Hello everyone! I hope you all will be absolutely fine and having fun. Today, we are going to work on Arduino Keypad Interfacing . First of all, I would like to tell you a bit about the keypad. After getting the basic idea about the keypad, we will start our discussion about Arduino Keypad Interfacing. You should also have a look at Interfacing of Keypad with PIC Microcontroller . In this tutorial, I am going to use a 4×4 keypad. It has sixteen buttons having four alphabetic characters. Let's have a look at the Arduino Keypad Interfacing: What is Keypad? The keypad consists of multiple buttons, arranged in the form of a matrix(rows & columns) and is used in embedded projects. They are cost-efficient and are easily available from online electronic stores. Keypads are normally available in a ...