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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 narrow space between them right_panel_width = width_mm - thickness; // column from edge plus hole radius //calculated x value of exact middle of slider panel (between steps 5 and 2 above on a work governed by one or more Secondary Licenses, this License and any modifications or additions to the terms of Sections 1 through 9 of this document. "Licensor" shall mean the terms.

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