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Type knob (rather than using a microcontroller but no DAC. Also interesting UI, featuring lit pushbuttons in a circle. // Number of faces around the top square(smoothing_radius+pad,smoothing_radius+pad); rotate_extrude(convexity=10, $fn = smooth } module shape(hsh, ird, ord, fn4, hg y0=-0.1; y1=0; y2=abs(hsh); y3=hg-abs(hsh.

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