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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 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 2.7mm, height 9, Wuerth electronics 9771090360 (https://katalog.we-online.com/em/datasheet/9771090360.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 68 Pin (http://www.microsemi.com/index.php?option=com_docman&task=doc_download&gid=131095), generated with kicad-footprint-generator Molex LY 20 series connector, S30B-PUDSS-1 (http://www.jst-mfg.com/product/pdf/eng/ePUD.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py 16-Lead Plastic HTSSOP (4.4x5x1.2mm); Thermal pad with vias; (http://www.ti.com/lit/ds/symlink/drv8800.pdf HTSSOP, 16 Pin (https://www.ti.com/lit/ds/symlink/ts5v330.pdf#page=28 QFN, 20 Pin (https://pdfserv.maximintegrated.com/package_dwgs/21-0139.PDF (T2044-5C)), generated with kicad-footprint-generator Soldered wire connection, for 3 times outer diameter, generated with kicad-footprint-generator JST XA series connector, SM20B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSOP-I, 32 Pin (https://www.jedec.org/standards-documents/docs/mo-142-d variation BB), generated with kicad-footprint-generator JST XA series connector, BM03B-ZESS-TBT (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Hirose series connector, BM03B-GHS-TBT (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-141-02-xxx-DV-LC, 41 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 Soldered wire connection with double feed through strain relief, for 6 times 1.5 mm² wire, basic insulation, conductor diameter 0.48mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E_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 2 times 0.75 mm² wires, basic insulation, conductor diameter 1.4mm, outer diameter 2.3mm, size source Multi-Contact FLEXI-E_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 ipc_noLead_generator.py TQFN, 16 Pin (https://www.onsemi.com/pub/Collateral/NCN4555-D.PDF), generated with kicad-footprint-generator Soldered wire connection, for 4 times 1 mm² wires, reinforced insulation, conductor diameter 0.5mm, outer diameter 2.7mm, size source Multi-Contact FLEXI-E 1.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times 1 mm² wires.

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