Transferring Data Using a Visible Light

Abstract

This project aims to demonstrate the availability and usability of a basic Li-Fi system that can be manufactured and utilised in daily life starting with the fundamental tools. We present a novel method of data transfer that combines sustainable energy harvesting with high-speed communication (using Li-Fi technology). This makes it suitable for a range of applications, such as secure data communication, Internet of Things (IoT) devices, and wireless sensor networks. A light communication system called Li-Fi uses modulating circuits and regular LED bulbs. We shall explain in this how light from an LED diode is utilised as a transmission medium for this purpose. Compared to Wi-Fi, it transfers data more quickly. In the experimental setup, modulated light signals are emitted by LEDs and detected by solar cells that have photodetectors installed. To recover the transmitted data, the receiving signal must be decoded. Light from the source is directed through a plane convex lens to minimise losses at the lowest levels. If the light source is precisely at the focal point, the light rays on the exit will extend nearly parallel and strike the solar cell with the least amount of loss. It also emphasises how this technology will be used in the future. Additionally, it showcases the technology that will enable data transfer at the speed of light in the future and make efficient use of the light spectrum to connect gadgets to the internet. ex. Organization v2v(vehicle-to-vehicle), Smart mirror, Indoor navigation in building and landscapes, Hospital and health care...etc.,