ATX Power Cube – DC Bench Power Supply from Dell N350P-00 PSU

This custom 3D-printed case is designed to turn a Dell N350P-00 ATX power supply into a compact, multi-output DC bench power cube. The idea was to make a clean and organized way to repurpose an old PSU into a power supply for project circuits. The design includes space for USB fast charging, fuse protection, banana plugs, and a step-up converter.

The case fits the Dell N350P-00 snugly but can be adapted for similar ATX power supplies.

Note: 

ATX power supplies involve high voltage. Be sure to understand the risks and follow safety precautions when modifying or using one.

There are many tutorials online, so if you're new to this, you’ll find plenty of guides to help you safely set one up. A lot of inspiration came from Crazy Tester, who has a great video walking through how to build an ATX bench supply. 

Cloth pieces were used to mask the holes

Features:

• 3.3V / 5V / 12V Outputs from ATX rails
• Dual USB QC 3.0 ports with LED voltage readout
• Adjustable DC output via step-up/down converter
• Power-on indicator LED
• Toggle switch with ON/OFF plate
• Fuse protection for each output

Components Used and their dime:

• Power Supply Base Unit: Dell N350P-00 ATX PSU
• Step-up Converter Module: SK60/SK120 Adjustable Power Module
• Aluminum Power Resistor: 50W-8R Metal Resistor
• Copper Crimp Terminals: Crimp Connectors
• Barrier Terminal Block: Wire Connector Strip
• Glass Fuses (5x20mm): Assorted Fuse Kit
• Fuse Holders: Panel Mount Fuse Housing
• Banana Sockets (4mm): Binding Post Connectors
• USB QC3.0 Module: Dual USB Charger with Voltage Display
• Toggle Switch: ON/OFF Switch with Plate
• Standard LED: 5mm LED + appropriate resistor