Abstract
The latest uproar in this era is about a technology termed as Light Fidelity or more commonly known as Li-Fi. There are currently two trends being seen: First, the extension or enrichment of wireless services and other being increased in user demand for these services, but the available RF spectrum for usage is very limited. So the new technology of Li-Fi came into picture, which uses visible light as a source of communication. Li-Fi is the most recent development which is resourceful. In this technology, LEDs are used to transmit data in the visible light spectrum. This technology can be compared with that of Wi-Fi and offers advantages like increased accessible spectrum, efficiency, security, low latency and much higher speed. This research paper aims at designing a Li-Fi transceiver using Arduino that is able to transmit digital data. The hardware has been designed using Eagle CAD (version 7.1.0) tool and Proteus design tool (version 8). The software coding is done by using Java (version 8). Successful transmission and reception of text, image and video signals is carried out on the transceiver. Hence this research work gives an innovative way of designing a transceiver which works by using off the shelf low cost components and using visible light spectrum.
Highlights
Visible light communication (VLC) is the term given to an optical wireless communication system that conveys information by modulating light that is visible to the human eye
Communication is achieved by switching Light Emitting Diode (LED) lights on and off at a speed higher than what is perceptible to the human eye
The transmitter and receiver results of Arduino based Light Fidelity (Li-Fi) system is described in the sections below
Summary
Visible light communication (VLC) is the term given to an optical wireless communication system that conveys information by modulating light that is visible to the human eye. Communication is achieved by switching LED lights on and off at a speed higher than what is perceptible to the human eye. A photodiode is a photodetector that produces an electrical current that is proportional to the optical power that is incident on the photodetector surface. This simple principle makes possible visible-light communication technology that supports both illumination and wireless communication using an LED. Unlike RF wireless communication, where specialized tools are needed to find a service area, the presence of a VLC service area will be detected. The visible spectrum is the portion of the electromagnetic spectrum having wavelengths from about 380 nm to 780 nm and in terms of frequency; this corresponds to a band of 385 - 789 THz [1]
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