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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 DCDC-Converter, http://power.murata.com/data/power/ncl/kdc_nma.pdf Murata NMAxxxxSC footprint based on EPCOS app note 93 (https://www.catagle.com/45-2/PDF_AN93.htm Bourns TBU-CA Fuse, 2 Pin (https://www.bourns.com/data/global/pdfs/TBU-CA.pdf), generated with kicad-footprint-generator Molex KK-254 Interconnect System, old/engineering part number: 09-65-2088, 8 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 EH series connector, B14B-ZESK-1D, with boss (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator connector Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-146-02-xx-DV-PE-LC, 46 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 JST GH series connector, 14110813002xxx (https://b2b.harting.com/files/download/PRD/PDF_TS/1411XX13002XXX_100228421DRW035C.pdf), generated with kicad-footprint-generator Molex Pico-Clasp series connector, DF3EA-08P-2H (https://www.hirose.com/product/document?clcode=CL0543-0332-0-51&productname=DF3EA-5P-2H(51)&series=DF3&documenttype=2DDrawing&lang=en&documentid=0001163317), generated with kicad-footprint-generator JST SH series connector, 502443-0670 (http://www.molex.com/pdm_docs/sd/5024430270_sd.pdf), generated with kicad-footprint-generator JST VH vertical JST J2100 series connector, SM14B-SHLS-TF (http://www.jst-mfg.com/product/pdf/eng/eSHL.pdf), generated with kicad-footprint-generator Capacitor SMD Kemet-Y (7343-40 Metric), IPC_7351 nominal, (Body size source: http://www.tortai-tech.com/upload/download/2011102023233369053.pdf), generated with kicad-footprint-generator connector JST ACH series connector, 502494-1470 (http://www.molex.com/pdm_docs/sd/5024940270_sd.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, BM08B-ZESS-TBT (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-142-02-xxx-DV-A, 42 Pins per row (https://www.hirose.com/product/document?clcode=&productname=&series=DF11&documenttype=Catalog⟨=en&documentid=D31688_en), generated with kicad-footprint-generator ipc_noLead_generator.py 8-Lead Very Thin Dual Flatpack No-Lead Package, 9x9mm Body (see Atmel Appnote 8826 10-Lead Plastic Micro Small Outline Package (MS) [MSOP] (see Microchip Packaging Specification 00000049BS.pdf TQFP, 48 Pin (JEDEC MO-153 Var ED https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator JST.

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