Here are links to some resources
I am following this DIY instructable : http://www.instructables.com/id/Variable-ATX-bench-powersupply-FabLab-edition/
Various projects by others : http://www.instructables.com/id/Encyclopedia-of-ATX-to-Bench-Power-Supply-Conversi/
Info on PC power supplies : http://en.wikipedia.org/wiki/ATX
Today, I laser cut out the housing/box for this project from Birch 3mm plywood and did a partial assembly of the housing.
Had one small problem. One of the issues with cutting plywood is voids and glues. The laser did not cut all the way thru, so in process of trying to complete with a x-acto knife I broke an small area of the air intake vent/grill.
If anyone would like the AutoCAD or DXF file for this housing/box just contact me.
Part two will cover the electrical/electronic installation.