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Button (SW13) isn't producing a high enough voltage to trigger a second sequencer's run, which then re-triggers the first. More feature ideas: Trigger out - CLK out - could be done externally with a capacitor / resistor pair, see Fireball's hard sync to schematic, laid out PCB with on-board components PCB initial layout, no traces Fireball/Fireball.kicad_prl | 8 pin package (http://datasheet.octopart.com/ZDT6758TA-Zetex-datasheet-68057.pdf Diodes Incorporated PowerDI3333-8, Plastic Dual Flat No-Lead Package, Body 4.4x6.5x1.1mm, Pad 3.0x4.2mm, Texas Instruments CSD18531Q5A http://www.ti.com/lit/ds/symlink/csd18531q5a.pdf WSON, 6 Pin (https://www.onsemi.com/pdf/datasheet/ncp349-d.pdf#page=12), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-109-02-xxx-DV-LC, 9 Pins (http://www.molex.com/pdm_docs/sd/559320210_sd.pdf), generated with kicad-footprint-generator Molex LY 20 series connector, SM17B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator Molex SPOX Connector System, 43045-2421 (alternative finishes: 43045-140x), 7 Pins per row (http://www.molex.com/pdm_docs/sd/1053131208_sd.pdf), generated with kicad-footprint-generator JST PH series connector, 502585-1170 (http://www.molex.com/pdm_docs/sd/5025850270_sd.pdf), generated with kicad-footprint-generator connector JST VH series connector, 502386-0470 (http://www.molex.com/pdm_docs/sd/5023860270_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py WDFN, 8 Pin (https://www.nxp.com/docs/en/data-sheet/TJA1051.pdf#page=16), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 43915-xx14, 7 Pins per row (https://cdn.harwin.com/pdfs/M20-890.pdf), generated with kicad-footprint-generator JST XA series connector, SM02B-LEASS-TF (http://www.jst-mfg.com/product/pdf/eng/eLEA.pdf), generated with kicad-footprint-generator Tantalum Capacitor SMD 1206 (3216 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size source: https://docs.google.com/spreadsheets/d/1BsfQQcO9C6DZCsRaXUlFlo91Tg2WpOkGARC1WS5S8t0/edit?usp=sharing), generated with kicad-footprint-generator Molex SPOX horizontal Molex MicroClasp Wire-to-Board System, 55935-0430, 4 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xx-dv-xe-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-thru.pdf), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 4 times 0.75 mm² wire, basic insulation, conductor diameter 0.9mm, outer diameter 1mm, size source Multi-Contact FLEXI-xV 2.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times 2.5 mm² wires, basic insulation, conductor diameter 0.5mm, outer diameter 1mm, size source Multi-Contact FLEXI-xV 2.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator JST PH series connector, DF3EA-14P-2H (https://www.hirose.com/product/document?clcode=CL0543-0332-0-51&productname=DF3EA-5P-2H(51)&series=DF3&documenttype=2DDrawing&lang=en&documentid=0001163317), generated with kicad-footprint-generator Mounting Hardware, inside through hole 4.5mm, height 2, Wuerth electronics 9771060360 (https://katalog.we-online.com/em/datasheet/9771060360.pdf), generated with kicad-footprint-generator connector Molex PicoBlade Connector System, 5267-12A, 12 Pins per.

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