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Advanced VLSI Design, Analog Electronics, Digital Design, IC Applications, Innovative, Microcontroller Based Projects, Sound Engineering

Password Based Door Locking System





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AIM

The main objective of this project is to implement an Pass word Based Door Locking System Using AT89c51 Microcontroller.

ABSTRACT

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. 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 the 8 bit microcontroller AT89C51 which has a 2Kbytes of ROM for the program memory. The password is stored in the EPROM so that we can change it at any time.

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 Stepper motor rotate forward side so that the door is opened. If we entered a wrong password for more than three times then the Alarm is switched on. When we go inside and come back then the microcontroller will sense the person using the IR, the microcontroller will automatically open the door for you.

The default password is 1111 and you can change the password by dialing 1234, old password, and new password #button. for example if you want to change the password from the default to 4523 then dial 123411114523# after dialing you can hear a beep sound which confirm the operation goes successful.

Block Diagram

Password Based Door Locking System-BLOCK DIAGRAM

Hardware requirements

  • AT89c51 Microcontroller
  • LCD
  • Stepper motor
  • Keypad
  • ULN2003 Motor Driver
  • 5V Buzzer

Software used

  • Embedded C
  • KEIL Demo Version with Simulator

Applications Areas

  • Home
  • Bank

Abstract

JJ

This is Mr.Jose John, 21 yrs old guy, currently pursuing final year mechanical engineering, now become an enthusiastic blogger and a successful entrepreneur.
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About admin

This is Mr.Jose John, 21 yrs old guy, currently pursuing final year mechanical engineering, now become an enthusiastic blogger and a successful entrepreneur. Connect with him on:

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