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OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules main 5a4e89eea6 Add position for resistor between coarse and +12V, value unknown .. Fireball VCO saw wave core.circuitjs.txt Latest commits for branch feature/seq_chaining Add CV (and knob) controlled glide to schematic 16c50fa0a8 Add pulldown resistors for reset debounce cap; formatting checkpoint before trying to add picture 9f9f6acf76 Add notes about UX component wiring 2x Sockets, all three pins need wires: glide in (j16/j17 // cv switch // steps: slider, led, switch (sw1-sw10, rv1-rv10 // mounting holes 47.1mm, distance of mounting holes distance 25mm 9-pin D-Sub connector horizontal angled 90deg THT male pitch 2.77x2.84mm pin-PCB-offset 7.699999999999999mm mounting-holes-distance 33.3mm mounting-hole-offset 33.3mm 15-pin D-Sub connector horizontal angled 90deg THT female pitch 2.29x1.98mm mounting holes to PCB edge 9.12mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 25-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.77x2.84mm, pin-PCB-offset 14.56mm, distance of mounting holes 63.5mm, distance of mounting holes 25mm, distance of mounting holes to 5mm + unplated, and revises jack footprint a3181ad06b Add correct footprints to fireball Add correct footprints to fireball 3c7abf2196 Move LED resistors next to transistors to wide

  • Add note that C12 is optional; not needed if using real TL0x4, fix pots being backwards, tighten up schematic, fit letter instead of A4 71248cb440f4d8f8daaed2a21ef26b099a9d8e65 Add note resulting from real TL0x4, fix pots being backwards, tighten up schematic, fit letter instead of A4 d8eca8dc7e Add note resulting from real TL0x4, fix pots being.

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