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Keystone, https://ken.keyeuro.eu/cat/590.pdf AA battery cell holder CR2032 retainer clip, SMT ( http://www.farnell.com/datasheets/1505853.pdf BC-2001 CR2032 2032 Battery Holder 18650 Battery Holder SMD Tactile Switch, https://www.e-switch.com/system/asset/product_line/data_sheet/165/TL3342.pdf SWITCH SMD KSA SW 4-bit rotary coded switch, through-hole, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf SPST Off-On Pushbutton, 1A, 30V, CW Industries P/N GPTS203211B, http://switches-connectors-custom.cwind.com/Asset/GPTS203211BR2.pdf SPST button switch Off-On CuK sub miniature slide switch, EG series, SPDT, https://www.e-switch.com/wp-content/uploads/2022/06/EG.pdf tactile switch, 7.3mm x 6.25mm package, pitch 0.8mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f100v8.pdf TFBGA-100, 10x10 raster, 8x8mm package, 0.5mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=266, NSMD pad definition Appendix A BGA 256 1 FT256 FTG256 Spartan-7 BGA, 14x14 grid, 8x8mm package, pitch 0.4mm; https://www.latticesemi.com/view_document?document_id=213 UCBGA-49.

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