This project implements a password entry system using Arduino, where users enter a 4-digit password via a keypad, and the entered password is displayed on an LCD. If the password matches the preset ...
DESCRIPTION : This project demonstrates how to interface a 4x4 matrix keypad with an LCD (16x2) display using an Arduino board. The system captures key presses from the user via the keypad and ...
// C++ code // include the library code: #include // initialize the library with the numbers of the interface pins LiquidCrystal lcd(12, 11, 5, 4, 3, 2); int ultrasonic = 0; long ...
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