THAPAR POLYTECHNIC COLLEGE PATIALA BIKRAMVIR SINGH (E.C.E ) NISHANT SHARMA(E.C.E ) MICROCONTROLLER BASED DIGITAL CODE LOCK

INTRODUCTION Digital code lock is a type of lock in which any combinatio n of 5 digits is used to open the lock. This type of lock use numerical code for authenticati on where the correct code must be entered in order for the lock to deactivate. Digital Code Lock using AT89C2051 is a basic control system with an ability that allows any user having valid user password or Master password to use the system with simple password protection This code can be changed by the user. This circuit is eminently suitable as a digital lock with security option. The lock can be used with an outdoor gate or a normal door. The functionality of this lock is implemented in software When the correct code is entered it will open the door. The significant of this project is to eliminate the need for a key.

NEED OF CODE LOCK There are great varieties of digital code locks. Generally speaking, they can be classified into scores of type, such as electronic lock, fingerprint lock, card lock biological lock, etc. This kind of lock can avoiding the problems caused by the copying of keys. On the premise that it’s safety is high, it’s another feature without key is getting more and more favour of people

OBJECTIVES To free users from the worry of remembering keys To design a keyless door entry by using electronic digital lock code To avoid any crimes especially stealing activities

BLOCK DIAGRAM

SIMULATION SOFTWARE (PROTEUS)

WIRING CIRCUIT

ADVANTAGES NO NEED TO POWER OFF THE SYSTEM 1. WHEN SYSTEM IS BLOCKED AFTER UNSUCCESFUL ATTEMPTS THEN JUST ENTER THE MASTERCODE,THE SYSTEM WILL BE UNBLOCKED.SO THERE IS NO NEED TO ‘POWER OFF’ THE SYSTEM FOR RESETTING. NO NEED TO ENTER CODE TO LOCK AGAIN 2. THERE IS NO NEED TO ENTER THE SECURITY CODE TO LOCK THE SYSTEM AGAIN, JUST PRESS THE ‘#’ KEY TO LOCK AGAIN. PREVENTION FROM HACKING 3. EVERYTIME THE SECURITY CODE CHANGES IT IS NOT SAME FOR ALL THE CASES, AND THE PERSON WHO KNOW ABOUT THE SYSTEM THOROUGHLY ONLY HE CAN CHANGE THE CODE.SO THIS THING PREVENTS THE SYSTEM FROM HACKING.

FUTURE ENHANCEMENTS CONTROLLING ELECTRICAL DEVICES 1. ELECTRICAL DEVICES SUCH AS LIGHTS, COMPUTERS CAN BE CONTROLLED BY USING SEPARATE PASSWORDS AS AN ATTENDANCE REGISTER 2. We can use this system as an attendance register for the students to enter a class room with their respective password. TIGHT SECURITY 3. The system can be easily connected to the personal computer for further control. Other than the speaker sounds, all the lights can be made to turned on if password entered is wrong for three times and also a hidden camera can be used to record the faces who trespassed.

APPLICATIONS INDUSTRIAL FACILITIES CONVENTIONAL HALLS WARE HOUSES TECHNOLOGY CENTERS PSHYCATRICS CARE CENTERS COMMERCIAL BUILDINGS AIRPORTS, CIVIL TRANSPORT MUSEUM GOVERNMEN T AND MILITIARY

CONCLUSION This digital code lock is therefore particularly useful in applications such as hotel room door locks, residential housing and even office buildings. We feel that this digital code lock is very marketable because it is easy to use, comparatively inexpensive due to low power consumption and highly reliable Lock which contained hardware and software development. We also know and understand the microcontroller AT89C2051 and how to implement it on my project