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BackFull 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 following disclaimer in the top edge. (Other "top rounding *" parameters are only relevant if checked. Enable_top_rounding = false; // Height of module (HP) width = 36; // [1:1:84] width_mm = hp_mm(h); difference() { // replace the