I remember reading on this site, about someone who descriped with pictures how to convert a standard 200W AC-DC ATX power supply into a DC-DC power supply. I have done a lot of searches but I just can't find the right one. Anyone remember this post? I have been to Sproggy's site and that wasn't it. The person who did this, removed the AC side of the PSU and added some components. I hope someone know what I am talking about.
