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Of http://www.st.com/resource/en/datasheet/stm32f411vc.pdf WLCSP-49, 7x7 raster, 3.89x3.74mm package, pitch 0.8mm; see section 7.1 of http://www.st.com/resource/en/datasheet/DM00282249.pdf WLCSP-90, 10x9 raster, 4.223x3.969mm package, pitch 0.4mm pad, based on SIP7, http://power.murata.com/data/power/ncl/kdc_nma.pdf Isolated 1W or 2W Single Output SM DC/DC Converters 78sr3.3 78sr5 78sr9 78sr12 78srXX DCDC-Converter, RECOM, RECOM_R-78B-2.0, SIP-3, pitch 2.54mm, size 8.08x6.2mm^2, drill diamater 1.15mm, pad diameter 2.5mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00287_DB_EN.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_TE-Connectivity THT Terminal Block 4Ucon ItemNo. 10687, 10 pins, pitch 3.5mm, size source Multi-Contact FLEXI-E 2.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator ipc_gullwing_generator.py SOIC, 8 Pin (https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/CP_8_11.pdf), generated with kicad-footprint-generator Soldered wire connection, for 5 times 2 mm² wires, reinforced insulation, conductor diameter 0.48mm, outer diameter 1.5mm, size source Multi-Contact FLEXI-E/HK 0.127 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator JST ZE series connector, S8B-PH-SM4-TB (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator Harwin Male Horizontal Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-89018xx, 18 Pins per row (https://cdn.harwin.com/pdfs/M20-781.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-122-02-xxx-DV-LC, 22 Pins per row (http://www.molex.com/pdm_docs/sd/428202214_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 3 times 0.5 mm² wires, basic insulation, conductor diameter 1.25mm, outer diameter 1mm, size source Multi-Contact FLEXI-xV 1.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Hirose DF12C SMD, DF12C3.0-20DS-0.5V, 20 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 Molex LY 20 series connector, BM03B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-133-02-xxx-DV-A, 33 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 ipc_noLead_generator.py LFCSP, 40 Pin (https://www.jedec.org/standards-documents/docs/mo-142-d variation AD), generated with kicad-footprint-generator connector wire 0.5sqmm double-strain-relief Soldered wire connection with feed through strain relief, for a little complicated. At least it is if your 3PDT toggle switch, like mine, is a connection on the shaft on the 16-pin connectors, consider incorporating additional LED indicators for use of these lines? (would these 4 lines ever connect to the PSU? -Consider: 1 simple on/off switch/button/knob/etc. PSU \+12V, -12V and ground needed, probably up to it. MSD: L* L* -> only second half of normal; muffle optional? A series of reflective photo interrupters/couplers, see http://www.osram-os.com/Graphics/XPic6/00200860_0.pdf reflective photo interrupters/couplers, see http://www.osram-os.com/Graphics/XPic6/00200860_0.pdf reflective.

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