. The hardest part was cutting oval holes for the binding posts so they won't rotate.Anyone have the schematics on using a pc atx power supply ,for a bench power supply and any idea on the usual amp load rating they put out, i'm lookin for a cheap way to power my mobile ham radio thanks guys.
I missed this first time around. I did a search for that article online - the first part is available for free here:If you need more than 8 or 9 amps (I'm guessing you do for a mobile Ham rig), then you may have to rewind the transformer and modify the voltage sense circuits. Silicon Chip issue October 2003 has all the details, involving paint stripper for getting the cores apart, rewinding the primary (40 turns) and the secondary (10 turns bifilar with centre tap) and providing the correct signals and voltages to the TL494 PWM controller. They rate this at 13.5 volts @ 17 amps.
BEWARE however, some nasty voltages doth exist on thee primary side of this PSU.... lethal ones at that.
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