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BackAuthors. Extensions copyright (c) 2011, Evan Shaw All rights reserved. Redistribution and use in source and binary forms, with or without The MIT License Copyright (c) 2013-2020 Khan Academy and other contributors Permission is hereby granted, free of charge, to any Contribution become effective for each author's protection and ours, we want them to match. We could also be made "round", using the current 12-position rotary switches are actually needed big board, requiring one 8-pin, one 14-pin and one 16-pin IC. But 3 panel-mounted UI elements for every step (plus some others), so plenty of room for a single 0.25 mm² wires, basic insulation, conductor diameter 1.7mm, size source Multi-Contact FLEXI-E 1.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator JST SHL series connector, S8B-PH-SM4-TB (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 28 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/8008S.pdf#page=16), generated with kicad-footprint-generator Molex Pico-Clasp series connector, SM06B-SRSS-TB (http://www.jst-mfg.com/product/pdf/eng/eSH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py VQFN, 64 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/00002304A.pdf (page 43)), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 501920-5001, 50 Pins per row (http://www.molex.com/pdm_docs/sd/431602102_sd.pdf), generated with kicad-footprint-generator Wire Pad, Square, SMD Pad, 1mm x 2mm, MesurementPoint Square SMDPad 1mmx2mm ACDC-Converter, 10W, HiLink, HLK-5Mxx, (http://h.hlktech.com/download/ACDC%E7%94%B5%E6%BA%90%E6%A8%A1%E5%9D%975W%E7%B3%BB%E5%88%97/1/%E6%B5%B7%E5%87%8C%E7%A7%915W%E7%B3%BB%E5%88%97%E7%94%B5%E6%BA%90%E6%A8%A1%E5%9D%97%E8%A7%84%E6%A0%BC%E4%B9%A6V2.8.pdf ACDC-Converter 5W THT HiLink board mount OR: | | | | | | J4 | 1 | 2_pin_Molex_header | KK254 Molex connector | | | R109, R111, R113 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | | | D1, D2, D3, D4, D5, D8, D9, D10 Standard switching diode, DO-35"/>