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Left_panel_width - right_panel_width)/2 + left_panel_width; slider_bottom = v_margin+8; module label(string, size=4, halign="center", font=default_label_font) { color([1,0,0]) linear_extrude(height) text(string, size, halign=halign, font=font); // draw panel, subtract holes // v_wall(h=4, l=height-rail_clearance*2-thickness); // top horizontal rib // h_wall(h=1.6, l=right_rib_x); // one more 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 amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on the circuit board sideways on d923559173 Go to file.

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