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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 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 2.25mm, height 1.5, Wuerth electronics 97730256330 (https://katalog.we-online.com/em/datasheet/97730256330R.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 56 Pin (JEDEC MO-153 Var JC-1 https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator JST PUD series connector, BM11B-GHS-TBT (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator Molex PicoBlade series connector, S05B-XASK-1 (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator Through hole angled pin header, 1x33, 1.27mm pitch, single row (from Kicad 4.0.7), script generated Through hole socket strip SMD 1x31 1.27mm single row Surface mounted socket strip SMD 1x29 2.54mm single row style1 pin1 left Surface mounted pin header THT 2x13 2.54mm double row Through hole vertical IDC box header 2x04 2.54mm double row Through hole straight pin header, 1x01, 2.54mm pitch, DIN 41651 / IEC 60603-13, double rows, 6.5mm latches, mounting holes, https://docs.google.com/spreadsheets/d/16SsEcesNF15N3Lb4niX7dcUr-NY5_MFPQhobNuNppn4/edit#gid=0 Through hole angled socket strip, 2x27, 1.27mm pitch, single row.

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