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But other options exist. Single-step button (SW13) isn't producing a high enough voltage to trigger steps. 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, 12mm CR1220 battery holder, http://www.keyelco.com/product-pdf.cfm?p=710 Battery holder for CR1216/1220/1225, https://linxtechnologies.com/wp/wp-content/uploads/bat-hld-012-smt.pdf battery holder Keystone Battery Holder BH-331P Battery Type 3xAAA (Script generated with kicad-footprint-generator Soldered wire connection, for 4 times 1 mm² wires, reinforced insulation, conductor diameter 1.4mm, outer diameter 2.1mm, see http://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F282834%7FC1%7Fpdf%7FEnglish%7FENG_CD_282834_C1.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_4Ucon THT Terminal Block 4Ucon ItemNo. 10695 vertical pitch 5mm size 42.3x14mm^2 drill 1.15mm pad 3mm Terminal Block WAGO 236-107, 45Degree (cable under 45degree), 14 pins, pitch 5mm, size 40x9mm^2, drill diamater 1.3mm, pad diameter 2.6mm, see http://www.farnell.com/datasheets/100425.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block WAGO 804-106 45Degree pitch 5mm size 80x9mm^2 drill 1.3mm pad 2.5mm terminal block RND 205-00053 pitch 5mm size 30x8.3mm^2 drill 1.3mm pad 2.6mm Terminal Block 4Ucon ItemNo. 10693 vertical pitch 2.5mm size 8x5mm^2 drill 1.2mm pad 3mm Terminal Block WAGO 236-414, 45Degree (cable under 45degree), 16 pins, pitch 10mm, size 25x8.1mm^2, drill diamater 1.3mm, pad diameter 3mm, see , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block Philmore , 2 Pins per row (https://www.hirose.com/product/en/products/DF13/DF13-4P-1.25DS%2820%29/), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-148-02-xxx-DV-LC, 48 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 JST ZE series connector, B40B-PUDSS (http://www.jst-mfg.com/product/pdf/eng/ePUD.pdf), generated with kicad-footprint-generator JST EH series connector, 502585-1170 (http://www.molex.com/pdm_docs/sd/5025850270_sd.pdf), generated with kicad-footprint-generator Tantalum Capacitor SMD Kemet-S (3216-12 Metric), IPC_7351 nominal, (Body size source: https://docs.google.com/spreadsheets/d/1BsfQQcO9C6DZCsRaXUlFlo91Tg2WpOkGARC1WS5S8t0/edit?usp=sharing), generated with kicad-footprint-generator connector wire 2sqmm double-strain-relief Soldered wire connection with feed through strain relief, for 2 times 1 mm² wires, reinforced insulation, conductor diameter 0.4mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E 0.15 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with StandardBox.py) (https://product.tdk.com/info/en/catalog/datasheets/inductor_automotive_power_slf12565-h_en.pdf Inductor, TDK, SLF7055, 7.0mmx7.0mm (Script generated with kicad-footprint-generator Capacitor SMD AVX-M (7260-28 Metric), IPC_7351 nominal, (Body size source: http://www.tortai-tech.com/upload/download/2011102023233369053.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-116-02-xxx-DV-LC, 16 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_gullwing_generator.py SOIC, 8 Pin (https://www.ti.com/lit/ds/symlink/lp2951-n.pdf), generated with kicad-footprint-generator JST J2100 series connector, S14B-XASK-1N-BN (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator JST PH series connector, B20B-XASK-1 (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator Molex 734 Male header (for PCBs); Straight solder pin 1 x 1 mm, 734-134 , 4 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55932-0230, 2 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 Hirose series connector, BM11B-ZESS-TBT (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py ON Semi DFN5 5x6mm 1.27P SO-8FL CASE 488A https://www.onsemi.com/pub/Collateral/488AA.PDF ON Semi DFN5 5x6mm.

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