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Streets of the top edge or circumference using spheres (or rather regular polyhedra) arranged 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 lots of analog drum voices; based heavily on Moritz Klein's work, 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 PLCC, 68 pins, through hole M3, height 5.1, Wuerth electronics 9775086360 (https://katalog.we-online.com/em/datasheet/9775086360.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-105-02-xxx-DV-BE-LC, 5 Pins per row (https://www.molex.com/pdm_docs/sd/022057045_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py VQFN, 24 Pin (http://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-qfn/QFN_20_05-08-1742.pdf), generated with kicad-footprint-generator Molex PicoBlade Connector System, 43045-2421 (alternative finishes: 43045-022x), 1 Pins per row (https://www.hirose.com/product/en/products/DF13/DF13-2P-1.25DSA%2850%29/), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-142-02-xx-DV-TE, 42 Pins per row (https://www.molex.com/pdm_docs/sd/022057045_sd.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 43160-0104, 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 Soldered wire connection with double feed through strain relief, for 4 times 0.25 mm² wires, reinforced insulation, conductor diameter 2.4mm, see , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block RND 205-00067, 2 pins, http://www.kingbright.com/attachments/file/psearch/000/00/00/L-47XEC(Ver.9A).pdf LED Round FlatTop Rectangular size 5.0x2.0mm^2 z-position of LED center 1.0mm 2 pins LED, Round, FlatTop, Rectangular size 5.0x2.0mm^2 z-position of LED center 1.6mm 2 pins Rectangular size 5.0x2.0mm^2 z-position of LED center 1.0mm, 2 pins, diameter 1.8mm size 1.8x2.4mm^2 z-position of LED center 2.0mm, 2 pins, http://www.kingbright.com/attachments/file/psearch/000/00/00/L-5603QBC-D(Ver.12B).pdf LED_Oval Oval Oval size 5.2x3.8mm^2 2 pins LED, diameter 5.0mm z-position of LED center 3.0mm, 2 pins, diameter 5.0mm z-position of LED center 2.0mm 2 pins LED_Oval, Oval, Oval size 5.2x3.8mm^2, 2.

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