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Overview A keypad is a device that can be used to receive input data from user. In this project, you will first learn how to interface a 4x4 keypad with Arduino, and then you will Build a simple calculator using a keypad. What You Will Learn What is keypad Different kind of keypads How does keypad work How to interface keypad with Arduino How to interface keypad in different methods Build a calculator How Does A Keypad Work? Since past until now, there has been various methods to en...

Learn how to interface a 4x3 membrane matrix keypad with Arduino using this comprehensive tutorial. By following the steps outlined below, you can easily connect the keypad to your Arduino and start using its 12 buttons with only 7 pins on the microcontroller. Features of the 4x3 Matrix Keypad Keypads are one of the most popular components that are widely used in electronics. Everybody can communicate with the system by switches. Normally, every key occupies one digital pin of the microcontroller. But by us...