ATX Bench Power Supply Converter — Lab PSU Breakout Box

Note: for all options needed: 

• 2 on/off small switches;

• 8 banana jacks (best option is 4 red and 4 black);

• 1 female USB conector;

• 1 USB fast charging module;

• 1 DC-DC Buck Boost Converter Regulator like ZK-4KX

• something like 100-200g of filament.

ATX Bench Power Supply Converter

Turn a spare ATX PC power supply into a proper bench/lab power supply. This model gives you a clean housing with labeled output terminals so you can tap all the standard ATX rails without cutting or soldering into the PSU itself.

Outputs included:

1. +3.3V

2. +5V

3. +12V

4. -5V

5. -12V

6. GND

7. Power-on/regulator terminal (positive)

8. Power-on/regulator terminal (negative)

9. 2x USB ports (standard 5V USB — optional fast-charging module can be added if you want higher-current USB output)

Build notes:

• Designed to house a standard ATX PSU — check your PSU's dimensions against the model before printing.

• Terminals 7 and 8 are used to bridge/switch the PSU on without a motherboard (jump PS_ON to GND, or wire a switch here).

• Binding posts / banana jack terminals recommended for the voltage rails so you can use standard multimeter probes and banana-to-alligator leads.

• Optional: print the 2 corner legs in TPU for a soft, non-slip, vibration-damping base. Swap filament for these parts only.

Print settings (fill in your actual settings):

• Main enclosure: PETG or ABS recommended (better heat tolerance than PLA near the PSU)

• Layer height: 0.2mm

• Infill: 20–30%

• Supports: yes

• Legs (optional): TPU, 20% infill or low infill for softness

Safety note: Mains voltage is present inside an ATX PSU. Make sure the PSU casing is fully closed and any mains wiring is properly insulated before use. This model does not include mains-safety modifications — use an unmodified, intact PSU.