Design -

A scrap ATX power supply for a personal computer was obtained. The wires to the pins were cut, and bundled by rubber-bands according to color. Each power supply has different voltages for each color so I obtained the wiring schematic and figured out which lines were desired and which were not. A ghost lead was drawn to a resistor and then to an red L.E.D. in series with a SPST switch. The 12V lines were bundled and soldered to a bannana post. All connections covered in electrical tape. The unused connections were cut flat, wrapped in electrical tape, and laid to the side. Similarly with the 3V leads and the returns. Testing via multimeter provided a ~12.5V post and a ~3.2V lead. To this some wire was connected to bannana plugs on one end and an aligator clip on the other. The aligator clip is used to connect to electrodes for electrolysis. In use the negative and positive aligator clips should never directly touch or the circuit will short, this is the case for many of the similar designs I have seen as well.

Pictures -

click on the image thumb-nails to view the photo-graph

Dangerous?

It is generally considered unsafe to modify electronics. With good reason in many cases, this project included. Though I have had no problems with this design as of yet, it would be a good idea to implement a fuse. It works suitably for basic electrolysis experiments.

References -

Will be updated.