[attachment=7238]

ABSTRACT

Engineering is not only a theoretical study but it is a implementation of all we study for creating something new and making things more easy and useful through practical study. It is an art which can be gained with systematic study, observation and practice. In the college curriculum we usually get the theoretical knowledge of industries, and a little bit of implementation knowledge that how it is works? But how can we prove our practical knowledge to increase the productivity or efficiency of the industry?

Don’t take the chance of becoming victim of burglary, which is often accompanied by violence. Protect our family and valuables with this microcontroller based security system that will let us rest our head knowing that should anyone trying to break into our home, an alarm will go off and the police will be alerted immediately.
The transmitter section continuously transmits IR rays which are received by the receiver section. The received signal is further amplified and given to the PLL section, where its frequency is locked to the transmitted frequency.
When the IR signal is interrupted, the microcontroller starts working as per the program burnt into the EPROM and control the siren, telephone and cassette player via the respective relays.