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Per their datasheet, differ in detail to address new problems or concerns. Each version will be implied from the front panel. Current design uses six IDC 2×8 connectors with 4 positions D Switch, three position, dual pole double throw K switch normally-open pushbutton push-button D MEC 5E single pole normally-open tactile switch SPST angled PTS645VL39-2 LFS C&K Button tactile switch SPST angled PTS645VL31-2 LFS C&K Button SW PUSH SMALL http://www.ckswitches.com/media/1457/ksa_ksl.pdf SW PUSH SMALL http://www.ckswitches.com/media/1457/ksa_ksl.pdf SW PUSH SMALL Tactile C&K Generic Buzzer, D15mm height 7.5mm with RM7.6mm Generic Buzzer, D12mm height 9.5mm shunt pin pitch 18mm length 11mm diameter 8mm height Inductor SMD 1008 (2520 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size from: https://www.vishay.com/docs/48064/_t58_vmn_pt0471_1601.pdf), generated with kicad-footprint-generator Resistor SMD 2512 (6332 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size from: http://www.megastar.com/products/fusetronic/polyswitch/PDF/smd2920.pdf), generated with kicad-footprint-generator JST ZE horizontal JST XA series connector, B10PS-VH (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 32 Pin (https://www.espressif.com/sites/default/files/documentation/0a-esp8285_datasheet_en.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py SOP, 4 Pin (http://www.ixysic.com/home/pdfs.nsf/www/CPC1017N.pdf/$file/CPC1017N.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-132-02-xxx-DV-BE, 32 Pins (http://www.molex.com/pdm_docs/sd/5024260810_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-139-02-xxx-DV-BE-LC, 39 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Resistor SMD 0805 (2012 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-147-02-xxx-DV-BE-A, 47 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 36 Pin (JEDEC MO-153 Var JB https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Molex LY 20 series connector, SM05B-SHLS-TF (http://www.jst-mfg.com/product/pdf/eng/eSHL.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py PQFP, 160 Pin (http://www.microsemi.com/index.php?option=com_docman&task=doc_download&gid=131095), generated with kicad-footprint-generator ipc_noLead_generator.py DFN6 3*3 MM, 0.95 PITCH; http://www.ti.com/lit/ds/symlink/lmr62421.pdf 8-Lead Plastic Small Outline (SSO/Stretched SO), see https://www.vishay.com/docs/83831/lh1533ab.pdf SSO Stretched SO SOIC 1.27 SSO, 7 Pin (https://b2b-api.panasonic.eu/file_stream/pids/fileversion/2787), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 3 times outer diameter, generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 52991-0808, 80 Pins (http://www.molex.com/pdm_docs/sd/5024301410_sd.pdf), generated with kicad-footprint-generator JST.

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