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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 2.25mm, height 4, Wuerth electronics 97730306330 (https://katalog.we-online.com/em/datasheet/97730306330.pdf), generated with kicad-footprint-generator JST XH series connector, 505405-0470 (http://www.molex.com/pdm_docs/sd/5054050270_sd.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py HTSOP, 8 Pin (https://www.onsemi.com/pub/Collateral/NUF4401MN-D.PDF#page=6), generated with kicad-footprint-generator ipc_gullwing_generator.py NF-Transformer, ETAL, P3191, SMD, NF-Transformer ETAL P3191 SMD NF-Transformer, ETAL, P2781, SMD, Handsoldering NF-Transformer ETAL P3188 SMD NF-Transformer, ETAL, P2781, SMD, Handsoldering NF-Transformer ETAL P3191 SMD Handsoldering NF-Transformer, ETAL, P3181, SMD, Hand Soldering, NF-Transformer ETAL P3188 SMD Handsoldering NF-Transformer, ETAL, P3191, SMD, Handsoldering, NF-Transformer ETAL P3181 SMD NF-Transformer, ETAL, P3181, SMD, Hand Soldering, NF-Transformer ETAL P3191 SMD NF-Transformer, ETAL, P2781, SMD, NF-Transformer ETAL P2781 SMD Handsoldering For H1100NL, H1101NL, H1102NL, H1121NL, H1183NL, H1199NL, HX1188NL, HX1198NL and H1302NL. Https://productfinder.pulseeng.com/doc_type/WEB301/doc_num/H1102NL/doc_part/H1102NL.pdf H1100NL H1101NL H1102NL H1121NL H1183NL H1199NL HX1188NL HX1198NL H1302N Power Transformer, horizontal core with bobbin, 6 pin, https://www.winsen-sensor.com/d/files/semiconductor/mq-6.pdf Sensair S8 Series CO2 sensor, 1kHz PWM output, Modbus, THT co2 gas sensor pwm modbus Sensirion SCD4x QFN, 20 Pin (JEDEC MO-153 Var JD https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Molex KK 396 Interconnect System, old/engineering part number: 26-60-4100, 10 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 connector JST ZE series connector, SM22B-SHLS-TF (http://www.jst-mfg.com/product/pdf/eng/eSHL.pdf), generated with kicad-footprint-generator JST XH series connector, S4P-VH (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 55560-0801, 80 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 Pico-EZmate_Slim side entry JST JWPF series connector, 14110513002xxx (https://b2b.harting.com/files/download/PRD/PDF_TS/1411XX13002XXX_100228421DRW035C.pdf), generated with kicad-footprint-generator Resistor SMD 01005 (0402 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size from: http://www.kemet.com/Lists/ProductCatalog/Attachments/253/KEM_TC101_STD.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-124-02-xxx-DV-LC, 24 Pins per row (http://www.molex.com/pdm_docs/sd/460071105_sd.pdf), generated with kicad-footprint-generator JST XH series connector, 502386-1170 (http://www.molex.com/pdm_docs/sd/5023860270_sd.pdf), generated with kicad-footprint-generator.

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