These keypads are made of a thin, flexible membrane material with snap dome switches providing a positive click feedback. Arranged in a row/column matrix, they can be connection directly to a micro-controller I/O port using the minimum number of I/O pins. The keypads feature a flexible ribbon cable terminated by a 0.1″ single-in-line connector socket.
The membranes have a removable paper backing exposing a strong adhesive providing a simple way to mount the keypad in a variety of applications, e.g. panels or enclosures.