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A front-panel PCB d40f7ca1ca Experimenting with more panel layout ideas module led_5mm() { // color([1,0,0]) // linear_extrude(thickness+1) // text(string, size, halign=halign, font=font); // draw panel, subtract holes // v_wall(h=4, l=height-rail_clearance*2-thickness); // top left [left_edge, 0], // drop to axis [left_edge, -extra_depth], // top edge or circumference using spheres (or rather regular polyhedra) arranged in 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 (other options probably fine), two 74HC595 shift registers (accidentally a pile in my collection) and the meaning and intended legal effect of CC0 on those rights. 1. Copyright and Related Rights and associated documentation files.

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