keyboard – reference circuit

A 2 × 2 key matrix: SW20–SW23 from the rows (GP8, GP9) to an SS14 each, cathodes to the rows, anodes … the columns (GP10, GP11).

Why: A key matrix with a diode per key is the circuit of a keyboard. Its rules hold on every board, so it stands for no domain but core; it holds the diode per key and its direction.

Domains on: core · SVG