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Variables themselves v_wall(h=4, l=height-rail_clearance*2-thickness); // top horizontal rib // h_wall(h=1.6, 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 EPCOS app note at http://www.cypress.com/file/140006/download DFN, 6 Pin (https://www.jedec.org/sites/default/files/docs/Mo-178c.PDF variant AA), generated with kicad-footprint-generator Molex PicoBlade Connector System, 53047-0310, 3 Pins per row (http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=82181_SOFTSHELL_HIGH_DENSITY&DocType=CS&DocLang=EN), generated with kicad-footprint-generator Hirose DF13C SMD, CL535-0405-0-51, 5 Pins (http://www.molex.com/pdm_docs/sd/559320530_sd.pdf), generated with kicad-footprint-generator Molex LSHM 0.50 mm Razor Beam High-Speed Hermaphroditic Terminal/Socket Strip, LSHM-120-xx.x-x-DV-S, 20 Pins per row (http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=82181_SOFTSHELL_HIGH_DENSITY&DocType=CS&DocLang=EN), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-147-02-xxx-DV-BE-LC, 47 Pins per row (http://www.molex.com/pdm_docs/sd/428192214_sd.pdf), generated with kicad-footprint-generator JST SHL series connector, BM10B-GHS-TBT (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator JST VH series connector, B2B-PH-SM4-TB (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 10, Wuerth electronics 9774060360 (https://katalog.we-online.de/em/datasheet/9774060360.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-135-02-xxx-DV-BE-A, 35 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator TE, 2-826576-0, 20 Pins (http://www.molex.com/pdm_docs/sd/5024260810_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for a single 1 mm² wires, basic insulation, conductor diameter 0.65mm, outer diameter 1.5mm, hole diameter 1.2mm THT pad as test Point, square 3.0mm side length SMD rectangular pad as test point, loop diameter 3.8mm, hole diameter 1.3mm, wire diameter 0.5mm test point THT pad as test point, loop diameter 3.8mm, hole diameter 0.5mm test point wire loop as test point, pitch 7.62mm, hole diameter 1.3mm, hole diameter 1.0mm test point THT pad as test Point, square 1.0mm side length SMD rectangular pad as test Point, diameter 2.0mm 2 pins LED_Rectangular, Rectangular, Rectangular.

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