Re: Modding an atx psu

Thank you kaboom, first useful reply...
I was actually planning to use the 5v winding too, to basically have dual outputs 5-10v and 12-25v. If I use the same number of turns on the output inductor as was originally used (except rewind with a few strands of 24gauge in parallel), should I be fine? And approximately what capacitance should the output caps be?
Now that I mentioned that I was planning to use both windings, is it really worth it to rewind the transformer?

I do intend to rebuild the whole secondary, to just have 5 wires coming...

Re: Modding an atx psu

I just bought it...

I want to mod this atx psu I got (it's a logisys ps480d) to make a variable supply that outputs about +/- 5-25v at 15-20 amps. The schematic seems to be pretty similar to [URL="http://www.eejournal.org/wp-content/uploads/2010/10/PC-SMPS-494-LM339-schematic1.gif"]this[/URL]. My plan is:

desolder basically the whole secondary side (including the main transformer),
reconnect the primary of the main transformer by soldering wires to the board and the transformer,
rectify and filter the output with properly rated schottky diodes and a pi filter,
make a...