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Ring arrangement; a challenging PCB and/or print job! See PDF at https://raw.githubusercontent.com/kassu/kassutronics/master/documentation/Quantizer/Quantizer_Build_Docs_1.1A.pdf for explanation about PWM smoothing; essentially a 4-stage RC network but with an eye towards doing it all in one module with WiFi, https://www.adafruit.com/product/2471 Arduino UNO R2, http://www.mouser.com/pdfdocs/Gravitech_Arduino_Nano3_0.pdf Arduino UNO R2, http://www.mouser.com/pdfdocs/Gravitech_Arduino_Nano3_0.pdf Arduino UNO R2, http://www.mouser.com/pdfdocs/Gravitech_Arduino_Nano3_0.pdf Arduino UNO R3, http://www.mouser.com/pdfdocs/Gravitech_Arduino_Nano3_0.pdf 8devices Carambola2, OpenWRT, industrial SoM computer, https://www.8devices.com/media/products/carambola2/downloads/carambola2-datasheet.pdf Pololu Breakout 16-pin 15.2x20.3mm 0.6x0.8\ Raspberry Pi Zero using through hole 4.5mm, height 6, Wuerth electronics 9776090960 (https://katalog.we-online.com/em/datasheet/9776090960.pdf), generated with kicad-footprint-generator XP_POWER IA48xxD DIP DCDC-Converter XP_POWER IAxxxxS, SIP, (https://www.xppower.com/pdfs/SF_IA.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py UQFN, 10 Pin (https://www.ti.com/lit/ds/symlink/bq24090.pdf), generated with kicad-footprint-generator Resistor SMD 2512 (6332 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: http://www.tortai-tech.com/upload/download/2011102023233369053.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 43160-1103, 3 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 Mini-Universal MATE-N-LOK, old mpn/engineering number: 5566-08A2, example for new part number: 09-65-2098, 9 Pins per row (http://suddendocs.samtec.com/prints/lshm-1xx-xx.x-x-dv-a-x-x-tr-footprint.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py DSO DSO-8 SOIC SOIC-8 Infineon PG-DSO 12 pin, exposed pad, 7x7mm body (http://www.analog.com/media/en/technical-documentation/data-sheets/AD7951.pdf, http://www.analog.com/en/design-center/packaging-quality-symbols-footprints/symbols-and-footprints/AD7951.html LFCSP-WD, 8 Pin (https://www.ti.com/lit/ml/msop001a/msop001a.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 44 Pin (https://www.nxp.com/files-static/shared/doc/package_info/98ASS23225W.pdf?&fsrch=1), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 64 Pin (https://www.nxp.com/files-static/shared/doc/package_info/98ARH98426A.pdf), generated with kicad-footprint-generator JST PUD series connector, B3B-EH-A (http://www.jst-mfg.com/product/pdf/eng/eEH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py Texas QFN, 24 Pin (http://www.ti.com/lit/ds/symlink/bq25601.pdf#page=54), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 6 times 1.5 mm² wires, basic insulation, conductor diameter 0.9mm, outer diameter 1mm, size source Multi-Contact FLEXI-xV 1.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times 2.5 mm² wire, basic insulation, conductor diameter 1.4mm, outer diameter 3.9mm, size source Multi-Contact.

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