4x3 matrix keypad

4x3 Matrix Keypads are somehow very popular among makers. A small box-like device that with 12 buttons layed out in a 4 by 3 matrix. A number or a symbol appears on each button for easy data input.

A 4x3 matrix keypad is sending signal to a microcontroller when you press the button. Your microcontroller then deciphers which of the number or symbol you pressed. That way you’d be able to type information into a device with a keypad. The keyboard is small, uncomplicated and favored by many gadgets.

How to Use a 4x3 Matrix Keypad for Inputting Data

CODE Using the 4x3 matrix keypad is a piece of cake. If you want to type a number or a symbol, tap the key that corresponds to what you’d like. If you want to type 5, for example, press on the button with that number. If you’d like to input a symbol such as * then push the button containing that symbol. The keypad observes your entry and passes it to the microcontroller.

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