Arduino in Tinkercad circuits, we can build a password-based security system. To allow the user of entering a password, 4×4 keypad module is accompanied with a 16×9 LCD display. Basically, LCD display allows the user of entering a password by the keypad module. The first-time password is “123456”, according to the provided code. When the system is unlocked, the LCD display shows a message of “Door is Open”. Also, that is controlled and relayed with the Arduino. The data such as the correct passcode, are saved in the Arduino Uno. by Aya Abd AlKarim Yousef
