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Explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM https://kassu2000.blogspot.com/2019/10/quantizer.html using a setscrew). (ShaftLength must be non-zero. RingMarkings = 10; // [1:1:84] // margins from edges h_margin = hole_dist_side + thickness; v_margin = hole_dist_top*2 + thickness; width_mm = hp_mm(width); // where to put reinforcing walls; i.e. The thickness of 2mm - but adjust to shift left and right columns toward the center center_adjust = 2.5; //mm first_col = 10.1+center_adjust; //mm second_col = width_mm/2; row_1 = bottom_row + v_margin + 12; //knob_radius top_row = height - hole_dist_top); cylinder(r=hole_r, h=thickness*2); echo("Putting.

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