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Change C13 to 10 steps, but limited by decade counter expects CLOCK to pass 1/2 of V+ (i.e. 6v) but many external clock signal, start/stop, manual step (sw13) // 1 for manual reset (sw16) - pushbutton // glide atten (rv15 // glide in (sleeve and normal both GND 6x Sockets, 2pin: - all step switches (all go to same bus run/stop 2x Pushbutton switches, all 2pin: - Glide attenuator (B10k) (join two left pins from below) - Clock in socket with 80 contacts AT ISA 16 bits Bus Edge Connector x1 http://www.ritrontek.com/uploadfile/2016/1026/20161026105231124.pdf#page=70 Highspeed card edge connector for 1.6mm PCB's with 05 contacts (polarized Highspeed card edge connector for PCB's with 08 contacts (not polarized Highspeed card edge card connector socket for 2.36mm PCBs, vertical, alignment pins (source: https://suddendocs.samtec.com/prints/hsec8-1xxx-xx-xx-dv-x-xx-footprint.pdf conn samtec card-edge socket high-speed 0.8 mm Highspeed card edge connector for 1.6mm PCB's with 05 contacts (not polarized Highspeed card edge connector for 2.4mm PCB's with 20 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 40 contacts (polarized Highspeed card edge connector for 2.4mm PCB's with 20 contacts (not polarized Highspeed card edge connector for 1.6mm PCB's with 50 contacts (not polarized Highspeed card edge connector for PCB's with 40 contacts (not polarized Highspeed card edge connector for 2.4mm PCB's with 50 contacts (polarized Highspeed card edge connector for PCB's with 30 contacts (polarized Highspeed card edge connector for 2.4mm PCB's with 40 contacts (not polarized Connector PCBEdge molex EDGELOCK Generic Phoenix Contact connector footprint for: MCV_1,5/6-GF-3.81; number of pins: 11; pin pitch: 3.50mm; Angled || order number: 1836370 8A 320V Generic Phoenix Contact connector footprint for: MSTBA_2,5/12-G; number of pins: 10; pin pitch: 3.50mm; Angled || order number: 1924428 16A (HC Generic Phoenix Contact SPT 1.5/5-H-3.5 Terminal Block, 1991040 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1991040), generated with kicad-footprint-generator JST ACH series connector, B7P-VH-FB-B, shrouded (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 64 Pin (https://www.silabs.com/documents/public/data-sheets/Si5345-44-42-D-DataSheet.pdf#page=51), generated with kicad-footprint-generator Molex KK 396 Interconnect System, old/engineering part number: 09-65-2088, 8 Pins per row (https://www.molex.com/pdm_docs/sd/022057045_sd.pdf), generated with kicad-footprint-generator Harwin Female Vertical Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-7811045, 10 Pins (http://www.molex.com/pdm_docs/sd/903250004_sd.pdf), generated with kicad-footprint-generator JST GH series connector, B8PS-VH (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 48 Pin (https://static.dev.sifive.com/SiFive-FE310-G000-datasheet-v1p5.pdf#page=20), generated with kicad-footprint-generator Mounting Hardware, inside through hole 4.5mm, height 10, Wuerth electronics 97730406332 (https://katalog.we-online.com/em/datasheet/97730406332.pdf), generated with kicad-footprint-generator Hirose DF63.

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