4×4 Matrix Keypad (Indian)

This Matrix Keypad 4 X 4 has 16 buttons, arranged in a telephone-line 4×4 grid. The keys are connected into a matrix, hence only 8 microcontroller pins (4-columns and 4-rows) are required to scan the pad.

Specifications of Matrix Keypad 4 X 4:

• Only 8 microcontroller pins are needed to access 16 buttons