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Elsewhere Schematics/Enlarge/Enlarge.kicad_sch | 206 Update README.md 2cb8e5eaf679e30139948d8744800b04487466fc updated C5 footprint & tracing; schematic annotation updates the potentiometer shaft clf_indicator_angle_from_notch = 0; right_rib_x = width_mm - thickness*2; // draw a "vertical" wall to mount a circuit board to, dead center // one more vertical to mount a circuit outside the full dev board (in some cases) Arduino + DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on ** https://www.instructables.com/Another-MIDI-to-CV-Box-/ yet another version Alternative: CV from something else VCF MK's Diode Ladder VCF ~$8 in parts, mostly down to PCB edge.

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