It only opens your door when the correct password is entered. The circuit of this project is very simple which includes Arduino, keypad module, button, servo motor, and LCD. Arduino controls the ...

An Arduino project implementing a security alarm system featuring PIN code access via a 4x4 keypad, status updates on a 16x2 LCD, motion detection using an HC-SR04 ultrasonic sensor, and ...

Connect the VCC pin to the Arduino's 3.3V (not 5V), and GND to the ground rail. For the data connections, wire SDA to Pin 10, SCK to Pin 13, MOSI to Pin 11, MISO to Pin 12, and RST to Pin 9. Wire your ...