Budget bench supply

thingiverse

I wanted a more portable bench power supply than my existing one that I could quickly plug into a project to test without having to find banana plugs and so forth. Initially, I thought I'd have screw terminals as output but decided on loose wires or JST plugs for greater flexibility. In fact, this power supply is even more flexible than my bench supply - it delivers 4v to 28v at 2A from a single rechargeable 18650 Li-Ion battery that can be charged via USB - no mains supply required. You could easily replace the 18650 battery with a single cell lipo. TP4056 Voltmeter JST cables Boost module Battery connectors This power supply is essentially an amalgamation of my previous projects, including the battery case, DC-DC case and TP4056 case. The battery holder fits snugly inside the main case, and the lid simply snaps on top without requiring any glue. All edges are rounded for improved printing quality. The power switch and LED display fit tightly enough that they don't need glue either. Update: I eventually gave up waiting for the battery springs and opted for a lipo instead. Print Settings Printer Brand: Monoprice Printer: FlashForge Creator Pro Rafts: No Supports: No Resolution: 0.18 Infill: 15% Notes: PLA works best, while ABS worked okay but due to ABS shrinkage the battery holder needed sanding to fit in the box properly.