Benchtop ATX Power Supply Breakout Board

A computer power supply already delivers exactly the rails - 3.3V, 5V, and 12V - most electronics projects need for testing and prototyping, but its 24-pin ATX connector is designed to plug into a motherboard, not to safely hand voltage to a breadboard. This breakout board solves that mismatch, plugging directly into the ATX connector and breaking each voltage rail out to individually fused binding posts that accept standard banana plugs or bare wire.

A replaceable 5A fuse on every output channel means a wiring mistake or short circuit on the bench blows a cheap, easily-replaced fuse rather than damaging the supply or the project being tested, a real safety margin over wiring directly into a PSU's output cables. An onboard power indicator and switch let it double as the on/off control for the repurposed PSU, and four copper standoffs keep the board stable on a workbench rather than sliding around.

Common uses are turning a spare or surplus computer PSU into a legitimate benchtop power supply, powering multiple simultaneous electronics projects from separate fused rails, and general electronics prototyping needing several stable voltage rails without buying a dedicated bench supply.