4x4 keypad demo and its working | Tenet Technetronics
In this video, I will show you how to use a 4x4 keypad with Arduino and display the pressed keys on an LCD screen. A 4x4 keypad is a matrix of 16 buttons arranged in four rows and four columns. It can be used to input numbers, letters, passwords or other commands. The keypad works by scanning the rows and columns and detecting which button is pressed. The Arduino reads the keypad and sends the corresponding key to the LCD screen. This is a simple and useful project that can be applied to many applications such as calculators, security systems, lockers, etc.
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