Security is a prime concern in our day-today life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. By using this system we can unlock the door by using pre-decided password, increase the security level to prevent an unauthorized unlocking. In case the user forgets the combination of password this system give the flexibility to the user to change or reset the password. This automatic password based lock system will give user more secure yet cost-efficient way of locking-unlocking system. The microcontroller based Door locker is an access control system that allows only authorized persons to access a restricted area. The system is fully controlled by microcontroller which is interfaced with peripherals like keypad, LCD, Motor and Buzzer. The system has a Keypad by which the password can be entered through it. When the entered password equals with the password stored in the memory then the Arduino will open the door through servomotor after certain time it will closed automatically. If the password is wrong then door would remain closed, denying the access to the person and Buzzer will beeps automatically.

Features:

1. Unlock the Door by using pre-decided password.
2. Increase the security level to prevent an unauthorized unlocking of the door.
3. Give the flexibility to the user to change or reset the password in case the user forgets that combination.
4. Lock the door by using password( preferable the same password used for unlocking)
5. To give user more secure yet cost-efficient way of door locking-unlocking system.

Advantage of Our System:

•  No keys to be lost, stolen or occupied.
•  Can be locked using keypad.
•  Automatic door opening /closing.
• Gives an indication for unauthorized entry. Totally cost efficient.

The learning’s provided by the project are:

• Interfacing of LCD with Microcontroller.
• Interfacing of SERVO motor with Microcontroller
• Embedded C programming with controller.

The major building blocks of this project are:

1. Regulated Power Supply.
2. ARDUINO UNO Microcontroller.
3. LCD with driver.
4. Servo motor.
5. Buzzer.
6. Keypad.

Software’s used:

1. Arduino IDE Studio Compiler for Embedded C programming.
2. Express SCH for Circuit design.

     

   

Regulated power supply:    

   

   

 

Block Diagram:    

   

   

   

video: