The big difference is that I decided I didn't want to destroy my ATX power supply in the conversion. Another advantage is that you can just plug in a new power supply if the old one goes caput.
Drill and bits
Screwdriver ( for taking project box apart)
Desoldering iron (optional)
Label maker (optional)
A lighted 12V switch
3/4" strain relief
ATX connector (purchased or scavanged)
Miscellaneous heat shrink tubing sizes
Some wire 14-20 Ga (colors matching standard ATX if possible)
Step 1: Obtain an ATX Motherboard Connector
Desoldering components can be tricky, so take your time. The easiest way I have found is to first flood all the pads with as much solder as they'll hold. This allows me to heat the entire pad and pin evenly with the desoldering iron. I use a simple Radio shack model with a squeeze blub.
Step 2: Connect the Neccessary Wires to the Connector.
Pinouts for the ATX connector can be found at:
The pinout is a little wierd, I think it was dreamed up by somebody who wasn't very familiar with electronics. Pin 1 and 11 are at the same end. Ditto for pins 10 and 20.
What I did to avoid confusion was to plug the connector into the power supply and note the color of the wires . Then I soldered wires to the following pins
Pin Standard Color My Color Use
1) Orange Orange +3.3V
7) Black Black GND
10) Yellow Yellow +12V ( I solderd two wires to this pin)
12) Blue Solid Grey -12V
13) Black Black GND
14) Green Green Switch on
18) White Grey/Red -5V
20) Red Red +5V
To finish off the connector I bundled the wires with some heat shrink tubing.