DIY Eurorack Builds

DrumFiend

Trigger to MIDI converter · Divergent Waves

MakerDivergent Waves
TypeTrigger to MIDI converter
MountingMixed
Width
LicenseProprietary (No open licence published, treat as all rights reserved)
Difficulty 🌶️ Large through-hole
DrumFiend module
Photo: Divergent Waves

Send it triggers and it sends MIDI notes to a drum machine. Default firmware maps to the DrumBrute Impact, and since it runs CircuitPython on a Teensy you can rewrite the map by plugging it into a computer. Inputs fire above 2.5V and track up to low audio rates. The assembly guide notes some small SMT parts.

Documentation

This is a third-party open-source design, listed here as a build reference. Specs are researched from public sources; check the source repo and store for the current BOM, panel, and revision before ordering parts. Corrections welcome.

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