Keypads are mainly used to enter numbers, but can be tailored for a variety of uses. Industrial keypads can be distinguished by how the keypad's buttons are mounted, and the methodology of how the ...

Keypads are usually arranged in a matrix format to reduce the number of I/O connections. A 12-key keypad is arranged in a 3 4 format requiring 7 connections. A 16-key keypad is arranged in a 4 4 ...