Li-Fi is a visible light communication technology that uses light from LED bulbs to transmit data wirelessly. It consists of printed circuit boards, power amplifiers, bulbs, optics, and enclosures. Data is transmitted by turning the LED bulb on and off very quickly to send 1s and 0s, allowing for high-speed and highly secure internet access. However, it requires line of sight and does not work in the dark or outdoors like Wi-Fi.

1. By,
Surabhi

2. Recalling Li-Fi..
Li-Fi is a VLC, i.e.., Visible Light Communication.
It can be thought of as a light-based Wi-Fi.
It uses light instead of radio waves to transmit
information.

3. LI-FI Construction
Lifi consists of 5 primary
sub-assemblies:
Printed circuit board
(PCB)
 RF power amplifier (PA)
Bulb
Optics
Enclosure

4. How LED transmits
If LED is on, you transmit a digital 1’s.
If LED is off, you transmit a 0’s.

5. Working of Li-Fi System

6. Advantages
High security
Easy to use
Fast data transfer
Reliable
Harmless
Low cost

7. Drawbacks
It requires line of sight.
Li-Fi doesn’t works in dark or outdoors.
Unlike Wi-Fi, we cannot move to other
rooms unless there are wired bulbs too.
It can be easily blocked.
No power, No internet.