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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 timely manner, at a charge no more than 100k to get 1:1 between schematic and PCB, no warnings More work finding space for everything, lining things up more Make slider and LED footprints match current OpenSCAD model Checkpoint after converting most.

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