Data Transfer using Visible Light Communication

Abstract: The visible light communication (VLC) refers to the communication technology which uses the visible light source as a signal transmitter, the air is used as the transmission medium, and the appropriate photodiode as a signal receiving component. Visible light should be considered as the medium for wireless transmission because it has got few advantages over other standard wireless transmissions. LED's can be switched on and off faster, which helps for data transmission. To encode data in the light can be done by varying the rate at which the light flicker ON and OFF to give different strings of 1s and 0s. The intensity of the light is modulated so rapidly that human eye can't detect, so the output appears to be constant. The photo detector at receiver side receives different strings of 1s and 0s and receiver decodes it in its original form. This data then can be saved to receiver computer. In this way data can be transferred from one computer to another computer. Keywords: Visible Light Communication (VLC), LED, Light Sensor (Photodiode), Data Transmission