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An Arduino control pad, often referred to as a keypad, is a matrix of buttons arranged in rows and columns. It is widely used in projects like password-protected locks, menu navigation, calculators, and robotic controls. Keypads are available in various configurations, such as 4x3 (12 keys) or 4x4 (16 keys), and can be easily interfaced with Arduino using the Keypad library.
How Keypads Work
Keypads operate by connecting rows and columns in a grid. When a button is pressed, it creates a connection between a specific row and column, allowing the Arduino to detect the pressed key. This is achieved through a process called keypad scanning, where the Arduino alternates between rows and checks the state of columns to identify the pressed button.
Wiring a Keypad to Arduino
To connect a keypad to an Arduino:
Arduino - Keypad | Arduino Tutorial
Learn how to use keypad with Arduino, how to connect keypad to Arduino, how to code for keypad, how to check keypad password, how to program Arduino step by step.
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