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// one more 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 the larger board underneath the smaller board, for convenience Casc Out - 1K to TP5 Gate Out - Diode from rotary pin 13 - CV out // 1 for once/cont (sw15 // 2 NO Moment switches: // 1 rotary switch with 12 positions D 4.

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