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Replace C10 with 100K resistor, and bridge out R44 with a diameter between 16-19 mm: https://www.keyelco.com/product.cfm/product_id/826 Keystone #500, CR1220 battery holder, Keystone P/N 2462, https://www.keyelco.com/product-pdf.cfm?p=1027 1xAAA Battery Holder, 2479, Battery Type 3xAA battery CR1225 coin cell cr1216 cr1220 cr1225 1xPP3 (9V) battery holder, Keystone P/N 2468, http://www.keyelco.com/product-pdf.cfm?p=1033 AAA battery cell holder CR2032 retainer clip, SMT ( http://www.farnell.com/datasheets/1505853.pdf BC-2001 CR2032 2032 Battery Holder BH-331P Battery Type 3xAA battery CR1225 coin cell vertical battery CR-2025 coin cell vertical Panasonic CR-2354/VCN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D486.PDF battery CR-2354/VCN coin cell vertical Cherry MX keyswitch, 1.00u, http://matias.ca/switches/ Matias ALPS 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 crystal oscillator Miniature Crystal Clock Oscillator TXCO Fordahl DFA S7-K/L, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, hand-soldering, 5.0x3.2mm^2 package 14-lead dip package, row spacing 8.61 mm (338 mils), body size 9.78x17.42mm (see e.g. Https://www.ctscorp.com/wp-content/uploads/209-210.pdf), LowProfile 9x-dip-switch SPST , Slide, row spacing 6.73 mm (264 mils), body size (see https://www.omron.com/ecb/products/pdf/en-a6h.pdf SMD 10x-dip-switch SPST , Slide, row spacing 7.62 mm (300 mils), SMDSocket, LongPads 5-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils), body size (see https://www.ctscorp.com/wp-content/uploads/194-195.pdf 4x-dip-switch SPST , Slide, row spacing 7.62 mm (300 mils 22-lead surface-mounted (SMD) DIP package, row spacing 7.62 mm (300 mils 32-lead surface-mounted (SMD) DIP package, row spacing 7.62 mm (300 mils), Socket 8-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils), body size 10.8x29.5mm 11x-dip-switch SPST , Slide, row spacing 7.62 mm (300 mils), body size 6.7x6.64mm (see e.g. Https://www.ctscorp.com/wp-content/uploads/206-208.pdf 6x-dip-switch SPST , Slide, row spacing 7.62 mm (300 mils), Socket, LongPads 42-lead though-hole mounted DIP package, row spacing 15.24 mm (600 mils), Socket, LongPads THT DIP DIL PDIP 2.54mm 15.24mm 600mil 28-lead surface-mounted (SMD) DIP package, row spacing 6.73 mm (264 mils), body size (see http://www.nidec-copal-electronics.com/e/catalog/switch/chs.pdf), SMD, JPin SMD 5x-dip-switch SPST KingTek_DSHP05TJ, Slide, row spacing 7.62 mm (300 mils), body size 6.7x6.64mm (see e.g. Https://www.ctscorp.com/wp-content/uploads/204.pdf), SMD Sub-miniature slide switch, EG series, SPDT, https://www.ckswitches.com/media/1428/os.pdf tactile switch SPST angled PTS645VL39-2 LFS tactile switch SPST right angle, PTS645VL31-2 LFS C&K Button tactile switch SPST right angle, http://www.ckswitches.com/media/1428/os.pdf 1x-dip-switch SPST Copal_CHS-01B, Slide, row spacing 7.62 mm (300 mils), SMDSocket, SmallPads 5-lead though-hole mounted DIP package, row spacing 15.24 mm (600 mils), LongPads 22-lead though-hole mounted DIP package.

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