HOME SECURITY BASED ON LASER LIGHTING SYSTEM

Abstract

Security is a most important factor today. Technology develops day by day in the world. The
crime gang also improves their technology to perform their operation. So technology of security should be
modern with time to protect the crime works. We decide to make a security project as our project. In this project
we have used laser light to cover a large area. We know laser light goes through long distance without
scattering effect. It's also visible only at source and incident point, otherwise invisible. These two properties
help us to build up a modern security system, which may name as "laser security”. LASER-Ray goes through
long distance without scattering effect and the Ray is almost invisible. Only the radiation point and incident
point is visible. So by this security project we can make an invisible boundary of a sensitive area. There are two
parts of the system. One is transmitter and other is receiver. The transmitter part is built with a LASER
radiator, a pair of dry cell batteries, an on-off switch and a stand to hold it. The receiver side, there is a focusing
LDR (Light depending Resistor) sensor to sense the LASER continuously. The LDR sensor also holds with a
stand and it connected with the main driver circuit. When anybody crossover the invisible ray the main circuit
sense the discontinuity by sensor and turn on the alarm circuit. If once the alarm zcircuit is on it will still
ringing until push the reset button. The system has built with low cost and high performance. The power
consumption of the system is very low. Wi-Fi (Short for Wireless Fidelity) is a wireless technology that uses
radio frequency to transmit data through the air. Wi-Fi has initial speeds of 1mbps to 2mbps. Wi-Fi transmits
data in the frequency band of 2.4 GHz. It implements the concept of frequency division multiplexing technology.
Range of Wi-Fi technology is 40-300 feet.