A SUBMISSION OF MICRO PROJECT

Prepare Short Note on Li - Fi (Light- Fidelity)

BY
1. MEHETAR SHRAVANI ARJUN
2. WAGH SAURAV BHASKAR
3. JAGTAP ANITA ASHOK

DIPLOMA IN

ELECTRONICS AND TELECOMMUNICATIONS ENGINEERING

UNDER THE GUIDANCE OF

Mrs. D.A.Ghule

TO

DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION

ENGINEERING

CSMSS COLLEGE OF POLYTECHNIC, AURANGABAD

AND

MAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION

MSBTE, MUMBAI (M.S)

 CERTIFICATE
This is to certify that Following Students of Fifth semester of Diploma in
Electronics & Telecommunication Engineering of Institute CSMSS College of
Polytechnic (code:1152) have completed the Micro Project satisfactorily in subject Mobile
and Wireless Communication (22533)for the academic year 2022-2023 as prescribed in the
curriculum.

Place: Aurangabad
Date:

Sr. No. Enrollment No. Name Of Student

1 2011520219 MEHETAR SHRAVANI ARJUN

2 2011520226 WAGH SAURAV BHASKAR

3 2111520331 JAGTAP ANITA ASHOK

PROJECTGUIDE HEAD OF DEPARTMENT

Mrs. D.A.Ghule Mr. M.D.Narangale

PRINCIPAL

Dr. Ganesh .B. Dongre

 ACKNOWLEDGEMENT

We would like to express our thanks to the people who have helped us most
throughout our project. We would like to express our sincere thanks to the Principal of
CSMSS College of Polytechnic Dr. Ganesh .B. Dongre for being always with us as a
motivator. We are thankful to the H.O.D. of Electronics & Telecommunication
Engineering Department Mr. M.D. Narangale. for his kind support. We are grateful to our
Project Guide Mrs.D.A.Ghule for nonstop support and continuous motivation for the project.
Her help made us possible to complete our project with all accurate information. A special
thanks of our goes to our friends who helped us in completing the project, where they all
exchanged their own interesting ideas. We wish to thanks our parents for their personal
support or attention who inspired us to go our own way. Finally, we would like to thank God
who made all things possible for us till the end.

Sr. No. Name Of Student Sign

1 MEHETAR SHRAVANI ARJUN

2 WAGH SAURAV BHASKAR

3 JAGTAP ANITA ASHOK

 ••••••••••••••••••INDEX •••••••••••••••••••••••

1. Micro -Project Proposal .......................................................................... 1 -2

2. Rationale...................................................................................................... 3

3. Aims / Benefits of The Micro–Project......................................................... 3

4. Course Outcomes Achieved ......................................................................... 3

5. Literature Review ........................................................................................ 4

6. Actual Methodology Followed ................................................................ 5-7

7. Skill Developed / Learning Outcomes of Micro-Project............................... 8

8. Applications Of Micro – Project ................................................................. 8

 MICRO - PROJECT PROPOSAL

Prepare Short Note On Li-Fi (Light- Fidelity)

1.0 Aims / Benefits of the Micro Project

The purpose of Li -Fi technology is to provide a high-speed data communication using visible
light spectrum. Now LiFi is on-going of research, it has a potential advantage that can make a
supplement RF communication and can be used to improve wireless network performance

2.0 Course Outcomes Achieved

1. Troubleshoot mobile handset.
2. Assess cellular system capacity.
3. Assess performance of standards of different cellular mobile systems
4. Select relevant wireless technology suitable for various applications
5. Test the performance of various wireless protocols.

3.0 Proposed Methodology

1. Basic Information about Li-Fi.
2. Study of Li-Fi technology.
3. Study of Li-Fi VS Wi-Fi.

1
4.0 Action Plans

Planned Name of
Sr. Planned
Details of Activities Responsible Team
No. Start Date Finish Date
Member

1 Basic Information About Li-Fi 06/08/2022 11/08/2022 All

Study of Li-Fi technology

2 12/08/2022 18/08/2022 All

Study of Li-Fi vs Wi-Fi

3 21/08/2022 27/08/2022 All
technology

Study of Block diagram of Li-Fi

4 03/09/2022 12/09/2022 All

Study of circuit diagram of

5 13/09/2022 20/09/2022 All
Li-Fi
Study of working
5 23/09/2022 24/09/2022 All
principle of Li-Fi
Select Relevant Topic for
Micro- Project .
6 12/10/2022 18/10/2022 All

Make Project Report for Micro- All

7 01/10/2022 06/10/2022
Project.

Names of Team Member with Roll No.

Name of Student Roll No.
Mehetar Shravani Arjun 06
Wagh Saurav Bhaskar 07
Jagtap Anita Ashok 08

Mrs. D. A. Ghule

Department of Electronics &Telecommunication Engineering

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 MICRO-PROJECT REPORT

Prepare Short Note On Li-Fi (Light Fidelity)

1.0 Rationale
LiFi is high speed bidirectional networked and mobile communication of data using light.
LiFi comprises of multiple light bulbs that form a wireless network. When an electrical
current is applied to a LED light bulb a stream of light (photons) is emitted from the bulb.

2.0 Aims / Benefits of the Micro Project

The purpose of LiFi technology is to provide a high-speed data communication using visible
light spectrum. Now LiFi is on-going of research, it has a potential advantage that can make a
supplement RF communication and can be used to improve wireless network performance

3.0 Course Outcomes Achieved

1. Troubleshoot mobile handset.

2. Assess cellular system capacity.
3. Assess performance of standards of different cellular mobile systems
4. Select relevant wireless technology suitable for various applications
5. Test the performance of various wireless protocols.

3
4.0. Literature Review

4.1. Overview

Li-Fi is a light communication system that is capable of transmitting data at high speeds over
the visible light, ultraviolet, and infrared spectrums. In its present state, only LED lamps can be
used for the transmission of data in visible light. In terms of its end user, the technology is
similar to Wi-Fi — the key technical difference being that Wi-Fi uses radio frequency to induce
a voltage in an antenna to transmit data, whereas Li-Fi uses the modulation of light intensity to
transmit data. Li-Fi is able to function in areas otherwise susceptible to electromagnetic
interference (e.g. aircraft cabins, hospitals, or the military)

4.2. Block Diagram of an Li-Fi (Light Fidelity) :

Figure 1.1: Block Diagram of an Li-Fi (Light Fidelity)

Power supply produces constant power for lamp driver. Lamp driver connect to the internet connection.
Switch and LED lamp is connected lamp driver with fibre optics cables. LED lamp acts as a
communication source. Microchip, which is located in LED lamp, converts the data into light. High-speed
data is transmitted using light beam.

4
5.0. Actual Methodology Followed

5.1. Introduction to Li-Fi Technology

LiFi (light fidelity) is a bidirectional wireless system that transmits data via LED or infrared light.
It was first unveiled in 2011 and, unlike wifi, which uses radio frequency, LiFi technology only
needs a light source with a chip to transmit an internet signal through light waves.This is an
extraordinary advance over today's wireless networks. LiFi multiplies the speed and bandwidth of
wifi, 3G and 4G. The latter have a limited capacity and become saturated when the number of
users surfing increases, causing them to crash, reducing speeds and even interrupting the
connection.With LiFi, however, its band frequency of 200,000 GHz, versus the maximum 5 GHz
of the wifi, is 100 times faster and can transmit much more information per second. A 2017 study
by the University of Eindhoven obtained a download rate of 42.8 Gbit/s with infrared light with a
radius of 2.5 metres, when the best wifi would barely reach 300 Mbit/s.

5.2. Circuit Diagram of Li-Fi ( Light Fidelity)

Figure 5.2 : Circuit Diagram of Li-Fi Technology

5.3. Working of Li-Fi :

Light Fidelity technology is wireless communication device focused mainly on use of
visible light between violet (800 THz) and red (four hundred THz). Li-Fi is based solely
on propagation of information in defined and uniform fashion via amplitude modulation
of light supply. There is LED transmitter (light emitting) on one end and photo detector
(light sensor) on other. Li-Fi operates very simple and fast. The data input to LED
transmitter is encoded into light by varying the flickering rate at which binary code (1s
and 0s) is generated by LEDs flicker ‘on’ and ‘off’. LED transmitter’s on / off operation
which seems to be invisible to human eye as speed of LEDs is less than microsecond. By
switching ON LED is logical ‘1’ it makes data transfer according to incoming binary
codes, switching OFF is logical ‘0’. Data can be encoded in light by varying rate at which
LEDs flicker on and off to different combinations of 1s and 0s.
5
5.4. Flowchart of Li-Fi (Light Fidelity)

5.5. Difference between Li-Fi and Wi-Fi Technology

1. Wi-Fi(wireless fidelity) and Li-Fi(light fidelity) are two different technologies that are
used to send and receive data wirelessly.
2. In the case of Wi-Fi, we use Routers and Radio Frequency (RF) waves to transmit
data, whereas in Li-Fi we use LED bulbs and Light signals to transmit and receive
data.
3. Another big advantage of LiFi is that the usage of light allows LiFi connections to
occur almost instantaneously because light travels at extremely fast speeds. This
results in faster transmission of data and faster internet connections – about 100 times
faster than speeds achievable by WiFi.

6
 5.6. Applications of Li-Fi Technology

1. Security.
2. Dense urban environments.
3. Cellular communication.
4. EMI sensitive environments.
5. Augmented reality.
6. Localised advertising.
7. Underwater communication.
8. Safety environments.

5.7. Advantages of Li-Fi Technology

1. Revolutionary speed. Digital signals carried by light are way faster than those
transmitted via radio waves used in Wi-Fi connections.
2. Top-notch efficiency. LiFi uses a LED light bulb as a medium to transmit data to and
from a device.
3. Better security.
4. Enhanced availability.

5.8. Disadvantages of Li-Fi Technology

1. Limited Range. The fact that light can't penetrate through walls might be a good thing
when it comes to security but this also means that LiFi has a very limited range.
2. Limited Compatibility. Since LiFi is a new technology, not many devices are
compatible with it.
3. Not the answer to slow internet speeds.

7
 6.0 Skill Developed / Learning Outcomes of Micro-Project

1. Learn Basic Information About Li-Fi Technology.

2. Study of Li-Fi and Wi-Fi Technology.
3. Study of block diagram of Li-F Technology.

7.0 Applications of Micro-Project

1. Home Automation Using IoT.

2. IoT using Raspberry Pi.
3. Smart Irrigation System.
4. Swarm Robotics.
5. Smart Building Using IoT.
6. Mobile Robotics.
7. Smart Energy Meter Using GSM.
8. Home Automation System.

Mrs.D.A.Ghule

Department of Electronics & Telecommunication Engineering

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