Recent Projects

Hacked sandals for running fast & long.

Full-bridge rectifier using base-collector PN junction

* No magic here. But I show that LEDs light up from tiny currents induced by electric fields around us, with no further electronics needed.

A 64-knob virtual-analog synthesizer on Raspberry Pi Pico 2 — fully tactile, no menus, real-time control.

A mini project for a mini lathe! An indexing plate to allow the chuck to be accurately stepped round in specific increments.

RNS on FPGA: Revisiting an Unusual Number System for Modern Signal Processing

Give your Microprofessor MPF-1B (and other machines) a versatile SD card interface - no more cassettes!

SRAM Emulator and SD Card Interface for Vintage Single Board Computers (such as the Heathkit ET-3400, Lab-Volt 6502, and Microprofessor)

A journey to explore and better understand the Multitech Microprofessor machines in my retro computer collection

RetroChallenge 2025/10 Blog

Bring true hi-fi audio to your smart home

XiAleste Next is an 8-bit home computer, which is compatible with software for the Amstrad CPC6128 released on 13 June 1985

Built a smart Li-ion charger with 10-LED fuel gauge. Features BQ24075 for charging & LM3914 voltage monitoring. Full build guide available!

AI Chat & MCP Control | Hacker Protocol Exploration | Arduino-like Extend GPIO | Desktop Gadgets｜Open-source SDK

Jade is not just another DOOM engine, because right now, JADE doesn't even play DOOM. But maybe someday, it will on an FPGA or "NOR machine"

The desktop microfactory of toilet tissue from recycled paper