ENGLISH

Abstract

2 ABSTRACT: Light Emitting Diodes are set to penetrate many areas of everyday life. An interesting property of these devices in addition to their lightening capabilities , is that they can also be utilised for data transmissions as well. LED's require low power for their operation and have very high switching speeds. This dual purpose application can reduce our dependency on the densely used means of communication the Radio frequency communication.. Visible light communication (VLC) technique using White Light Emitting Diode (LED ) is a promising technology for next generation communication for short range , high speed wireless data transmission. LEDs have a number of advantages, one of which is long life expectancy. LEDs' ability to transfer information signals over light makes it a very good communication medium. Now the light we use in our daily life is not only be used for providing light but also for communication. However, like many emerging technologies, VLC has many technical issues that need to be addressed. Using visible light for data transmission entails many advantages and eliminates most drawbacks of transmission via electromagnetic waves outside the visible spectrum .In this paper, inexpensive transmitter and receiver of (VLC) system is designed and implemented experimentally for transmitting data between two computers using Hyper Terminal software.