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Design is the decade counter expects CLOCK to pass 1/2 of V+ (i.e. 6v) but many external clock sources cycle between 0v and 5v max // gate out (j4/j10) // clock in (j2/j11) // casc out (j14/j15) // reset/casc in (j1/j13) // gate out // 1 to 4.9 milli Ohm (http://http://www.vishay.com/docs/30108/wsk.pdf Shunt Resistor SMD 1020 (2550 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: http://www.vishay.com/docs/20056/crcw01005e3.pdf), generated with kicad-footprint-generator JST XH series connector, 14110213001xxx (https://b2b.harting.com/files/download/PRD/PDF_TS/1411XX13001XXX_100228421DRW046C.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-145-02-xxx-DV, 45 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_noLead_generator.py QFN, 40 Pin (JEDEC MO-153 Var FA https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-130-02-xxx-DV-BE, 30 Pins per row (http://www.molex.com/pdm_docs/sd/431600105_sd.pdf), generated with kicad-footprint-generator JST PUD series connector, S14B-EH (http://www.jst-mfg.com/product/pdf/eng/eEH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py 1-way, 2.8mm lightpipe, 10mm lens output height, 17mm protrusion, https://www.bivar.com/parts_content/Datasheets/RLP1-XXX-XXX.pdf planar light pipe 4 way 3mm PhotoDiode, plastic SMD DIL, 4.5x4mm, area: 2.65x2.65mm, https://dammedia.osram.info/media/resource/hires/osram-dam-5467146/SFH%202440_EN.pdf DFN, 6 Pin (https://www.onsemi.com/pdf/datasheet/ncp349-d.pdf#page=12), generated with kicad-footprint-generator Connector Phoenix Contact connector footprint for: MSTBV_2,5/15-GF-5,08; number of pins: 14; pin pitch: 5.08mm; Vertical; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x4.5 C or ISO 7049-ST 2.2x4.5 C or ISO 7049-ST 2.2x4.5 C or ISO 7049-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1776524 12A || order number: 1844265 8A 160V Generic Phoenix Contact connector footprint for: MCV_1,5/12-GF-3.81; number of pins: 16; pin pitch: 5.08mm; Vertical; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x4.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1843907 8A 160V Generic Phoenix Contact SPT 5/1-V-7.5 1719309 Connector Phoenix Contact, SPT 2.5/8-V-5.0-EX 1732551 Connector Phoenix Contact connector footprint for: MSTBV_2,5/7-GF-5,08; number of pins: 12; pin pitch: 5.08mm; Vertical || order number: 1776906 12A || order number: 1766822 12A 630V Generic.

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