Lab Notes

Build logs, debugging notes and project write-ups -- plus sound and video demos. Minimal, honest, and usually straight off the bench.

All notes

NULLPUNKT -- Low-end analyzer for Eurorack

2026-03-02 . Mono compatibility, phase, cancellation -- 8HP

A dedicated sub-bass analysis tool for kick+bass production: goniometer, correlation meter and frequency-banded metrics on an STM32F030 + OLED. Hardware V1 complete, firmware V1 ready.

Project Firmware Hardware

KARON -- Audio fail-safe bootloader

2026-03-02 . A/B slots, CRC, 4-FSK via WAV

A production-minded STM32 bootloader that can update firmware from a simple WAV file -- designed for "no USB" Eurorack reality. Notes on modulation, framing, sync, and the usual analog frontend surprises.

Project Firmware

Hunting down a phantom

2026-03-02 . State machines, off-by-one, the receiver gaslighting you

A classic embedded horror story: sync appears one symbol early -- consistently -- and why that's actually a clue.

Debug Firmware