Arduino VCO

Maker	CATs Eurosynth
Type	Arduino digital oscillator with additive, chord and 2 operator FM firmware
Mounting	SMD
Width	6 HP
License	Proprietary (Hardware CC BY-NC-SA 4.0, noncommercial so not an open licence)
Difficulty	🌋 Fine-pitch SMD

Clone of HAGIWO Additive VCO, Chord VCO and FM VCO. One main board with three panel options, one for each firmware. The output stage was amplified to Eurorack levels, and the chord firmware still runs quiet.

Documentation

• Bill of materials (BOM)
• Schematic
• Fabrication files (PCBA-ready)

Links

• Source / files on GitHub
• Maker page

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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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