UNDERSTANDING THE CONCEPT AND THEORY

Keypad 4 x 3 are used in this project, the reason for using this type of keypad because its easy to be implement and their price much cheaper and easy to buy the item. LCD are use to display bit of password that had been enter by user. User need to enter the password by inserting 6 bit. After that, the PIC 16F877A will trigger the password either true or false. PIC 16F877A are use in this project because their price much cheaper, easy to buy at the market and their data base much larger than other PIC. Its also easy to configurations compare other PIC controller. If true, magnetic door are open and magnetic sensor are off. If false, user will give chance until five times to enter the password. After five times, no more chance and buzzer is on to alerting the user. If locker been theft, magnetic sensor will be on will on transmitter the signal. The transmitter will sent signal to receiver and the signal will show in computer to tell that locker had been theft.