Li-Fi KIT

lifi technology kit is available in market, kit is around rs-2000 to 6000 variant.

           A high-brightness light-emitting diodes. if the LED is ON, user can transmit a digital content.  It can be switched ON and OFF very quickly, which gives instant opportunity for transmitting data. It is possible to encode data in the light by varying the rate at which the LEDs flicker ON and OFF to pass different strings of 1s and 0s. The modulation is so fast that the human eye doesn’t notice. There are over 14 billion light bulbs used across the world, which needs to be replaced with LEDs ones that transmit data.

Features:

• It can transmit data 38400 baud rate serialy.
• Distance can be acheived 1 Feet to 10 Feet for wireless open optical communication*.
• High intensity LED matrix.
• High quality PCB FR4 Grade with FPT Certified.

Applications:

• Indoor wireless open optical communication.
• Indoor navigation.
• Under water visible light communication.
• Smart indoor blind assistive application.
• Vehicle to vehicle communication.

I/O connections:

Single panel will give you the the distance maximum up to 1Ft-30CM. By cascading 4 LED panel you can communicate  with distance of 120CM.

References:

http://researchdesignlab.com/wireless/li-fi/li-fi-visible-light-communication.html

https://www.youtube.com/watch?v=RUXbdJtqnIQ

Li-Fi Technology

Li-Fi

Li-Fi is  a wireless communication technology, Light Fidelity is in short form, high speed and fully networked wireless com. The term named by Harald Hass and it is visible light communication influenced by RF communication (Wi-Fi or cellular network )

                It is developed for data broadcasting and it is measured to be about 100 times faster than recent technology, reaching speed of 224 gigabits per second. Part of optical wireless communication (OWC) technology proposed to the RF bandwidth limit.

Technology

                This OWC technology uses light from LEDs as a medium to deliver networked, mobile, high-speed communication similar to wi-fi. This optical communication is visible to human eye and light waves cannot penetrate the walls, so in open area it will reach to communicate – if any obstacles light medium is lost. It is more secure like wifi from third party hackers.

Usage

                Lifi is a modern communication technology, has the advantage in aircraft, hospitals, nuclear plants without causing electromagnetic interference. Both wi-fi and li-fi transmit data over the electromagnetic spectrum, whereas wi-fi uses radio waves, li-fi uses visible light. Wi-fi have a limitation to transfer the data in speed limit but in li-fi don’t have such limit, it transmits in GBs.

In future li-fi replaces the wi-fi technology for mobile communication especially for internet and sharing purpose, Instead of wifi hotspot this tech beyond the limitations. Wifi is in limited range and it stuck with limited users and speed of data transfer, not in case of lifi.

References:

https://en.wikipedia.org/wiki/Li-Fi

http://www.yuvaengineers.com/li-fi-technology-in-wireless-communication-revathi-ganesan/

http://www.ted.com/talks/harald_haas_wireless_data_from_every_light_bulb.html