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The proposed system implements a password protected electronic lock that provides a great benefit over a traditional lock, as well as great security. The system comprises of a keypad and 16x2 LCD along with a PIC18F452 microcontroller. The present state is notified by the LCD to the user. User can perform operations such as opening and closing the lock, changing the current password through keypad instruction. The aim of this project is to make such type of lock which will ensure security as well as cost efficient implementation. Password protected electronic lock comprises of keypad as input, LCD display as output device and microcontroller as controlling unit. The lock system is protected by a password which is set by the user. The lock is opened only when the correct password is inserted. On the other hand, Password changing option is somehow more secured, that only authorized person can do it. While changing password a fixed security code (known to authorized person) along with the old password is needed. Thus the enhanced security of the system is ensured. Keywords— RIFD, PIC18F452 microcontroller, LCD, Servomotor.

Password Protected Electronic Lock System for Smart Home Security