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ABSTRACT for MINOR PROJECT

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MINOR PROJECT ON DIGITAL SECURITY LOCK Abstract:-This project shows how we can interface a numeric keypad , LCD display and a motor to microcontroller.The code is asked to be entered through keypad with a message on LCD “ENTER THE PASSWORD”.As the correct code is entered motor rotates.But on the entry of wrong password following message is displayed in LCD “WRONG PASSWORD”. In todays world security is main issue. This Project is used as a lock for safe to protect the confidentials and other expe
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  MINOR PROJECT ON DIGITAL SECURITY LOCKAbstract:- This project shows how we can interface a numeric keypad ,LCD display and a motor to microcontroller.The code is asked to beentered through keypad with a message on LCD “ENTER THEPASSWORD”.As the correct code is entered motor rotates.But on the entryof wrong password following message is displayed in LCD“WRONG PASSWORD”.In todays world security is main issue. This Project is used as a lock forsafe   to   protect   the confidentials and other expensive things.   The project isbuilt around 8051 microcontroller. Microcontroller continuously scans thekeypad . As a key is pressed controller detects it.First of all as we switch on the circuit a message is displayed on LCDconcerning to entering the password. Password is entered through anumeric keypoad which is attached to one of the port of microcontroller.As we enter the code , controller compares the entered passwordwith the correct password which is burned into it. If the password ismatched then stepper motor or simple motor which is attached to doorrotates and door will open.If the password is incorrect then door will notopen and “Wrong code” message is displayed on LCD.Numeric keypoad which is attached to one of the port of microcontroller. Keypad is a 4x3 keypad that is contains 4 rows and 3columns , containing keys from 0 to 9 and  * ,# keys . Hence keypad willoccupy 7 I/O lines (4 orws+3 columns) of microcontroller,while 1 portcontains 8 I/O lines.  Program is to be written in C language and is to be  compiled using KEIL C software.After obtaining Hex file of code HEX file is burned intomicrocontroller using a MICROCONTROLLER PROGRAMMER  or BURNER  . Description A 4x3 matrixkeypadand a 16x2LCDhave been used here. Keypad and LCD are very commonly used input & output devices, respectively. A fourdigit predefined password needs to be specified the user. This password isstored in the system.While unlocking, if the entered password from keypad matches with thestored password, then the lock opens and a message is displayed on LCD.Also an output pin is made high to be used for further purpose.The connections in the circuit are as following: port P2 of microcontrollerAT89C51is used as data input port which is connected to data pins (7-14)of LCD. P3^0, P3^1 and P3^2 pins of microcontroller are connected tocontrol pins RS, RW and EN of LCD. Port P0 is used to take input fromkeypad. P0^7 has been used as lock output pin of controller. As the program starts, string ‘Enter Password’ is displayed on LCD. Thekeypad is scanned for pressed digits one by one. Every time, row andcolumn of the key pressed is detected and a ‘*’ is displayed on LCDcorresponding to the entered number. After the four digits are entered,the user is prompted to ‘Confirm Password’ and again the input is takenthrough LCD. If the passwords do not match, a message is displayed toindicate ‘Wrong Password’; otherwise the user is prompted to unlock thedevice. To unlock, user needs to ‘Enter Password’ through keypad. Again thekeypad  is  scanned  for  pressed  keys  and  corresponding  digits  areidentified. The passkey is displayed as ‘****’ on the LCD screen. After thefour digits are entered, they are compared with the pre-set password. If all the four digits match with set password, LCD displays ‘Lock Open’ andthe lock output pin goes high. If the security code is wrong, ‘Wrong  Password’ is sent to be displayed on LCD. The system gets locked if morethan three attempts are made with wrong password to open the electroniclock. The system needs to be reset in such a case.GROUP MEMBERS :-1. ABDUL MAJEED2. IFTIKHAR ALI3. JAIKISHAN TAK4. AJAY VYAS5. ABHIMANYU  CIRCUIT DIAGRAM :-
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