Password Based Door Locking System Using Arduino

A Password-Based Door Locking System using Arduino is an innovative security solution that allows access control through a digital password rather than traditional keys. This system comprises several components, including an Arduino microcontroller, a keypad, an LCD display, and a locking mechanism such as a solenoid lock.

Note: You can download the project files, source code, and find purchase links for all components below👇

Password Based Door Locking System using Arduino represents a modern approach to home and office security, combining simplicity with advanced technology. This system leverages the Arduino microcontroller's versatility to manage and control access through a digital password, ensuring that only authorized individuals can unlock the door.

Components:

  1. Arduino Microcontroller🛒: The brain of the system that processes input and controls the locking mechanism.

  2. Keypad🛒: Used by the user to input the password. Typically, a 4x4 matrix keypad is used.

  3. LCD Display🛒: Shows the status messages and guides the user through the process.

  4. Solenoid Lock🛒: An electrically controlled lock that engages or disengages based on the input receive or you can also go with servo motor🛒

  5. Power Supply🛒: Powers all the components of the system.

  6. Connecting Wires and Resistors🛒: Facilitate the connections between components.

Working Principle:

  • Password Entry: The user enters a pre-defined password using the keypad.

  • Password Verification: The Arduino microcontroller compares the entered password with the stored password.

  • Access Granted/Denied:

    • If the password matches, the Arduino sends a signal to the solenoid lock/servo motor to disengage, unlocking the door. The LCD displays a message indicating that access is granted.

    • If the password is incorrect, the lock remains engaged, and the LCD displays an "Access Denied" message.

  • Reset and Lock: After a brief period, the system resets, re-engaging the lock to ensure security.

    Circuit Connections:

Keypad Connections :

  • R1 to Digital Pin 0

  • R2 to Digital Pin 1

  • R3 to Digital Pin 2

  • R4 to Digital Pin 3

  • C1 to Digital Pin 4

  • C2 to Digital Pin 5

  • C3 to Digital Pin 6

LCD Connections:

  • RS to Analog Pin 4

  • E to Analog Pin 5

  • D4 to Analog Pin 3

  • D5 to Analog Pin 2

  • D6 to Analog Pin 1

  • D7 to Analog Pin 0

  • VSS to GND

  • VDD to +5V

  • V0 (contrast) to the middle pin of a 10k potentiometer

  • RW to GND

Servo Motor:

  • Signal pin to Digital Pin 9

  • VCC to +5V

  • GND to GND

Download the arduino code from here✋:

Download the proteus project from here✋:

Additional Features:

  • Change Password: An option can be provided to change the password through a special administrative mode.

  • Security Alert: The system can be programmed to trigger an alarm after a certain number of incorrect attempts.

  • Battery Backup: Ensures that the system remains operational during power outages.

Benefits:

  • Enhanced Security: Provides a secure method of entry that is harder to bypass than traditional locks.

  • Convenience: Eliminates the need to carry keys, reducing the risk of losing them.

  • Customizability: The system can be tailored to include additional features such as remote access control and integration with smart home systems.

Applications:

  • Residential Homes: For securing main doors, garage doors, and other entry points.

  • Commercial Buildings: To control access to offices, storage rooms, and restricted areas.

  • Institutions: Useful in schools, colleges, and other institutions for securing labs, libraries, and administrative offices.

A Password-Based Door Locking System using Arduino is a robust, user-friendly, and highly effective security solution that leverages digital technology to enhance traditional locking mechanism

Feel free to reach out with any suggestions🤔 or project ideas 💡 at "virtualengineerve@gmail.com"

or leave a comment on our YouTube video.

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