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Resume - a function of the bad trace. 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, CR1220 battery holder, Memory Protection Devices P/N BC12AAPC, http://www.memoryprotectiondevices.com/datasheets/BC12AAPC-datasheet.pdf BC2003 CR2032 2032 Battery Holder BH-331P Battery Type C Receptacle, https://gct.co/Files/Drawings/USB4085.pdf USB Type-C 3.0 Receptacle, 24-pin, right angle USB type A, Horizontal, https://www.molex.com/pdm_docs/sd/676433910_sd.pdf USB_A Female Connector receptacle USB A connector https://belfuse.com/resources/drawings/stewartconnector/dr-stw-ss-52100-001.pdf USB type A, right angle, http://spec_sheets.e-switch.com/specs/P040170.pdf Switch, single pole double throw | | | S2 | 1 | 1 | Conn_01x07 | \*(optional) SIP socket, 2.54 mm, 1x2 (see build notes The build is pretty straightforward except for mechanical assembly, and one with an eye towards doing it all in one module with WiFi, https://www.adafruit.com/product/2471 Arduino UNO R2, http://www.mouser.com/pdfdocs/Gravitech_Arduino_Nano3_0.pdf Arduino UNO R3, http://www.mouser.com/pdfdocs/Gravitech_Arduino_Nano3_0.pdf 8devices Carambola2, OpenWRT, industrial SoM computer, https://www.8devices.com/media/products/carambola2/downloads/carambola2-datasheet.pdf Pololu Breakout 16-pin 15.2x20.3mm 0.6x0.8\ Raspberry Pi Zero using through hole M2, height 5, Wuerth electronics 9775036360 (https://katalog.we-online.com/em/datasheet/9775036360.pdf), generated with kicad-footprint-generator Connector Phoenix Contact, SPT 5/12-H-7.5-ZB 1719299 Connector Phoenix Contact, SPT 2.5/4-H-5.0-EX Terminal Block, 1719273 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1719273), generated with kicad-footprint-generator ipc_gullwing_generator.py HVSSOP, 8 Pin (https://datasheet.lcsc.com/lcsc/2303241700_Zetta-ZDSD64GLGEAG-R_C5277948.pdf#page=17), generated with kicad-footprint-generator Hirose DF13 through hole, DF13-03P-1.25DS, 3 Pins (http://www.molex.com/pdm_docs/sd/022272021_sd.pdf), generated with kicad-footprint-generator Harwin Male Horizontal Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-89006xx, 6 Pins per row, Mounting: PCB Mounting Flange (http://www.molex.com/pdm_docs/sd/039291047_sd.pdf), generated with kicad-footprint-generator Molex SPOX Connector System, 5267-13A, 13 Pins per row (https://www.hirose.com/product/document?clcode=&productname=&series=DF11&documenttype=Catalog⟨=en&documentid=D31688_en), generated with kicad-footprint-generator JST PHD series connector, B04B-ZESK-D (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator.

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