12V PC power supply details

Here are some details of how I built my 12V PC power supply, based on Bob Blick's design.

Bob Blick has designed and built a number of interesting electronic projects. As well as building his own car MP3 player he went one step further and designed his own robust PC PSU using a 12V supply. You can read all about it here.
I have taken Bob's schematic and built my own, which just goes to prove it can be done.

Bob Blick's schematic with my annotations
A parts list or BOM (Bill of materials) (MS Excel spreadsheet file, 19KB)
My Veroboard layout. It fits on a piece of board measuring 3" x 3.5" (Actually, this link is broken. I drew the layout on 0.1" grid graph paper, but never scanned it in. You can use my photographs to help you make your own.)
A picture of the PSU before final test
A picture of the PSU tidied up after testing, and installed in the MP3 player box. I trimmed the wires from the transformer windings and added some pieces of aluminium to act as heatsinks on the TO-220 packages. I also added some 1/4" spade connectors instead of soldering the wiring harness directly to the board.

I should have made the veroboard layout a little larger, and allowed for the attachment of real heatsinks. I got the spade connectors later, and if I re-did the PSU I would ensure the spade connectors were evenly spaced and that there was a 0V connector for the output as well as the input.