Here is a very useful bench power supply that I made from an old ATX supply. I will not re-iterate what has been done before (look at ATX -> Lab Bench Power Supply Conversion on Instructables for a great discussion). I made this while at college in their well furnished machine shop. The pictures are self-explanatory. I spent about $3.00 on the rocker switch and military cover. The rest was trash or free.
Power Resistors. These are 5 Ohm 10 Watt Resistors in series with one another to simulate a computer. The load is placed across the +5V (Red) and Ground.
Nice aluminum panel that I made on a very old metal punch tool. The face is riveted to the outer frame of the power supply.
Reverse. The sole purpose of the duct tape is to provide a spacer between the panel and the standoffs which could not clamp down on the thin panel. Care was taken as to make sure that the duct tape did not conduct between the posts. Best solution I had at college.
Overall shot. Unnecessary grounds and other wires were trimmed and insulated.
Non-standard voltages can be obtained by mixing the different voltage taps.
The fan was originally on the inside of the case. I replaced it with a more quiet one on the outside with a fan guard.
Nice P-Touch labels. Forgive my horrid macro shots, I'm still working on getting a lightbox.
I kept the Molex connectors so I can use it to suck away solder fumes while I work. The power dips a little low because of the fan's draw, but it does the job.