International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 08 | Aug 2020 www.irjet.net p-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 2224 PC to PC Data Transfer using Li-Fi Ambika Neelopant 1 , Madhuri Yavagal 2 , Rachita Byahatti 3 1-3 Student, Dept. of Electronics and Communication Engineering, SDMCET College, Karnataka, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - The role of communication is very critical in day to day life. Communication can be of two types: wireless or wired communication. Wireless communication is usually preferred over wired communication. Light Fidelity is abbreviated as Li-Fi. In 2011, in a TED Global Talk on Visible Light Communication, a German physicist Harald Haas introduced this technology. Li-Fi employs the visible light band within the spectrum of electromagnetic waves. This band is ten thousand times the size of the RF band and cannot be overloaded. Light waves may be modulated to hold large portions of simultaneous data, at very high speeds. Data transmission using Li-Fi is hundred times faster when compared to data transmission using Wi-Fi. In this paper, we present new mode of communication between two laptops or PC’s using Li-Fi technology. Li-Fi refers to wireless communication systems that use light from LEDs as a medium rather than conventional RF, as used in Wi-Fi technology. Li-Fi yields enhanced bandwidth, performance, connectivity & security compared to Wireless Fidelity. One of the benefit of Light Fidelity is that it can be used in electromagnetically subtle conditions such as airlines and thermonuclear energy stations without any interference. Key Words: LED, Li-Fi, Radio Frequency, USB to TTL converter, Visible Light Communication, Wi-Fi. 1. INTRODUCTION With globalization and society-wide need for networking, there is increasing need for cellular networks and their usefulness, and growth in user counts that use the Internet, limited bandwidth capacity makes it even harder to enjoy high data transfer speeds and connect to a stable network. Due to the reduced bandwidth available in the RF range, this tool would reach the critical threshold very soon. Radio waves, that can be used for transmitting data are only a minor portion of the electromagnetic spectrum. There needs to be a way to defeat imminent exhaustion. Li-Fi has a much wider data transmission spectrum. The fundamental concept behind this invention is the propagation of data through LED illumination, through changing light intensities that cannot be determined through human eyes. In reality, light has been a big part of our lives for thousands and thousands of years, and has no great ill impact. Li-Fi will have a crucial contribution towards the easement of the massive load which the present wireless network is facing. It can deliver additionally a frequency band of 400THz compared to the one present in Radio Frequency communication which is 300GHz. Fig -1: Li-Fi system connecting devices in a room 1.1 Comparison between Wi-fi and Li-fi Feature Wi-Fi Li-Fi Full Form Wireless Fidelity Light Fidelity Data Rate 150Mbps >10Gbps Operating Range 100 meters Inside a confined area or 10 meters Operating Frequency 2.4GHz to 5GHz 400THz to 800THz Security Not Secured: can be hacked Secured: cannot be hacked IEEE Standard IEEE802.11 IEEE802.15.7 2. ARCHITECTURE AND WORKING Li-Fi, that might be the inevitable technique for data transmission has all the earmarks of being a straightforward and reasonable optical Wi-Fi adaptation. It uses quick variations in light to communicate information. When the LED is ON it will send a binary 1, if it's off it’ll communicate a 0. We simply have to alter the frequency with which the LED's glimmer pertaining to the information that needs to be encoded. The central components in a Core Li-Fi set-up includes: a) A luminosity Light Emitting Diode which acts as a source of transmission