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Back2x28, 1.27mm pitch, single row style1 pin1 left Surface mounted pin header THT 1x20 2.00mm single row style2 pin1 right Through hole straight pin header, 2x40, 1.00mm pitch, single row male, vertical entry Harwin LTek Connector, 4 pins, pitch 3.5mm, size source Multi-Contact FLEXI-E_0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator ipc_dfn_qfn_generator.py LFCSP, 20 Pin (JEDEC MO-153 Var HA https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 56 Pin (https://www.jedec.org/standards-documents/docs/mo-142-d variation AC), generated with kicad-footprint-generator Molex Molex 1.00mm Pitch Easy-On BackFlip Type FFC/FPC, 502250-3591, 35 Circuits (http://www.molex.com/pdm_docs/sd/5022503591_sd.pdf), generated with kicad-footprint-generator JST PH series connector, 14110613002xxx (https://b2b.harting.com/files/download/PRD/PDF_TS/1411XX13002XXX_100228421DRW035C.pdf), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 502426-3010, 30 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 Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-145-02-xxx-DV, 45 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0834-6-81&productname=DF12E(3.0)-50DP-0.5V(81)&series=DF12&documenttype=2DDrawing⟨=en&documentid=0000992393), generated with kicad-footprint-generator 4UCON 10156 Card edge socket with amplifier to handle weaker (<6v) signals Sequencer cascading to trigger a second sequencer's run, which then re-triggers the first. - Trigger out - could be other values, ceramic may work, test debouncing. Maybe enlarge footprint if needed. - Resistor footprint could stand to be severed. [See this image of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by some reasonable means, this is actually a pushbutton momentary, but roughly same dimensions as toggle switch ON-ON Push button switch, push-to-open, generic, two pins