Door Security System

Electronic lock takes inputs from the user with the help of 4X3 keypad. PIC16F877A microcontroller reads these inputs and compared it with a already stored password. Default password 1212* is stored in EEPROM of PIC microcontroller. After taking inputs from a user, these inputs are stored in array. After that microcontroller compares these arrays values with already stored valued of a default password. If both the values are equal microcontroller opens the electronic lock. . LCD is used to display the status of password protected secured system. If user input password is equal to EEPROM stored password. . PIC provides instructions to LCD about what to display and what not to display. . You can use a light emitting diode to display status of electronic lock. the red LED remains on when lock is closed and the green LED remains on when lock is open. . For example in home devices control system project, you can use password to provide access to control of devices to only specific persons.