Matrix Array 3*4 4*4 16/12 tasti interruttore tastiera modulo tastiera fai da te per Arduino
Types: 4x3 and 4x4 Keypad Matrix. Using the Keypad. Button Matrix 1x Keyboard Module. Handle with care to avoid damaging the keys. Safety and Care. 4x4: 16 buttons (0-9, #, , A-D). 4x3: 12 buttons (0-9, #, ).