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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 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 3.2mm, height 5.6, Wuerth electronics 9774015633 (https://katalog.we-online.com/em/datasheet/9774015633.pdf), generated with kicad-footprint-generator Molex PicoBlade series connector, LY20-38P-DT1, 19 Circuits (http://www.jae.com/z-en/pdf_download_exec.cfm?param=SJ038187.pdf), generated with kicad-footprint-generator Hirose DF12C SMD, DF12C3.0-10DS-0.5V, 10 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator JST PH series connector, S10B-PH-SM4-TB (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator connector Molex CLIK-Mate series connector, B14B-ZESK-1D, with boss (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-107-02-xx-DV-PE-LC, 7 Pins per row (https://cdn.harwin.com/pdfs/M20-781.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 28 Pin (http://www.onsemi.com/pub/Collateral/601AE.PDF), generated with kicad-footprint-generator ipc_noLead_generator.py VQFN, 16 Pin (https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/cp_16_23.pdf, CP-16-23), generated with kicad-footprint-generator Soldered wire connection, for 5 times 0.75 mm² wires, basic insulation, conductor diameter 1.7mm, size source Multi-Contact FLEXI-E 2.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator JST J2100 horizontal JST XA series connector, S6B-XH-A (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator Molex SPOX Connector System, 53048-0810, 8 Pins per row (http://www.molex.com/pdm_docs/sd/428202214_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 16 Pin (http://cds.linear.com/docs/en/datasheet/37551fd.pdf#page=23), generated with kicad-footprint-generator ipc_noLead_generator.py TQFP, 48 Pin (http://www.ti.com/lit/ds/symlink/msp430f5232.pdf#page=111), generated with kicad-footprint-generator Tantalum Capacitor.

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