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Lines label_font_size = 5; //mm left_col = 10 + right_panel_width + thickness, th=1.5); main MK_SEQ/Schematics/Unseen Servant/Unseen Servant_slider_board_noncanonical.kicad_dru UI: 11 potentiometers - 13 SPDT switches 1 rotary switch - this needs a _big_ knob, these are for steps only row_1 = v_margin+12; row_2 = row_1 + vertical_space/7; row_5 = row_4 + vertical_space/7; row_3 = row_2 + vertical_space/7; row_6 = row_5 + vertical_space/7; row_5 = row_4 + vertical_space/7; cv_in_1a = [left_col, row_3, 0]; pwm_duty = [input_column, bottom_row, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_2, 0]; triangle_out = [output_column, row_2, 0]; fm_lvl = [h_margin+working_width/8, row_4, 0]; pwm_cv_lvl = [width_mm - h_margin - working_width/8, row_4, 0]; pwm_cv_lvl = [width_mm - h_margin - working_width/8, row_2, 0]; fm_lvl = [second_col, first_row, 0]; c_tune = [width_mm/2 + h_margin, top_row, 0]; f_tune = [second_col, fifth_row, 0]; //left_rib_x = thickness * 1; right_rib_x = width_mm - thickness*2; // draw panel, subtract holes panel(width); // lower h-rib reinforcer ## Photos ### Photos ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: make power connection traces larger; MK uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some supporting components. ~$6 in parts, mostly down to PCB edge 10.889999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector horizontal angled 90deg THT female pitch 2.77x2.84mm pin-PCB-offset 4.9399999999999995mm mounting-holes-distance 63.5mm mounting-hole-offset 63.5mm 37-pin D-Sub connector horizontal angled 90deg THT male pitch 2.77x2.84mm pin-PCB-offset 9.4mm 62-pin D-Sub connector straight vertical THT male pitch 2.41x2.54mm pin-PCB-offset 9.4mm 9-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.77x2.84mm, distance of mounting holes to PCB edge 4.9399999999999995mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector straight vertical THT male pitch 2.29x1.98mm pin-PCB-offset 9.4mm 26-pin D-Sub connector horizontal angled 90deg THT female pitch 2.29x1.98mm mounting holes to PCB edge 8.2mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 26-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.29x2.54mm, pin-PCB-offset 9.4mm, see http://docs-europe.electrocomponents.com/webdocs/1585/0900766b81585df2.pdf 26-pin D-Sub connector straight vertical THT male.

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