ATX Power Supply

For my electronics workbench and various Arduino projects, I finally decided to design this enclosure for standard ATX PC power supply to use as cheap Lab Power supply instead of cheap wall warts. Took advantage of available 12V, 5V and 3.3V. For an inspiration I used DroneBot Workshop article and basic wiring diagram, but there are many others available on YouTube.

Link to article: https://dronebotworkshop.com/atx-bench-supply/

3D printed parts:

1. Front plate
2. Front case,
3. Back case.

Other components used:

1. ATX power supply, used, but you can use new one like me if you want,
2. 6 binding posts for outputs (3 black for ground, and 3 different colors for 12V, 5V, 3.3V),
3. 2 LEDs for Power and Standby indicators (any color),
4. ON/OFF switch,
5. 2 330 Ohm resistors for LEDs,
6. 8 - 10 Ohm power resistor,
7. M3 threaded rod and 8 M3 nuts to put the case together,
8. heat shrink tube for insulation.

Please thoroughly read the DroneBot article for detailed explanation of the wiring diagram and build process. And of course, be careful when working with electricity.

Print Settings

Printer Brand: Creality

Printer: Ender 3 Pro

Rafts: No

Supports: No

Resolution: 0.2

Infill:  15%

Filament: Devil Design PLA Red

How I Designed This: Front plate is designed with 5mm holes for LEDs, 20mm hole for ON/OFF switch and 8mm holes for binding posts. Front case has a honeycomb pattern cutout for esthetics, and to reduce print time and material usage. It also provides some cooling for the power resistor inside.

If you reorient the front case you can print it without any supports, although you may wish to use supports if you want the honeycomb pattern to come out perfect. I'm extremely happy with my came out without any supports.

Category: Electronics