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Back@todo Provide an option to send to 16-pin cable when nothing is plugged into CLOCK. Could replace step IDs with a 7-segment display with a diameter between 16-19 mm: https://www.keyelco.com/product.cfm/product_id/826 Keystone #500, CR1220 battery holder, http://www.comf.com.tw/ProductDetail.asp?no=148 Keystone type 3008 coin cell Panasonic CR-2477/VCN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D502.PDF battery CR-2477 coin cell battery CR-1025 coin 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 Holder 18650 Battery Holder BH-331P Battery Type 3xAAA (Script generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 52 Pin (http://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/tqfp_edsv/sv_52_1.pdf), generated with kicad-footprint-generator connector wire 0.1sqmm double-strain-relief Soldered wire connection with feed through strain relief, for 5 mm | | Tayda | A-1121 | | U1 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | C2, C5, C6, C8 | 4 .../PCB/precadsr_Gerbers/precadsr-PTH.drl | 207 .../PCB/precadsr_Gerbers/precadsr-job.gbrjob | 128 .../precadsr_aux_Gerbers/precadsr-B_Mask.gbr | 185 .../precadsr_aux_Gerbers/precadsr-B_Paste.gbr | 15 .../precadsr_panel_al-F_Mask.gbr | 47 .../precadsr-panel.gbrjob | 126 .../precadsr-panel/precadsr-panel-cache.lib | 106 .../precadsr-panel-rescue.kicad_sym | 228 .../precadsr-panel/precadsr-panel.kicad_pro | 481 .../precadsr-panel/precadsr-panel.kicad_sch | 831 Hardware/Panel/precadsr-panel/sym-lib-table | 2 | 1nF | Film capacitor | | U2 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8"/>