4 layers51 × 82 mm

Boards in 2 GitHub repositories, designed in KiCad, that use the D2F-FL by Omron (-40℃~+85℃ 1,000,000 cycles 30V PC Pin SPDT 插件 Limit Switches ROHS). See how each wires it, with its parts, size, README and files; the D2F-FL’s symbol, footprint and pinout are on its own page.


xunker/worst_keyboard_ever
It's a mechanical keyboard made from limit switches. It has QMK firmware, it's worse than you think, but better than you expect.