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1 red LED with left dot Overflow +- 1 red LED Single digit 7 segment orange, common anode, http://usasyck.com/products/AD-121F2_cat_e.pdf Afficheur 7 segments 10mm DIGIT 4 digit 7 segment green LED with left dot Overflow +- 1 red LED with left dot Overflow +- 1 red LED One digit 7 segment red LED with right dot One digit 7 segment LED display Double digit seven segment green LED, http://www.kingbrightusa.com/images/catalog/SPEC/CC56-12YWA.pdf Single digit 7 segment LED display 3 1/5 digit reflective arrow bat + 7 + 8); // pot + led + switch? Col_right = width_mm - h_margin; cv_in = [first_col, first_row, 0]; c_tune = [width_mm/2 + h_margin, top_row, 0]; left_rib_x = thickness * 1; right_rib_x = width_mm - hole_dist_side, height - v_margin - title_font; saw_out = [output_column, row_1, 0]; fm_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; h_margin = hole_dist_side + thickness; output_column = width_mm - h_margin; col_left = thickness * 1; right_rib_x = width_mm - 9.5/2 - right_rib_thickness - tolerance; // left_rib_x = thickness * 1; h_wall(h=4, 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 number of pins: 15; pin pitch: 3.50mm; Vertical || order number: 1757271 12A || order number: 1757323 12A || order number: 1803510 8A.

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