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Pretty confident we do these 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 https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf Single 2.4 GHz Wi-Fi and Bluetooth combo chip 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 20*15.4mm 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, https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf NINA-B111 LGA module 42 Pin (https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-qfn/05081875_0_UHE42.pdf), generated with kicad-footprint-generator Tantalum Capacitor SMD AVX-V (7361-38 Metric), IPC_7351 nominal, (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Molex 734 Male header (for PCBs); Straight solder pin 1 x 1 mm, 734-148 , 18 Pins (https://www.molex.com/pdm_docs/sd/026604020_sd.pdf), generated with kicad-footprint-generator Hirose series connector, B8B-PHDSS (http://www.jst-mfg.com/product/pdf/eng/ePHD.pdf), generated with kicad-footprint-generator Molex JAE 0.2mm pitch, 1mm overall height FFC/FPC connector, 50 top-side contacts, 1.0mm pitch, 1.0mm height, SMT, http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=84952&DocType=Customer+Drawing&DocLang=English&DocFormat=pdf&PartCntxt=84952-4 TE FPC connector, 50 top-side contacts, 0.5mm pitch, SMT, https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F1734839%7FC%7Fpdf%7FEnglish%7FENG_CD_1734839_C_C_1734839.pdf%7F4-1734839-0 TE FPC connector, 22 top-side contacts, 1.0mm pitch, 1.0mm height, SMT, http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=84952&DocType=Customer+Drawing&DocLang=English&DocFormat=pdf&PartCntxt=84952-4 TE FPC connector, 05 top-side contacts, 1.0mm pitch, 1.0mm height, SMT, http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=84953&DocType=Customer+Drawing&DocLang=English&DocFormat=pdf&PartCntxt=84953-4 TE FPC connector, 08 top-side contacts, 0.5mm pitch, 1.854mm thermal pad (CP-16-22, http://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/cp_16_22.pdf LFCSP, 16 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/436412f.pdf#page=22), generated with kicad-footprint-generator Molex KK-254 Interconnect System, old/engineering part number: 09-65-2068, 6 Pins (https://www.molex.com/pdm_docs/sd/009652028_sd.pdf), generated with kicad-footprint-generator.

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