DIY Adjustable Power Supply 12/5/3.3V

thingiverse

I needed a relatively small 12V high amp adjustable power supply for my Slot Racing Hobby. The units that are made are either too expensive or too big. I decided to make my own pulling inspiration for a friend of mine. This unit puts out 12V, 5V, and 3.3V by using an SFX Computer Power Supply. It features on/off switches for the 3.3V, 5V, and Adjustable 12V rails. There is an input (straight 12V) on the rear that you could use for anything. I use it for a LED light. The meter reads volts/amps from the adjustable 12V rail only. Can be used on 110V or 220V. Switch is on the back. Dimensions in mm: 130 x 130 x 80 Power Output Specs: 12V - 28A 12V Adjustable - 12A 5V - 12A 3.3V - 12A Parts List: 1 - SFX Power Supply - https://www.ebay.com/itm/293246094063 1 - Power Cord - https://www.ebay.com/itm/353179784910 1 - Barrel Connector Male - https://www.ebay.com/itm/224056638229 1 - Barrel Connector Female - https://www.ebay.com/itm/192754140138?var=492896033067 1 - Potentiometer 10k - https://www.ebay.com/itm/402635079986 1 - Volt/Amp Meter - https://www.ebay.com/itm/184530503071?var=692241009324 1 - Buck Converter 12A - https://www.ebay.com/itm/262561549684 3 - Red Banana Connector - https://bit.ly/3wFpfuK 3 - Black Banana Connector - https://bit.ly/2U47OXD 1 - 27Ohm Load Resistor - https://bit.ly/3xyjBfg 3 - On/Off Toggle Switch - https://bit.ly/3AZJ43u 1 - Rocker Switch - https://bit.ly/3r6vpCW 1 - Power Connector - https://bit.ly/3i3dIAm 12 - Low Profile M3 Screw 10mm Long - https://www.mcmaster.com/93070A067/ 4 - Low Profile M3 Screw 25mm Long - https://www.mcmaster.com/93070A079/ 4 - M3 Screw Pan Head - https://www.mcmaster.com/92000A114/ 8 - M3 Nut Nylon Insert - https://www.mcmaster.com/93625A100/ 6 - M3 Nut - https://www.mcmaster.com/90592A085/ 1 - 80x80mm Fan (Comes with SFX Power Supply) Thanks for Looking