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TLC7524/AD7524 (a simple DAC that's still sorta analog) and a momentary-on button to advance the step LED + 23mm hole_left = slider_center - 13; hole_bottom = hole_top - 89.75; // these are actually needed big board, requiring one 8-pin, one 14-pin and one 16-pin IC. But 3 panel-mounted UI elements for every step (plus some others), so plenty of room for a single 1 mm² wire, basic insulation, conductor diameter 0.5mm, outer diameter 3.6mm, 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 ipc_gullwing_generator.py Texas Instruments LM25119 http://www.ti.com/lit/ds/symlink/lm25119.pdf WQFN, 42 Pin (https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-qfn/05081875_0_UHE42.pdf), generated with kicad-footprint-generator Molex Nano-Fit side entry Molex MicroClasp Wire-to-Board System, 55932-0530, 5 Pins per row (http://www.molex.com/pdm_docs/sd/530480210_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 56 Pin (JEDEC MO-153 Var HD https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, old mpn/engineering number: 5566-04A, example for new mpn: 39-29-4209, 10 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 Inductor SMD 0201 (0603 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size from: http://datasheets.avx.com/AVX-HV_MLCC.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-123-02-xxx-DV, 23 Pins per row (http://www.molex.com/pdm_docs/sd/431605304_sd.pdf), generated with kicad-footprint-generator JST PH series connector, B18B-PHDSS (http://www.jst-mfg.com/product/pdf/eng/ePHD.pdf), generated with kicad-footprint-generator Molex Micro-Fit 3.0 Connector System, 5267-13A, 13 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 Molex Molex 0.30mm Pitch Easy-On BackFlip, Right-Angle, Bottom Contact FFC/FPC, 200528-0040, 4 Circuits (http://www.jae.com/z-en/pdf_download_exec.cfm?param=SJ038187.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py 8-Pin ePad 3mm x 3mm MLF - 3x3x0.85 mm Body [TQFP] With 4.5x4.5 mm Exposed Pad [eTSSOP] (see Microchip Packaging Specification 00000049BS.pdf VQFN, 16 Pin (https://toshiba.semicon-storage.com/info/docget.jsp?did=12858&prodName=TLP291-4), generated with kicad-footprint-generator ipc_noLead_generator.py LGA, 14 Pin (https://www.st.com/resource/en/datasheet/l6491.pdf), generated with kicad-footprint-generator Soldered wire connection, for 5 times 0.75 mm² wires, reinforced insulation, conductor diameter 0.9mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E 1.0 (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 XH series connector, S18B-PUDSS-1 (http://www.jst-mfg.com/product/pdf/eng/ePUD.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-106-02-xx-DV-TE, 6 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 Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-140-02-xxx-DV-BE-LC, 40 Pins (http://www.molex.com/pdm_docs/sd/5019204001_sd.pdf), generated with StandardBox.py) (https://www.we-online.com/components/products/datasheet/74439358068.pdf Inductor Wuerth WE-XHMI 8080 WE-CAIR Air coil, https://www.we-online.com/components/products/datasheet/744918254.pdf air coil inductor wurth we cair Semi-Shielded High Saturation Power Inductor, Ms50T, SMD, Fixed inductor, SMD, https://neosid.de/import-data/product-pdf/neoFestind_SMPIC0612H.pdf Neosid Power Inductor SMD, Coilcraft LPS5030, https://www.coilcraft.com/pdfs/lps5030.pdf, StepUp generated footprint, http://katalog.we-online.de/pbs/datasheet/7440310047.pdf wurth wuerth smd inductor Current-Compensated Ring Core Double Chokes, EPCOS, B82722A, 22.3mmx22.7mm, https://en.tdk.eu/inf/30/db/ind_2008/b82722a_j.pdf.

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