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DIY Eurorack Builds

Moduleur Brain

Raspberry Pi Pico digital module with MIDI, CV and pulse IO · Shmoergh

MakerShmoergh
TypeRaspberry Pi Pico digital module with MIDI, CV and pulse IO
MountingMixed
Width12 HP
LicenseProprietary (CC BY-NC, noncommercial so not an open licence)
Difficulty 🔥 SMD (0805)
Moduleur Brain module
Photo: Shmoergh

A blank digital slot: three buttons, two pots, six dimmable LEDs, two audio or CV inputs and outputs, pulse in and out and a protected MIDI input, all driven by an actual Pi Pico. An SDK and a growing set of firmwares cover sequencers, MIDI to CV and a lo-fi delay. Part of the Shmoergh Moduleur, a full DIY analog synth whose modules also work standalone in any Eurorack case. Split into a core PCB and a UI PCB; the core is mostly 0603 chip parts with JLCPCB gerbers and pick-and-place files, so the surface mount side can be fab assembled.

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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