1. Home Security.

Door and window can be monitored using proximity switch connected to PIC16F877A. Buzzer also can be connected to PIC16F877A to produce alarm sound. For a user to enter secret PIN number, keypad should be connected to PIC16F877A. Program can be written to perform all of the task required such as to enter PIN number, to verify PIN number, to monitor door status and also to trigger the alarm sound. The buzzer use should be a very powerful buzzer with a loud sound.

2. Dark Sessor

PIC16F877A has a build in comparator. Therefore Light Dependent Resistor can be connected to the comparator input to sense when it is dark and will trigger a relay to turn ON light.

3. DTMF Dialer.

PIC16F877A can produce DTMF tone to dial a telephone number. This feature can be added together with the home security alarm.

4. Data Logger

PIC16F877A can be connected with thermistor to monitoring temperature and store it into internal EEPROM. After 1 week all of the data recorded can be sent to a PC through RS232 cable. The PC should have database application that will accept all data from the PIC16F877A.

5. LCD Controller

PIC16F877A can easily be connected to LCD. Only 10 pin is required to do this. Simple C command available to display character onto the LCD screen. For example to display a word "GOODBYE" just use command : lcd_putc("\GOODBYE\n");.

 

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