A 4x4 membrane keypad is a compact and a cost-effective input device that is commonly used in a variety of electronics projects. It consists of 16 buttons arranged in a 4x4 grid and is covered with a ...

Pin 1 - 4 (L -> R) of the keypad module connects to the Pin row_1 - row_4 of Arduino. Pin 5 - 9 of the keypad module connects to the Pin col_1 - col_4 of Arduino.

In this project, we have the above mentioned components and the working is quite east to understand .The input will be taken from the user through the matrix keypad. At first we have to give The Hour ...