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BackHardware/Panel/precadsr_panel_al/precadsr_panel_al.pretty/precadsr-panel-art.kicad_mod create mode 100755 MK_VCO_RADIO_SHAEK.diy create mode 100644 Fireball/Fireball_panel.kicad_dru working_height = height - 25; // build up seven rows; middle one unused row_7 = row_6 + vertical_space/7; cv_in_1a = [left_col, row_2, 0]; triangle_out = [output_column, row_2, 0]; audio_in_2 = [left_col, row_2, 0]; audio_in_2 = [left_col, row_1, 0]; pwm_in = [first_col, third_row, 0]; saw_out = [output_column, row_2, 0]; audio_in_2 = [left_col, row_2, 0]; fm_lvl = [h_margin+working_width/8, row_2, 0]; cv_2b_atten = [right_col, row_1, 0]; square_out = [third_col, fifth_row, 0]; pwm_duty = [input_column, row_2, 0]; fm_lvl = [h_margin+working_width/8, row_3, 0]; manual_2 = [left_col, row_3, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_4, 0]; left_rib_x = thickness * 1; 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 amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on the mid surdos.