date: 2070/04/01
BY:
Name: sanjeev bhusal
Address: devisthan-7,phalewas,parbat
University: tu
Campus: wrc
Name: sanjeev bhusal
Address: devisthan-7,phalewas,parbat
University: tu
Campus: wrc
INTRODUCTION
Due to the need to increase the security of life and properties in our environment, security systems are used as selective systems to decide who has access to a given location based on a personal distinctive trait of the user. From time past until present, security locks usually includes mechanical devices made of forged metal i.e simple lock and bolt, the door chain, pin tumbler lock, the jam lock and padlock etc. Other recently developed security devices are gadgets like laser beam detectors, motion detectors and magnetic card readers. Devices such as motion detectors, light detectors among others are susceptible to be triggered by false signals such as noise, whenever its sensitivity is increased. They are not suitable for the most outdoor security protection due to the fact that they don’t posses high discriminative capability during operation and they are fairly expensive. It is hence imperative to provide a locking device, one which is also efficient and reliable; with high discriminative capability, non reliance on the physical quality of the individual concerned, which when forced open triggers an alarm and which is by far less expensive than their counterparts. This has led to the design and construction of a microcontroller based electronic lock system. It includes using correct personal identification numbers to operate the locking device, by conditioning the access based on the configuration of the security device thereby granting access to the user with correct password [2].
This proposal is complete electronic code lock system, which is designed for full electronically control lock system. It interacts to the user by the means of password which is set by authorized person. With the inputting of correct password user can have the authority to access the features like unlocking door, change date and time, change password, keypad activation time etc. user can see different note in display device LCD, and can give control command through Keypad. RTC provides date, time and password storage facility. Motor is coupled in door or any lock system that is controlled by using door open command and automatically closes after unlocking.
BUZZER system is also applied to alert user if wrong password is attempt by unauthorized user. This multi-functional features project may be applicable in bank, school, office, industry, student’s hostel, military application etc.
SCOPE AND APPLICATIONS
This project has wide range of scope. It can be implemented in other various fields where high security system is required. Apart from house security, it can be used in other sectors like offices, educational institutes, stock markets, etc. Some other applications of this project are as follows:
• It can be implemented in student hostels where bundle of keys needed for different door.
• It can be used in banks for high security system.
• It can be used in office where only employees reaching in time are allowed to enter the office.
• It can be implemented in student hostels where bundle of keys needed for different door.
• It can be used in banks for high security system.
• It can be used in office where only employees reaching in time are allowed to enter the office.
METHODOLOGY
The Electronic Door Lock System will consist of a Keypad, a Real Time Clock (RTC), a microcontroller, and a motor to open and close the door automatically. The Keypad continuously scans for entry of enter key. At that time display device continuously displays the date, time, and the welcome note. When entry button is pressed, user gets enter password noted at display device and the user must enter the right password to unlock the door and access the other features of this project. If wrong password is entered wrong password note “ACESS DENIED” will be displayed. Controller checks either entered password is correct or not. After entering the correct password user will able to open door but access of features like date and time set, change password etc. will require next password which will with the head of that place where this lock system is installed. The head can also set the entry time from the door, except that period of time keypad will be inactive. So this makes able to the head to make strategy as his need. This ensures high security, reliable, and efficient use of this project.
The main modules considered in this project are:
5.1 The Control Unit(Microcontroller AT89S52):
This is main part of our project. Which operates whole system in accordance code written in this. Keypad serves as input of digits and other output devices like LCD, motor, buzzer are connected to it’s different input output ports. This controller is given 5v dc to it’s vcc pin using LM7805 voltage regulator IC. Crystal of 12MHZ is used as a timing generator.
5.2 Real Time Clock (RTC):
It uses internal battery which provides correct date and time, password etc. even if the power is off. Available IC chip is DS12887, which has 128 bytes of non-volatile RAM. Among them 14 bytes of RAM for clock/calendar and control registers, and other 114 bytes of RAM are general purpose data storage where we stores defined password.
5.3 Keypad:
It is input device of our project through which user can give command to controller to do something defined in program. It consists of button from 0 to 9 and also ‘enter’ and ‘cancel’ button in shape of telephone keypad.
5.4 Output devices:
• LCD
LCD (Liquid Crystal Display) screen is an electronic display module and find a wide range of applications. A 16x2 LCD display is very basic module and is very commonly used in various devices and circuits.
• MOTOR
A dc motor of 12v is used to open and close the door according the command given by the controller. This motor is connected in H-bridge format in order to rotate motor forward(open) and reverse(to close) the door. In our project when door open command given by user then door opens and stays open for a few seconds and closes automatically.
• BUZZER
When wrong password is attempt for a repeated time then buzzer blow out indicating wrong user trying to enter the door.
The main modules considered in this project are:
5.1 The Control Unit(Microcontroller AT89S52):
This is main part of our project. Which operates whole system in accordance code written in this. Keypad serves as input of digits and other output devices like LCD, motor, buzzer are connected to it’s different input output ports. This controller is given 5v dc to it’s vcc pin using LM7805 voltage regulator IC. Crystal of 12MHZ is used as a timing generator.
5.2 Real Time Clock (RTC):
It uses internal battery which provides correct date and time, password etc. even if the power is off. Available IC chip is DS12887, which has 128 bytes of non-volatile RAM. Among them 14 bytes of RAM for clock/calendar and control registers, and other 114 bytes of RAM are general purpose data storage where we stores defined password.
5.3 Keypad:
It is input device of our project through which user can give command to controller to do something defined in program. It consists of button from 0 to 9 and also ‘enter’ and ‘cancel’ button in shape of telephone keypad.
5.4 Output devices:
• LCD
LCD (Liquid Crystal Display) screen is an electronic display module and find a wide range of applications. A 16x2 LCD display is very basic module and is very commonly used in various devices and circuits.
• MOTOR
A dc motor of 12v is used to open and close the door according the command given by the controller. This motor is connected in H-bridge format in order to rotate motor forward(open) and reverse(to close) the door. In our project when door open command given by user then door opens and stays open for a few seconds and closes automatically.
• BUZZER
When wrong password is attempt for a repeated time then buzzer blow out indicating wrong user trying to enter the door.
REFERENCES
[1]The 8051 Microcontroller and Embedded System ( Muhammad Ali Mazidi / J.G. Mazidi /R.D. Mc Kinlay) [2]History of Locks and Safe www.freepatentonline.com/History_locks and safe/5775142.html, pp.3-6. [3]The project report on Electronic Door Lock System(BEX/066 BATCH) [4]Teachers of Electronics And Computer Department
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