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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 SIP7, http://power.murata.com/data/power/ncl/kdc_nma.pdf Isolated 1W or 2W Single and Dual Output, 1500VDC Isolation, 19.0x17.0x8.7mm https://www.xppower.com/Portals/0/pdfs/SF_ISU02.pdf DCDC SMD TRACO TMR-1SM DCDC-Converter TRACO TEN20 Generic, https://assets.tracopower.com/20171102100522/TEN20/documents/ten20-datasheet.pdf DCDC-Converter TRACO TEN20 Generic Traco THD 15WIN, 15W, THT (https://www.tracopower.com/products/thd15win.pdf#page=3 traco dcdc tht 15w DCDC-Converter, TRACO, TMR 1-xxxx, Single output, Rev. March 21.2016 DCDC-Converter TRACO THN30 Generic muRata MEJ1DxxxxSC, 19.5x9.8x12.5mm, 5.2kVDC Isolated, 1W, dual output, http://www.cincon.com/upload/media/data%20sheets/Data%20Sheet%20(DC)/B%20CASE/SPEC-EC5BE-V24.pdf DCDC-Converter CINCON EC5BExx 18-36VDC to Dual output, http://www.cincon.com/upload/media/data%20sheets/Data%20Sheet%20(DC)/B%20CASE/SPEC-EC5BE-V24.pdf DCDC-Converter CINCON EC5BExx 18-36VDC to Dual output, Rev. March 21.2016 DCDC-Converter TRACO THN 10 to 30W, Single or dual Output, (https://www.tracopower.com/sites/default/files/products/datasheets/thn30_datasheet.pdf DCDC-Converter TRACO TMRxxxx Single/Dual_output DCDC-Converter, TRACO, TEN10-xxxx, single output, SIP package style, https://power.murata.com/data/power/ncl/kdc_mgj2.pdf Murata MGJ3, 5.2kVDC Isolated 3W Gate Drive, 15V/5V/5V Configurable, 22.61x23.11x14.19mm, https://power.murata.com/datasheet?/data/power/ncl/kdc_mgj3.pdf Murata NCS1SxxxxSC https://power.murata.com/data/power/ncl/kdc_ncs1.pdf (Script generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55935-0410, with PCB locator, 13 Pins (http://www.molex.com/pdm_docs/sd/559320530_sd.pdf), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 43915-xx14, 7 Pins per row (http://www.molex.com/pdm_docs/sd/431600105_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 6 times 0.25 mm² wire, basic insulation, conductor diameter 0.5mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-2V 0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Soldered wire connection, for 6 times 1 mm² wires, basic insulation, conductor diameter 0.5mm, outer diameter 1.7mm.

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