DIY ATX Lab Bench Power Supply

prusaprinters

<p>I wanted to convert an old ATX PSU into a lab bench power supply.<br>Since none of the designs found fullfilled my needs I created my own design.</p><p>The features are:</p><ul><li>3.3V, 5V, 12V, and GND rails of PSU attached to banana plugs</li><li>Integrated buck-boost converter to also support other voltages</li><li>Two status leds</li><li>One additional switch to turn PSU on/off</li></ul><p>Parts required:</p><ul><li>1 (old) ATX PSU</li><li>1 buck-boost converter, I used this ARCELI Buck Boost Converter (<a href="https://www.amazon.de/gp/product/B07MY399GQ?tag=thingiverse09-20">https://www.amazon.de/gp/product/B07MY399GQ</a> - when using a different one the dimensions may differ)</li><li>8 banana plugs (4 red ones, and 4 black ones)</li><li>10 M3 nuts</li><li>10 M3 screws (I used 8 mm)</li><li>1 M3/M4 screw + nut to attach the front panel at the bottom. For this I drilled a hole in the printed part (front_plate.stl).</li><li>Screws to mount psu_cover.stl and fan grill should be already available from ATX PSU</li><li>Crimp connectors for wires (ring terminals to attach to banana plugs, ferrules for screw terminals)</li></ul><p>P.S.: I attached fusion360/ step files in case you need to change some dimensions for your PSU you are using / want to use a different buck-boost converter / you want to improve the design etc ;)</p>