synth_tools

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X="4.9" y="6.7"/> <-- CV In main MK_VCO/Panels/fireball_vco_14hp_v1.scad 330 lines width = 38; // [1:1:84] fm_in = [input_column + h_margin/2, bottom_row, 0]; cv_in = [first_col, first_row, 0]; //Second row interface placement square_out = [width_mm-h_margin, row_1, 0]; fm_pot = [input_column + h_margin/2, row_1, 0]; triangle_out = [width_mm-h_margin-working_width/4, row_1, 0]; fm_pot = [input_column - h_margin/2, bottom_row, 0]; c_tune = [width_mm/2 + h_margin, top_row, 0]; f_tune = [width_mm/2 + h_margin, top_row, 0]; f_tune = [width_mm/2 + h_margin, top_row, 0]; f_tune = [second_col, first_row, 0]; sync_in = [first_col, fourth_row, 0]; pwm_cv_lvl = [width_mm - h_margin - working_width/8, row_4, 0]; left_rib_x = thickness * 1; right_rib_x = width_mm - thickness*2; // draw panel, subtract holes panel(width); // Top left: clock in, speed pot_p160(); // Left side: meta-step controls // run/stop (sw14 h_wall(h=4, l=slider_spacing*10-1, th=1); v_wall(h=4, l=height-rail_clearance*2-thickness, th=thickness*1.25); v_wall(h=4, l=height-rail_clearance*2, th=right_rib_thickness); // top left [left_edge, 0], // drop to axis [left_edge, -extra_depth], // bottom horizontal rib 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.

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