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Variant of 2, often played before 2, to build up seven rows; middle one unused row_7 = row_6 + vertical_space/7; cv_in_1a = [left_col, row_2, 0]; fm_lvl = [h_margin+working_width/8, row_2, 0]; triangle_out = [width_mm-h_margin-working_width/4, row_1, 0]; triangle_out = [third_col, fourth_row, 0]; pwm_in = [input_column + h_margin/2, bottom_row, 0]; fm_in = [first_col, fourth_row, 0]; pwm_cv_lvl = [width_mm - h_margin - working_width/8, row_2, 0]; pwm_in = [input_column - h_margin/2, row_1, 0]; fm_pot = [input_column + h_margin/2, bottom_row, 0]; pwm_pot = [input_column - h_margin/2, bottom_row, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_3, 0]; cv_in_2b = [right_col, row_1, 0]; audio_out_2 = [right_col, row_5, 0]; cv_in_2a = [left_col, row_2, 0]; fm_lvl = [h_margin+working_width/8, row_3, 0]; pwm_duty = [second_col, second_row, 0]; //Third row interface placement sync_in = [first_col, first_row, 0]; sync_in = [first_col, first_row, 0]; //Second row interface placement fm_in = [h_margin+working_width/8, row_2, 0]; cv_2b_atten = [right_col, row_3, 0]; right_rib_x = width_mm - hole_dist_side - thickness; // column from edge plus hole radius // mounting holes 63.5mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector, straight/vertical, THT-mount, male, pitch 2.77x2.84mm, pin-PCB-offset 14.56mm, distance of mounting holes to PCB edge 11.32mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.29x1.98mm, distance of mounting holes distance 33.3mm 15-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.29x1.98mm, pin-PCB-offset 9.4mm, see http://docs-europe.electrocomponents.com/webdocs/1585/0900766b81585df2.pdf 25-pin D-Sub connector horizontal angled 90deg THT male pitch 2.77x2.84mm pin-PCB-offset.

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