A person gets frustrated when he faces slow speed as many devices are connected to the same network. As the number of people accessing wireless internet increases, it’s going to result in clogged airwaves. Li-Fi is transmission of data through illumination by taking the fiber out of fiber optics by sending data through a LED light bulb that varies in intensity faster than the human eye can follow. As Li-Fi is considered to be the optical version of Wi-Fi, some label it as fast and cheap wireless communication system. When LED is on digital 1 is transmitted and when it is off 0 is transmitted. Data can be encoded in the light by varying the flickering rate to generate strings of 1s and 0s. The output appears to be constant to the human eye as the LED intensity is modulated rapidly. This method of using rapid pulses of light to transmit information wirelessly is technically referred to as Visible Light Communication (VLC). Advancements promise a speed of 10 Gbps. Li-Fi can work even underwater. If this technology can be put into practical use, every bulb can be used something like a Wi-Fi hotspot to transmit wireless data and will proceed toward a cleaner, greener, safer and brighter future. As the growing number of device accessing wireless internet are coming into use airwaves are becoming increasingly clogged making it more and more difficult to get a reliable, high speed signal.

Photodiode Microcontroller