Password Based Digital Door Lock Security System Using Arduino & Keypad Circuit Diagram Circuit Wiring Components Pin We need to download the KeyPad library: CLICK Circuit Diagram of Digital Door Lock Security System Using Arduino, 4×4 Keypad module, and Servo motor The buzzer is used for indications.īlock diagram Component Required Components Name The LCD display is used to show the message to the user. The servo motor is used to push (lock) or pull (unlock) the latch on the door. Open button and close buttons are used to open and close the door lock from inside the room. The 4X4 Keypad module is used to type the password or pin. Here we will use Arduino nano but you can choose any other version of the Arduino board which is based on the ATmega328. The Arduino is the brain of the project, that controls the whole system. Password-Based Digital Door Lock Security System is consists of Arduino, 4 x 4 keypad module, servo motor, LCD display, and two switches. In this project, we will enter a password using the keypad to open the door lock using servo motor.
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