It is the technology used for high rate transmission of data

1. BY
PAVAN KUMAR.DEVABHAKTHUNI

2. OBJECTIVES
What is Li fi??
Construction of Li fi???
Working of Li fi!!!
Comparison between Wi-Fi and Li-fi
How Li-fi is different??
Applications of Li-fi…..
Advantages of Li-fi…….
Conclusion……

3. What is Li-fi????
Li-fi stands for LIGHT FIDELITY
Li-fi is transmission of data
through illumination sending data
through a LED light bulb that varies
in intensity faster than the human
eye can follow

4. Construction of Li-fi??
The Li-fi product consists of 4 primary
sub-assemblies:
 Bulb
 RF Power Amplifier Circuit(PA)
 Printed Circuit Board(PCB)
 Enclosure

5. Working of Li-fi!!!!
Its working is much simply explained as
follows:
 If the LED is on, the digital “1” is
transmitted.
 And it is off, the digital “0” is
transmitted.
 It is possible to encode data in the
light by varying the rate at which the
LED’s flicker on and off to give different
strings of 1s and 0s

6. Comparison between Wi-Fi and Li-fi
s.no parameter Li-fi Wi-Fi
1 SPEED >1 GB/s Around 150Mb/s
2 Medium of data transfer Use light as carrier Use radio spectrum
3 Spectrum range Visible light has 10000
times more
Having less spectrum
than VLC
4 cost Cheaper expensive
5 Network topology Point to point Point to point
6 Operating frequency Hundreds of Tera Hz 2.4 GHz

7. How Li-fi is different??
Li-fi technology is based on the LED’s for the transfer of data.
The light can belong to any part of the spectrum, irrespective
of the regions
Also, the speed of the internet is incredibly high and you can
download movies, music, games in just few minutes
You no more need to be in a region that is Wi-Fi enable to
have access to the internet

8. Advantages of Li-fi
It is possible to achieve more than 10 GB/s
Mostly powered by LED’s so it is cost efficient
Transmission of data is fast and easy
Its main advantage is it’s band with is 10000 times
than the radio waves

9. Applications of Li-fi
Cheaper than Wi-Fi, since visible light spectrum
is a visible light spectrum
No licence needed
Thousands and millions of street lights can be
converted in to Li-fi spots

10. CONCLUSION
The possibilities are numerous and can
be explored further. If this technology
can be put into practical use, every bulb
can be used something like a Wi-Fi
hotspots to transmit wireless data

11. Thank you
ANY QUERIES……..