Side Project’s Lab releases the PD‑64, a compact USB‑PD powered supply that replaces the bulky Commodore 64 PSU. The board draws 12 V DC from a standard wall charger, then produces the 5 V DC and 9 V AC rails the C64 requires. That simplicity solves a long‑standing pain point for owners everywhere today.

Commodore models need separate 5 V DC and 9 V AC at 50 or 60 Hz, the latter feeding the internal clock. Older supplies rely on a transformer to generate the low‑frequency AC, making them large and heavy. PD‑64 replaces that transformer with a 500 kHz signal generator and a tiny planar transformer compact.

The PD‑64 isolates the AC side galvanically, rectifies the 13 V DC output, then drives a class‑D amplifier to deliver 9 V AC at the chosen frequency. A rear switch lets users select 50 Hz or 60 Hz, while front‑side fuses protect both rails. The design also includes short‑circuit, under‑voltage, over‑voltage, and thermal shutdown.

PD‑64 supplies 5 V DC at 2 A and 9 V AC at 1 A, per the GitHub release. Schematics and 3D case files are shared, but the full board layout remains private. Hobbyists can buy the unit, download files, or build their own, making USB‑PD a modern replacement for classic C64 power supplies.