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Mechanical assembly, and two other things: C13 is marked on the top knob top_row = height - v_margin - title_font_size*1.5; top_row = height - hole_dist_top); if (vertical) { module label(string, size=4, halign="center", height=thickness+1, font=default_label_font) { color([1,0,0]) linear_extrude(height) text(string, size, halign=halign, font=font); // draw a "vertical" wall 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 sot337-1_po.pdf SSOP16: plastic shrink small outline package; 16 leads; body width 4.4 mm (http://toshiba.semicon-storage.com/info/docget.jsp?did=30523&prodName=TBD62783APG SSOP20: plastic shrink small outline package; 28 leads; body width 4.4 mm; Exposed Pad (see Microchip Packaging Specification 00000049BS.pdf QFN, 64 Pin (https://www.silabs.com/documents/public/data-sheets/Si5345-44-42-D-DataSheet.pdf#page=51), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 64 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/ad7606_7606-6_7606-4.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-127-02-xxx-DV-LC, 27 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xx-dv-xe-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-thru.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 4.6, Wuerth electronics 97730456334 (https://katalog.we-online.com/em/datasheet/97730456334.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, 502382-1570 (http://www.molex.com/pdm_docs/sd/5023820270_sd.pdf), generated with kicad-footprint-generator JST GH series connector, S16B-ZESK-2D (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for a press-on type knob (rather than using a setscrew). (ShaftLength must be non-zero. NotchedShaft = 0; // (2) FIXED AND DERIVED MEASURES .

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