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  • Trio Eléctrico (11:52 - 15:50) Video lessons: https://www.youtube.com/watch?v=mmd_7p62Z18 (by de Miranda width = 38; // [1:1:84] fm_in = [input_column + h_margin/2, row_1, 0]; pwm_in = [input_column + h_margin/2, row_1, 0]; audio_out_2 = [right_col, row_3, 0]; pwm_duty = [second_col, third_row, 0]; //Fourth row interface placement saw_out = [third_col, fifth_row, 0]; pwm_duty = [second_col, fourth_row, 0]; //Fifth row interface placement fm_in = [h_margin+working_width/8, row_3, 0]; right_rib_x = width_mm - h_margin; cv_in = [h_margin, row_1, 0]; fm_pot = [input_column + h_margin/2, row_1, 0]; fm_in = [first_col, fourth_row, 0]; //Fifth row interface placement f_tune = [width_mm/2 - h_margin, top_row, 0]; left_rib_x = 0; right_rib_x = width_mm - 9.5/2 - right_rib_thickness - tolerance; // rib + half a jack col_right = width_mm - h_margin; input_column = h_margin; bottom_row = v_margin + 12; //knob_radius top_row = height - v_margin - title_font; left_rib_x = thickness * 1; h_wall(h=4, l=right_rib_x); // one more to mount the circuit board to, dead center // 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.

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