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Be nice. Lots of options for potentiometer inputs; knobs for potentiometer spoke placement' (#1) from pcb_finalization into main Reviewed-on: https://gitea.circuitlocution.com/synth_mages/MK_VCO/pulls/5 From d8eca8dc7ee0c083143ca1478ae7c1277063e5c9 Mon Sep 17 00:00:00 2001 Subject: [PATCH] More layout updates Add circuit blocks to kick drum schematic Add pulldown resistors for reset debounce cap; formatting col_left = thickness * 2; right_rib_x = width_mm - thickness*2; // How much horizontal space needed for left-hand and right-hand sub-panels left_panel_width = 40; // [1:1:84] working_increment = working_height / (8+tolerance/3); // generally-useful spacing amount for vertical columns of stuff col_left = h_margin; col_right = width_mm - thickness*2; // How much horizontal space needed for left-hand and right-hand sub-panels left_panel_width = 12*3 + tolerance*2; // rib + half a jack col_right = width_mm - hole_dist_side, height - v_margin - title_font_size*2; saw_out = [output_column, bottom_row, 0]; pwm_duty = [second_col, fourth_row, 0]; //Fifth row interface placement fm_in = [input_column - h_margin/2, bottom_row, 0]; pwm_pot = [input_column - h_margin/2, row_1, 0]; triangle_out = [third_col, fifth_row, 0]; //left_rib_x = thickness * 1; 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 on https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin variant by Heraeus, drill 0.75mm (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot487-1_po.pdf HTSSOP, 38 Pin (JEDEC MO-153 Var JC-1 https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Wuerth WR-WTB series connector, S2B-EH (http://www.jst-mfg.com/product/pdf/eng/eEH.pdf), generated with kicad-footprint-generator JST J2100 series connector, 501331-1107 (http://www.molex.com/pdm_docs/sd/5013310207_sd.pdf), generated with kicad-footprint-generator JST XA series connector, B10P-VH-B (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator Molex LY 20 series connector, DF3EA-02P-2H (https://www.hirose.com/product/document?clcode=CL0543-0332-0-51&productname=DF3EA-5P-2H(51)&series=DF3&documenttype=2DDrawing⟨=en&documentid=0001163317), generated with kicad-footprint-generator Molex Molex 1.00mm Pitch Easy-On BackFlip, Right-Angle, Bottom Contact FFC/FPC, 200528-0240, 24 Circuits (https://www.molex.com/pdm_docs/sd/2005280240_sd.pdf), generated with kicad-footprint-generator Hirose DF12C SMD, DF12C3.0-30DS-0.5V, 30 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0834-6-81&productname=DF12E(3.0)-50DP-0.5V(81)&series=DF12&documenttype=2DDrawing&lang=en&documentid=0000992393), generated with kicad-footprint-generator JST VH series connector, 14110713002xxx (https://b2b.harting.com/files/download/PRD/PDF_TS/1411XX13002XXX_100228421DRW035C.pdf), generated with kicad-footprint-generator.

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