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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 https://www.analog.com/media/en/technical-documentation/data-sheets/8063fa.pdf Altera BGA-36 V36 VBGA BGA-48 - pitch 0.8 mm Highspeed card edge connector for PCB's with 60 contacts (polarized Highspeed card edge connector for PCB's with 30 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 70 contacts (not polarized Highspeed card edge connector for 2.4mm PCB's with 08 contacts (not polarized Connector PCBEdge molex EDGELOCK Generic Phoenix Contact connector footprint for: MC_1,5/4-G-5.08; number of pins: 12; pin pitch: 3.81mm; Vertical || order number: 1757608 12A Generic Phoenix Contact connector footprint for: MSTBVA_2,5/3-G; number of pins: 02; pin pitch: 3.81mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1847699 8A 320V Generic Phoenix Contact SPT 5/3-H-7.5 Terminal Block, 1991079 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1991079), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 40 Pin (https://www.jedec.org/standards-documents/docs/mo-142-d variation DB), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-136-02-xx-DV-TE, 36 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 Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-118-02-xxx-DV, 18 Pins (https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=826576&DocType=Customer+Drawing&DocLang=English), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 3.6, Wuerth electronics 9774100482 (https://katalog.we-online.de/em/datasheet/9774100482.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, LY20-36P-DT1, 18 Circuits (http://www.jae.com/z-en/pdf_download_exec.cfm?param=SJ038187.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-128-02-xx-DV-PE-LC, 28 Pins per row (http://www.molex.com/pdm_docs/sd/428192214_sd.pdf), generated with kicad-footprint-generator Hirose DF11 through hole, DF13-10P-1.25DS, 10 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator JST VH series connector, B9B-XH-AM, with boss (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 5, Wuerth electronics 9774025360 (https://katalog.we-online.de/em/datasheet/9774025360.pdf), generated with kicad-footprint-generator Molex KK 396 Interconnect System, old/engineering part number: 5273-11A example for new part number: A-41792-0005 example for new part number: AE-6410-07A example for new part number: A-41791-0013 example for new mpn: 39-28-910x, 5 Pins per row (http://www.molex.com/pdm_docs/sd/431602102_sd.pdf), generated with kicad-footprint-generator Hirose DF12C SMD, DF12C3.0-32DS-0.5V, 32 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 Harwin Male Horizontal Surface Mount Common Mode Choke Coil SMD, Murata DLW5BTxxxSQ2x, https://www.murata.com/products/productdata/8796762701854/EFLC0020.pdf, manual footprint inductor common mode choke 1206 cnsw Inductor, Eaton, MCL2012V1, 2.0x1.2x0.9mm, https://eu.mouser.com/datasheet/2/87/eaton-mcl2012v1-multilayer-chip-inductor-data-shee-1622891.pdf Inductor ferrite multilayer power Ferrocore DLG-0302 unshielded SMD power package (https://www.microsemi.com/packaging-information/partpackage/details?pid=5341 Microsemi Powermite SMD power inductor, CWR1242C, H=7.7mm (http://www.sagami-elec.co.jp/file/16Car_SMDCwr.pdf SMD Power Inductor SMD, Coilcraft LPS5030, https://www.coilcraft.com/pdfs/lps5030.pdf, StepUp.

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