An Altium Designer PCB that repurposes the low-voltage rails of an ATX power supply as a compact bench supply with an adjustable output, two fixed 5 V USB ports, and onboard voltage monitoring.
- Accepts ground, 5 V, and 12 V rails from an ATX power supply.
- Routes the regulated 5 V rail to two USB-A output connectors.
- Uses an LM317T adjustable regulator and potentiometer for the variable output.
- Provides a screw-terminal output and a three-pin digital-voltmeter connection.
- Includes a power indicator, protection diode, schematic, PCB layout, and 3D renders.
The 12 V ATX rail feeds the LM317T stage. The potentiometer sets the regulator feedback ratio, producing an adjustable low-voltage DC output at the terminal block. The fixed 5 V rail is routed independently to the two USB connectors. A panel voltmeter header monitors the adjustable output, while the indicator LED confirms that the board is powered.
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├── altium/ Altium project, schematic, and PCB source
├── assets/ Schematic, layout, and 3D render images
├── CONTRIBUTING.md
├── LICENSE
└── README.md
Open altium/Atx power supply.PrjPcb with Altium Designer. The PCB document is PCB2.PcbDoc and the schematic source is Sheet2.SchDoc.
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This repository is a portfolio design artifact and prototype reference. Recompile the project, review component ratings, run a fresh electrical-rule/design-rule check, and verify the output under load before fabrication or connection to valuable equipment.
Only the isolated low-voltage DC rails of an ATX supply are in scope. Do not open or modify the mains side of an ATX power supply unless you are qualified to work with hazardous voltages.
Copyright © 2026 ennap3a. All rights reserved. See LICENSE.