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Also interesting UI, featuring lit pushbuttons in a 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 integral chip antenna (http://ww1.microchip.com/downloads/en/DeviceDoc/60001380C.pdf Cypress EZ-BLE PRoC Module (Bluetooth Smart) 21 Pin Module Digi XBee SMT RF ESP WROOM-02 espressif esp8266ex 2.4 GHz Wi-Fi and Bluetooth combo chip with U.FL connector, https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf D52M ANT SoC Module https://www.thisisant.com/assets/resources/D00001687_D52_Module_Datasheet.v.2.3_(Garmin).pdf RF SoC Radio ANT Bluetooth BLE D52 nRF52 Garmin Canada Dynastream Nordic Low Power Long Range LoRa Transceiver Module SMD-16 (https://www.hoperf.com/data/upload/portal/20181127/5bfcbea20e9ef.pdf LoRa Low Power Long Range Transceiver Module THT-16 (https://www.hoperf.com/data/upload/portal/20181127/5bfcbea20e9ef.pdf Low Power Long Range LoRa Transceiver Module Low Power Long Range Transceiver Module rf module lora lorawan Multiprotocol radio SoC module https://www.raytac.com/download/index.php?index_id=43 wireless 2.4 GHz Wi-Fi and Bluetooth module ESP32-D0WD Espressif ESP32-WROOM-32E 2.4 GHz Wi-Fi and Bluetooth combo chip https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf Single 2.4 GHz Wi-Fi and Bluetooth combo chip, external antenna, https://www.espressif.com/sites/default/files/documentation/esp32-s3-mini-1_mini-1u_datasheet_en.pdf 2.4 GHz Wi-Fi Bluetooth external antenna espressif 15.4*15.4mm ESP32-S2-WROVER(-I) 2.4 GHz Wi-Fi and Bluetooth module ESP32-D0WD Espressif ESP32-WROOM-32E 2.4 GHz Wi-Fi and Bluetooth module Single 2.4 GHz Wi-Fi Bluetooth external antenna espressif 15.4*15.4mm ESP32-S2-WROVER(-I) 2.4 GHz Bluetooth ble zigbee 802.15.4 thread nordic raytac nrf52840 nrf52833 Bluetooth Low Energy Module ble module st bluetooth Taiyo Yuden BK Series (see https://www.yuden.co.jp/productdata/catalog/mlci09_e.pdf Inductor, Walsin, WLFM252009x, 2.5x2.0x0.9mm, http://www.passivecomponent.com/wp-content/uploads/inductor/WLFM_C_series.pdf Inductor, Wuerth, WE-XHMI 8080, 8.3mmx8.8mm (Script generated with kicad-footprint-generator Hirose DF13 through hole, DF11-4DP-2DSA, 2 Pins per row (http://www.molex.com/pdm_docs/sd/428202214_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 4 times 0.1 mm² wires, reinforced insulation, conductor diameter 0.4mm, outer diameter 1.5mm, hole diameter 1.0mm THT pad as test Point, diameter 2.0mm SMT Gate Drive Transformer, 1:1, 9.0x8.6x7.6mm (https://productfinder.pulseeng.com/products/datasheets/P663.pdf SMT Gate Drive Transformer, 1.25:1, 10.9x9.7x2.7mm (https://productfinder.pulseeng.com/products/datasheets/SPM2007_61.pdf Current sense transformer, SMD, 8.0x8.13x5.3mm (https://www.coilcraft.com/pdfs/cst.pdf Transformer current sense SMD Current sense transformer, SMD, 14.55x19.91x10.50mm (https://www.coilcraft.com/pdfs/cst2010.pdf Transformer current sense SMD Current sense transformer, SMD, 8.0x8.13x5.3mm (https://www.coilcraft.com/pdfs/cst.pdf Transformer current sense SMD 8.4x7.2mm Ethernet Transformer, Bel S558-5999-T7-F, https://www.belfuse.com/resources/ICMs/lan-/S558-5999-T7-F.pdf Transformer Ethernet SMD, https://www.haloelectronics.com/pdf/discrete-genesus.pdf Halo N2 SO, 16 Pin (http://www.st.com/resource/en/datasheet/lis331hh.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 64 Pin (https://www.infineon.com/dgdl/Infineon-MA12040-DS-v01_00-EN.pdf?fileId=5546d46264a8de7e0164b7467a3d617c#page=81), generated with kicad-footprint-generator Harting har-flexicon vertical Harting har-flexicon series connector, B02B-XASK-1-A (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py Texas X2QFN, 12 Pin (https://www.renesas.com/us/en/document/psc/package-drawing-tdfn-12pin-l123x3c), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 28 Pin (JEDEC MO-194 Var AA https://www.jedec.org/document_search?search_api_views_fulltext=MO-194), generated with kicad-footprint-generator Mounting Hardware, inside through hole 3.3mm, height 3, Wuerth electronics 9774090482 (https://katalog.we-online.de/em/datasheet/9774090482.pdf), generated with.

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