27-07-2012, 04:47 PM
LUGGAGE SECURITY SYSTEM
LUGGAGE SECURITY SYSTEM.pptx (Size: 279.62 KB / Downloads: 61)
TRANSMITTER
SPECIAL PURPOSE LED TRANSMITS INFRARED RAYS
MADE OF GALLIUM ARSENIDE OR ALLUMINIUM GALLIUM ARSENIDE
APPEARANCE SAME AS A COMMON LED
HUMAN EYE CANNOT SEE THE INFRARED RADIATIONS
CAMERA ON A CELLPHONE CAN BE USED
USED AS SENSORS
RECIEVER
We see colors and act depending on the different things seen. The phototransistors does the same thing, if reacts depending upon the intensity of infrared light being shined at it.
APPLICATIONS
Airprots
Museums
Shopping Malls
Theaters
Temples and Pilgrimage places etc