Wolfgang Egger
Hard- & Software, Berlin
Module Build Logs

hardware diaries, step by step

Watasoge Building Log Watasoge Building Log Building a digital wavetable module on the STM32G431KB — from the first wavetable to firmware on the board. Pulser Building Log Pulser Building Log A tight Eurorack clock on the RP2040 — PIO pulse generation, tempo control, display and CV outputs.
Software & Architecture

the fracanto framework series

Fracanto Architecture Fracanto Architecture The 3-tier architecture of the fracanto CAN-bus synthesizer framework. Fracanto Vtable Pattern Fracanto Vtable Pattern The vtable design pattern: polymorphism and type erasure in plain C. Fracanto Dependency Injection Fracanto Dependency Injection How dependency injection keeps drivers swappable and firmware testable. Clean Fracanto Clean Fracanto Clean Architecture, SOLID, DRY and KISS — applied to an embedded C framework.
Reference

look things up

CV Input Signal Types CV Input Signal Types A reference to 20 control-voltage input signal types in the Eurorack world — from triggers to feedback CV. Don Lancaster's Books Classic electronics literature: the TTL and CMOS cookbooks.
Method

how I work

Agentic Coding Agentic Coding A dual-repo workflow with project and Zettelkasten — using Claude Code with long-term memory. Kicking the CAN Kicking the CAN A CAN-bus experiment with agent-driven development — STM32, Raspberry Pi and the bugs in between.
I'm Wolfgang — I build open-source Eurorack modules in Berlin and take commissions for custom modules and embedded firmware.
Work with me Get in touch