DekuNukem’s ATX4VC converts modern PC power supplies for use with vintage hardware – and more

Pseudonymous manufacturer and vintage computing enthusiast “dekuNukem” has built a board that aims to make restoring old computers easier – by converting the output of a standard modern ATX power supply to something more suitable: ATX4VC.

“Power supplies are a major point of failure in older computers today. These early power supplies were heavy, inefficient, hot, and [are] sometimes explosive,” says dekuNukem of the problem the project seeks to solve. “After 40 odd years, many don’t work, or worse, could cause damage with out-of-spec voltages. ATX4VC is designed to replace them with much more reliable modern ATX power supplies, and as a tool to help test and diagnose older computers.

Originally built as part of the RGBeeb projectwhich took the inner workings of a vintage 1980s BBC Micro home computer and rehoused it in a modern PC chassis with RGB lighting, the ATX4VC takes the 24-pin cable from any modern ATX power supply and splits into fused +12V, +5V, +3.3V outputs and unfused low current -5V and -12V outputs suitable for vintage gear.

As additional features, the ATX4VC board also includes two four-pin headers for the cooling fans, which can be speed-controlled via pulse-width modulation (PWM) under manual or temperature-sensor control when They’re paired with an optional DS18B20 probe, two headers for addressable RGB (ARGB) LED lighting, and two USB Type-C ports that provide power output and make it easy to update board firmware.

“The ATX4VC can be used to: Replace aging retro computer power supplies,” says dekuNukem. “Add cooling and lighting upgrades. Test and diagnose vintage hardware. [Or] as [a] general purpose multi-voltage bench power supply.”

The ATX4VC is now available for purchase on dekuNukem’s Tindie Store for $35.99 before volume discounts; design files and firmware source code have been published on GitHub under the permissive license of MIT.

Rosemary C. Kearney