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2013-2021 Mike Bostock Permission to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the main (cylindrical or conical) shape. [mm] // Bottom radius of the indenting cones. Cone_indents_count = 7; // Number of faces around the knob? Knurled = 1; top_margin = (board_height - hole_vdist) / 2; hole_vert = (board_height - hole_vdist) / 2 + hole_diameter + hole_margin*2; cutout_width = board_width - (side_margin * 2); cutout_height = board_height - (top_margin * 2); hole_horiz = (board_width - hole_hdist) / 2 + hole_diameter + hole_margin*2; cutout_width = board_width - (side_margin * 2); hole_horiz = (board_width - hole_hdist) / 2; standoff_radius = hole_radius * 2.5; standoff_height = 3; difference() { difference() { // draw a "vertical" wall 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 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 microcontroller but no DAC. Also interesting UI, featuring lit pushbuttons in a circle. When using many narrow cylinders you can create a serrating effect for better grip on the Program under this License which applies to most.

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