BIPO

Maker	Fihdi
Type	Dual bipolar VCA and ring modulator with lock and mix
Mounting	Mixed
Width	8 HP
License	Proprietary (CC-BY-NC-4.0, noncommercial so not an open licence)
Difficulty	🔥 SMD (0805)

Two VCAs that can be locked together for sidechaining or crossfading. Biasing the level knobs turns each section into a ring modulator. Every jack is DC coupled so it handles CV as well as audio. Three board design: an A-board, a B-board carrying the 1206 chip parts and an F-board front panel. The published gerbers and pick-and-place files let a fab assemble the surface mount side.

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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