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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 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 M3, height 3.1, Wuerth electronics 9771110360 (https://katalog.we-online.com/em/datasheet/9771110360.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole 3.2mm, height 2.6, Wuerth electronics 9774030243 (https://katalog.we-online.de/em/datasheet/9774030243.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-149-02-xxx-DV-BE, 49 Pins per row (https://cdn.harwin.com/pdfs/M20-890.pdf), generated with kicad-footprint-generator Hirose DF13C SMD, CL535-0406-3-51, 6 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_plcc_jLead_generator.py PLCC, 32 pins, 18.4x8mm body (https://www.micron.com/~/media/documents/products/technical-note/nor-flash/tn1225_land_pad_design.pdf TSOP-I, 56 Pin (https://www.jedec.org/standards-documents/docs/mo-142-d variation AC), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-102-02-xxx-DV, 2 Pins (https://www.molex.com/pdm_docs/sd/026604020_sd.pdf), generated with kicad-footprint-generator JST ZE series connector, S5B-PH-SM4-TB (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py DHVQFN, 14 Pin (JEDEC MO-153 Var DB-1 https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Molex Micro-Fit 3.0 Connector System, 53047-1010, 10 Pins (http://www.molex.com/pdm_docs/sd/903250004_sd.pdf), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 501920-5001, 50 Pins per row (https://cdn.harwin.com/pdfs/M20-781.pdf), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, old mpn/engineering number: 1-770969-x, 3 Pins per row (http://www.molex.com/pdm_docs/sd/431602102_sd.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, LY20-40P-DLT1, 20 Circuits (https://www.molex.com/pdm_docs/sd/2005280200_sd.pdf), generated with kicad-footprint-generator JST PH series connector, BM04B-ACHSS-A-GAN-ETF (http://www.jst-mfg.com/product/pdf/eng/eACH.pdf), generated with kicad-footprint-generator Soldered wire connection, for 3 times outer diameter, generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-148-02-xxx-DV-LC, 48 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0834-6-81&productname=DF12E(3.0)-50DP-0.5V(81)&series=DF12&documenttype=2DDrawing⟨=en&documentid=0000992393), generated with kicad-footprint-generator JST XA series connector, S11B-EH (http://www.jst-mfg.com/product/pdf/eng/eEH.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole Mallory low-profile piezo buzzer, https://mspindy.com/spec-sheets/AST1109MLTRQ.pdf 5.5V, 470mF supercapacitor, 45mohm, -40ºC to +70ºC, https://www.cap-xx.com/wp-content/uploads/datasheets/CAP-XX-DMF470mF-Datasheet.pdf Cliff single 4mm shrouded banana panel socket, through-hole, horizontal, https://www.cliffuk.co.uk/products/testleads/sockets/S16NPC.pdf cliff 4mm socket jack banana C5080 SERIES 90° Wafer, (https://datasheet.lcsc.com/lcsc/1912261836_HR-Joint-Tech-Elec-C5080WR-04P_C477015.pdf connector side-entry ATA PATA IDE 5.25 inch floppy drive power USB 3.0, type A, right angle CCA Lumex RGB LED, http://www.inolux-corp.com/datasheet/SMDLED/Addressable%20LED/IN-PI554FCH.pdf LED RGB NeoPixel Mini 'Piranha' RGB LED, http://www.inolux-corp.com/datasheet/SMDLED/Addressable%20LED/IN-PI554FCH.pdf LED RGB NeoPixel addressable PLCC-4 5050 LED, SMD, PLCC-2, 3.0 x 2.0mm, orientation marker at anode, https://media.digikey.com/pdf/Data%20Sheets/CREE%20Power/CLM3A-BKW,GKW.pdf LED, SMD, 2mm diameter, http://www.farnell.com/datasheets/2711587.pdf LED PLCC-2 SMD package, http://www.infineon.com/cms/en/product/packages/PG-TO263/PG-TO263-5-1/ D2PAK DDPAK TO-263 D2PAK-7 TO-263-7 SOT-427 TO-263 / D2PAK / DDPAK SMD package, http://www.infineon.com/cms/en/product/packages/PG-TO252/PG-TO252-3-1/ TO-252/DPAK SMD package, http://www.infineon.com/cms/en/product/packages/PG-TO252/PG-TO252-5-11/ DPAK TO-252 DPAK-5 TO-252-5 TO-263 / D2PAK / DDPAK SMD package, http://www.infineon.com/cms/en/product/packages/PG-TO252/PG-TO252-3-1/ DPAK TO-252 DPAK-3 TO-252-3 SOT-428 TO-252-2, tab to pin 1.

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