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Middle-bottom h rib // middle horizontal rib h_wall(h=4, l=right_rib_x); // middle-bottom h rib h_wall(h=1.6, l=right_rib_x); // bottom right [right_edge, rotate_vector_sin * rail_depth] // top horizontal rib // middle horizontal rib h_wall(h=4, l=right_rib_x); // middle-bottom h rib // middle horizontal rib // middle horizontal rib 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 SIP7, http://power.murata.com/data/power/ncl/kdc_nma.pdf Isolated 1W or 2W Single Output SM DC/DC Converters https://www.murata.com/products/productdata/8807031865374/kdc-nxe1.pdf#page=8 https://www.murata.com/products/productdata/8807031898142/kdc-nxe2.pdf#page=9 Isolated 1W or 2W Single Output SM DC/DC Converters 78sr3.3 78sr5 78sr9 78sr12 78srXX DCDC-Converter, RECOM, RECOM_R-78E-0.5, SIP-3, pitch 2.54mm, size 15.7x6.5mm^2, drill diamater 1.3mm, pad diameter 2.7mm, size source Multi-Contact FLEXI-E 0.1 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator connector wire 2.5sqmm strain-relief Soldered wire connection with feed through strain relief, for 2 times 0.75 mm² wire, basic insulation, conductor diameter 0.5mm, outer diameter 4.4mm, size source Multi-Contact FLEXI-E 0.75 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-111-02-xxx-DV-BE-LC, 11 Pins (http://www.molex.com/pdm_docs/sd/559320530_sd.pdf), generated with kicad-footprint-generator Molex 734 Male header (for PCBs); Angled solder pin 1 x 1 mm, 734-148 , 18 Pins (http://www.molex.com/pdm_docs/sd/908140004_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-104-02-xxx-DV-A, 4 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 JST XH series connector, B12B-PH-K (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py LFCSP, 8 Pin (https://www.ti.com/lit/ds/symlink/lp2987.pdf#page=26), generated with kicad-footprint-generator Inductor SMD CR75 Unshielded Inductor, Sunlord, SWPA252012S, 2.5x2.0x1.2mm, https://www.sunlordinc.com/UploadFiles/PDF_Cat/20120704094224784.pdf Inductor, Sunlord, MWSA0603S, 7.0x6.6x2.8mm, https://sunlordinc.com/Download.aspx?file=L1VwbG9hZEZpbGVzL1BERl9DYXQvMjAyMjExMTUxNDQ4MDU0NTQucGRm&lan=en Inductor, Sunlord, MWSA1204S-150, 13.45x12.8x4.0mm, https://sunlordinc.com/Download.aspx?file=L1VwbG9hZEZpbGVzL1BERl9DYXQvMjAyMjExMTUxNDQ4MDU0NTQucGRm&lan=en Inductor, Sunlord, MWSA1204S-220, 13.45x12.8x4.0mm, https://sunlordinc.com/Download.aspx?file=L1VwbG9hZEZpbGVzL1BERl9DYXQvMjAyMjExMTUxNDQ4MDU0NTQucGRm&lan=en Inductor, Sunlord, MWSA1206S-R68, 13.45x12.6x5.8mm, https://sunlordinc.com/Download.aspx?file=L1VwbG9hZEZpbGVzL1BERl9DYXQvMjAyMjExMTUxNDQ4MDU0NTQucGRm&lan=en Inductor, Sunlord, MWSA1204S-R22, 13.45x12.8x4.0mm, https://sunlordinc.com/Download.aspx?file=L1VwbG9hZEZpbGVzL1BERl9DYXQvMjAyMjExMTUxNDQ4MDU0NTQucGRm&lan=en Inductor, Sunlord.

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