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'new_footprints' (#5) from new_footprints into main 3d279dd88c Finish schematic, add PDF 2d3c489f2a More SR1 notation bacdac34d7 Add more note files from the bottom of the set screw hole's center over the base shape. Cylinder(r = shafthole_radius, h = z height, i.e. How tall the wall along the bottom of box [right_edge, -extra_depth], // bottom horizontal rib // h_wall(h=1.6, l=right_rib_x); // bottom horizontal rib // middle horizontal rib h_wall(h=1.6, l=right_rib_x); // middle horizontal rib // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // 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.

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