4047VCO

Maker	Isaac Beers
Type	Gateable triangle-core VCO
Mounting	Mixed
Width	8 HP
License	Proprietary (No licence published)
Difficulty	🔥 SMD (0805)

Triangle-core VCO built around a 4047 CMOS chip in gated astable mode. Oscillations are gateable: a trigger or gate lets one cycle complete, giving pseudo-resonant filter and on-off VCA effects, or it free-runs as a normal VCO. Six outputs (triangle, square, PWM, sub) plus lin FM, 1V/oct, gate, reset and PWM inputs, with a tuning trimmer. Boards are 0805 SMD with through-hole jacks and pots; sold as bare PCB+panel, full kit, or assembled. Around 120 USD assembled.

Links

• Maker page
• Buy: synthCube

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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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