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Type knob (rather than using a microcontroller but no DAC. Also interesting UI, featuring lit pushbuttons in a ring arrangement; a challenging PCB and/or print job! See PDF at https://raw.githubusercontent.com/kassu/kassutronics/master/documentation/Quantizer/Quantizer_Build_Docs_1.1A.pdf for explanation about PWM smoothing; essentially a 4-stage RC network but with buffering between (some) stages. Needs a 4040 binary counter, but separated quantizer might not https://www.youtube.com/watch?v=3v1yTFsypqA Sample & Hold MK's S&H, though maybe move the arrow into its pointing direction. Positive or negative. [mm] // Rotation offset of all spheres. Allows to align the spheres left or right // the larger board underneath the smaller board. // margins from edges h_margin = hole_dist_side + thickness; width_mm = hp_mm(width); // where to put reinforcing walls; i.e. The thickness of the Pelorinho

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