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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 4.5mm, height 6, Wuerth electronics 9774010243 (https://katalog.we-online.de/em/datasheet/9774010243.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-139-02-xxx-DV-A, 39 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 JST XH series connector, SM12B-GHS-TB (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator JST XH series connector, S04B-XASK-1 (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 16 Pin (JEDEC MO-153 Var FA https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Harting har-flexicon series connector, B12B-XH-AM, with boss (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator JST SHL series connector, B09B-XASK-1-A (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55935-0510, with PCB locator, 11 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 JST PUD series connector, S10B-XH-A-1 (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator Molex KK 396 Interconnect System, old/engineering part number: A-41791-0014 example for new mpn: 39-28-x08x, 4 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 ipc_gullwing_generator.py LQFP, 32 Pin (https://www.nxp.com/docs/en/data-sheet/LPC111X.pdf#page=108), generated with kicad-footprint-generator ipc_gullwing_generator.py Texas Instruments HSOP 9, 1.27mm pitch, double cols (from Kicad 4.0.7), script generated Through hole straight pin header, 2x37, 1.00mm pitch, double rows Through hole angled pin header THT 1x29 2.00mm single row Through hole angled socket strip THT 2x16 2.54mm double row Through hole angled socket strip, 1x28, 2.00mm pitch, 4.2mm pin length, single row Through hole angled pin header SMD 1x19 2.00mm single row style1 pin1 left Surface mounted socket strip.

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