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BackVertical Panasonic CR-1632-V1AN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D464.PDF battery CR-1632 coin cell vertical Panasonic CR-3032/VCN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D508.PDF battery CR-3032 coin cell vertical battery CR-2025 coin cell retainer Keystone type 2993 negative battery contact Keystone type 2993 negative battery contact Keystone type 103 battery holder Keystone type 1057 coin cell vertical Cherry MX keyswitch 1.50u plate Cherry MX keyswitch, 1.25u, http://matias.ca/switches/ Matias ALPS keyswitch 1.75u PCB Cherry MX keyswitch 2.75u PCB Cherry MX keyswitch 6.25u Matias/ALPS keyswitch, 1.50u, plate mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch ISO enter 4-bit rotary coded switch, gull wing, Gray code, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf SMD SMT SPST EVQPUK EVQPUB SMD SMT ceramic resonator filter DSS6 SMD Resomator/Filter Murata SFSKA, http://cdn-reichelt.de/documents/datenblatt/B400/SFECV-107.pdf, hand-soldering, 4.5x2.0mm^2 package SMD Crystal SERIES SMD2520/2 http://www.icbase.com/File/PDF/HKC/HKC00061008.pdf, 5.0x3.2mm^2 package Abracon Miniature Ceramic Smd Crystal ABM3B http://www.abracon.com/Resonators/abm3b.pdf, 5.0x3.2mm^2 package Ultraminiature Crystal Clock Oscillator ECS 2520MV series SMD inductor Bourns SRR1210A SMD inductor https://datasheet.lcsc.com/lcsc/2009171439_TAI-TECH-TMPC1265HP-100MG-D_C305223.pdf, 13.5x12.5x6.2mm Tai Tech TMPC1265 series SMD inductor http://www.bourns.com/docs/Product-Datasheets/SRR1260.pdf SMD Inductor http://www.bourns.com/docs/Product-Datasheets/SRP1770TA.pdf Bourns SRP1770TA series SMD inductor http://www.bourns.com/docs/Product-Datasheets/SRP1038C.pdf Bourns SRP1038C SMD inductor Bourns SRU1028 series SMD inductor http://www.bourns.com/docs/Product-Datasheets/SRP1038C.pdf Bourns SRP1038C SMD inductor Bourns SRN4018 series SMD SMT SPST EVQPUM EVQPUD SMD 1x-dip-switch SPST Copal_CHS-01A, Slide, row spacing 9.53 mm (375 mils 18-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils), Socket 28-lead though-hole mounted DIP package, row spacing 5.08 mm (200 mils), body size (see https://www.ctscorp.com/wp-content/uploads/194-195.pdf 2x-dip-switch SPST KingTek_DSHP02TS, Slide, row spacing 7.62 mm (300 mils), http://multimedia.3m.com/mws/media/494546O/3mtm-dip-sockets-100-2-54-mm-ts0365.pdf 3M 18-pin zero insertion force socket, through-hole, row spacing 8.89 mm (350 mils), body size (see https://www.ctscorp.com/wp-content/uploads/194-195.pdf 10x-dip-switch SPST , Slide, row spacing 7.62 mm (300 mils), body size (see https://www.ctscorp.com/wp-content/uploads/194-195.pdf 2x-dip-switch SPST Copal_CVS-02xB, Slide, row spacing 7.62 mm (300 mils), http://multimedia.3m.com/mws/media/494546O/3mtm-dip-sockets-100-2-54-mm-ts0365.pdf 3M 42-pin zero insertion force socket, through-hole, row spacing 10.16 mm (400 mils), LongPads 16-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils 8-lead though-hole mounted DIP package, row spacing 5.9 mm (232 mils), body size 10.8x11.72mm 4x-dip-switch SPST , Slide, row spacing 7.62 mm (300 mils), Socket 42-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils), body size (see http://www.kingtek.net.cn/pic/201601201446313350.pdf), JPin SMD 2x-dip-switch SPST , Slide, row spacing 5.25 mm (206 mils), body size 6.7x16.8mm (see e.g. Https://www.ctscorp.com/wp-content/uploads/219.pdf), SMD, LowProfile SMD 5x-dip-switch SPST , Slide, row spacing 15.24 mm (600 mils 64-lead though-hole mounted DIP package, row spacing 8.61 mm (338 mils), body size 9.78x25.04mm (see e.g. Https://www.ctscorp.com/wp-content/uploads/206-208.pdf 3x-dip-switch SPST , Piano, row spacing 7.62 mm (300 mils), http://multimedia.3m.com/mws/media/494546O/3mtm-dip-sockets-100-2-54-mm-ts0365.pdf 3M 20-pin zero insertion force.