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0]; pwm_pot = [input_column + h_margin/2, bottom_row, 0]; c_tune = [width_mm/2 + h_margin, top_row, 0]; left_rib_x = hole_dist_side + thickness; right_rib_x = width_mm - thickness*2.5 - tolerance*6; left_rib_x = thickness * 1; h_wall(h=4, l=right_rib_x); // bottom horizontal rib // h_wall(h=4, l=right_rib_x); // middle horizontal rib // bottom horizontal rib // h_wall(h=1.6, l=right_rib_x); // bottom horizontal rib h_wall(h=1.6, l=right_rib_x); // bottom right [right_edge, rotate_vector_sin * height], // top right [left_edge + height * rotate_vector_cos; [left_edge, rotate_vector_cos * rail_depth], // top horizontal rib // h_wall(h=4, l=right_rib_x); // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // one more vertical 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 cylindrical part of knob (in mm). If you want finger ridges around the setscrew (in mm). If dome cap is selected, it is machine-specific data v1.0 Final revision; added custom DRC as project file version 1) #Kicad 7 # 2-layer, 1oz copper condition "A.Type == 'pad' && (B.Type == 'text' || B.Type == A.Type && A.Net == B.Net" (condition "A.Pad_Type == 'NPTH, mechanical' && B.Type == A.Type && A.Net != B.Net" condition "A.Type == 'pad' && (B.Type == 'text' || B.Type == A.Type && A.Net == B.Net" condition "A.Type == 'track' && B.Type == A.Type")) # 4-layer condition "A.Type == 'pad' && A.Fabrication_Property == 'Castellated pad'" (condition "A.Net != B.Net" (condition "A.Type == 'track' && B.Type == 'graphic')")) # edge clearance condition "A.Type == 'track'")) # This would override board outline and milled areas # (condition "A.Type == 'via'" (condition "A.Type == 'pad' && B.Type == 'graphic')" # This would override board outline and milled areas # (condition "A.Type == 'track'")) # This would override board outline and milled areas # (condition "A.Type == 'track' && B.Type == 'track'" ; DRILL file {KiCad 5.1.10-88a1d61d58~90~ubuntu20.04.1} date Sat Aug 7 10:22:31 2021 e6b834b08c Fix floating pin for op amp in schmidt inverter mode, maybe both 7808 and hex inverter trigger are unnecessary? Alternative: Midi -> CV Alternative: CV from something else VCF MK's Diode Ladder VCF Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on (or derived from) the Program.

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