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[mm] knob_radius_top = 10; label_font = 6; //knob_radius saw_out = [third_col, fifth_row, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_3, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_3, 0]; c_tune = [width_mm/2 + h_margin, top_row, 0]; f_tune = [width_mm/2 + h_margin, top_row, 0]; left_rib_x = 0; right_rib_x = width_mm - thickness*2; // draw a "vertical" wall to mount a circuit outside the full 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 LM13700 OTA (operational transconductance.

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