ATX PSU Bench Power Supply

thingiverse

Here's a bench power supply based on an ATX computer PSU. It can deliver high currents at +3.3V, +5V, and +12V with very stable voltage levels. Additionally, it can output -12V and, in older PSUs, -5V, although these are relatively weak and not as useful. I decided against printing the front panel and instead crafted a plastic sheet enclosure to house everything. Update 9 June, 2019: I've added schematics to bypass the weak switch issue and incorporated four 12C relays. Update 9 June, 2019: I've revised some of the label text. Update 9 June, 2019: I've uploaded images of the completed build (minus the printed front panel, unfortunately). I've also added instructions and notes. Update 8 June, 2019: I've refined the edges and holes to improve their shape. I've also included schematics and a parts list for reference.