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D6, D7, D8, D9, D10 | 8 "active_layer_preset": "All Copper Layers", re-re-remove the mysterious extra trace Added schmancy pcb for v2 front panel Added schmancy pcb for v2 front panel // = length of the hole to go all the way to the base panel's thickness to account for squishing // middle-bottom h rib // h_wall(h=1.6, l=right_rib_x); // 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 package registry, see the revision history.

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