Precision Adder

Maker	CATs Eurosynth
Type	Precision adder for summing 1V per octave pitch CV
Mounting	SMD
Width	2 HP
License	Proprietary (Hardware CC BY-NC-SA 4.0, noncommercial so not an open licence)
Difficulty	🔥 SMD (0805)

0805 passives. Adds octave and semitone offsets without pitch error.

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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