Variable Bench Power Supply (ATX)

thingiverse

Human: A Bench Power Supply conversion with a 10A max variable voltage output. Easy to print. A bit harder to assemble due to tight space, but works well once assembled. <h3>Materials</h3> * An ATX PSU with two 12v rails (like this one). * M3 Screws (4x 6mm, 2x 10mm, 4x 8mm). * M3 Standoffs (6x 6mm male/female). * M3 Nuts 8x. * Banana Socket (black/red) - 8x 4mm. * Volt/Amp Meter. * Buck/Boost Converter LTC3780. * Linear Potentiometer (D6) 500 Kohm. * LEDs 5mm - 2x. * Resistors 330ohm - 2x. * Flat Red Terminal Connectors - 2x. * Rocket Switch. * Wires (16AWG and 22AWG). * Heatshrink. * Tools (soldering iron, wire cutter, crimper, possibly hot glue gun etc). * Printed Parts. Choose either cover with fan or without. <h3>Assembly Notes</h3> <b>Be extra careful when working with ATX and high voltages! I take no responsibility for any damage caused by improper handling.</b> * Here is a wiring mockup: http://tinyurl.com/y34ol8ky * Recommend cutting off individual ATX wires and connecting 4 or 5 together to a single higher gauge wire. * Potentiometer must be wire soldered and replace existing "Volt Adjust" trimmer on the buck/boost converter. * Two standoffs need to be added on bottom side (behind fan) of ATX PSU case. These are required to fasten printed part on ATX case. * To prevent power supply from slipping, I used double-sided tape on bottom and attached some rubber mat. Definitely not required but nice to have. You can easily remix or modify left side cover to add extra stuff like USB or XT60 outputs if desired without touching the base case part. There is plenty of space behind and it's quite decoupled from the base case part.