Indoor Wireless Communication using Visible Light (LI FI) Project

This document presents a competency demonstration report detailing a project on indoor wireless communication using Visible Light (LI-FI) technology. The project, conducted at the University of Mumbai, aimed to create a wireless system for indoor appliances with higher speed, optimum security, and higher bandwidth. The student's role was as a team leader, responsible for assigning tasks, developing code using MATLAB, designing the transmitting section (including power supply, regulator, and microcontroller), and overseeing PCB design and soldering. The report highlights the advantages of LI-FI over Wi-Fi, the application of engineering knowledge, accomplishments, identified issues (such as power supply restrictions and team management), and solutions implemented (like using transformers and rectifiers, and leadership techniques). The project involved collaborative work and aimed to provide a solution for wirelessly operating indoor apparatus, eliminating the need for cabling. The student contributed to PCB designing, testing, soldering, scheduling, and managing team roles, ensuring the project's quality and functionality.

COMPETENCY
DEMONSTRATION REPORT
Career Episode 3
KATUDIA VEENAY KISHOR MEENA

CE 3.1 Project Information
Name of the project: Indoor Wireless Communication using Visible Light (LI FI)
Location of the project: Mumbai
Project Duration: [2013 - 2014]
Organization: University of Mumbai
Role and Designation during the time: Team Leader
CE 3.2 Project Background
CE 3.2.1 Characteristics of the project
Wireless technology are the most trending sector in the current digital world and every
individual wants to utilize operations wirelessly. I had developed a project that will be helpful in
eliminating the wired connection between the indoor appliances and automate the actions
through utilizing the Li-Fi technology. I had used this technology as an alternative of the wired
communication between the indoor electrical appliances that will be using LED’s for the
communication for executing the operations. I had chosen the Li-Fi technology over the Wi-Fi in
manner to allow the components and apparatus for dealing with the ever-changing conditions.
CE 3.2.2 Objectives developed for the project
I was interested in this project and wanted to accomplish the overall activities of the
project in an effective and efficient manner for which, I had developed the following objectives:

 To provide a wireless communication system for the indoor appliances at higher
speed
 To Keep the security at optimum level
 To provide higher bandwidth
CE 3.2.3 My area of work
My primary job was to assign roles and responsibilities to each involved members in this
project in manner to accomplish the activities involved in this project. I had used the codes and
Matlab for the development of this system that will allow users to login in the network and
operate the appliances wirelessly. I had used several algorithms for the efficient and effective
development of this project. Thereafter I had solely designed the transmitting section for the
established network. Transmitting section includes the power supply that will be responsible for
providing power to the whole setup and used then following components for it:
Figure 1: Power Supply, Component Diagram, and Layout
Following is the layout of the circuit diagram:

Figure 2: Circuit Diagram
I used transformer, rectifier, and filter in manner to restrict the high voltage supply and
manage the flow of the power that can be handled by the components without being destroyed. I
had also used the ‘Regulator and Microcontroller’ for the collection of the transmitted data and
process it accordingly for performing the actions. I also utilized the USN to TTL converter for
the establishment of this wireless network. Thereafter, I had also used the LED for this
transmission section.

CE 3.2.4 Project Group
CE 3.2.5 My responsibilities throughout the project
I was responsible for auditing the overall development of the project executed by the
individuals of the project. I had also contributed in the MATLAB coding that has played a major
role in the execution of the project successfully. I had also contributed in the testing of the
established product in manner to detect if there is any fault with the programming or circuit
instalment. I was also responsible for the PCB designing in the project and soldering each
component at the board. I had kept the soldering very clear and for the evaluation process,
developed the following test cases:
Delay Speed of Transmitter Reception Error
1 msec More Yes No

0.01 msec Less Yes No
0.001 msec Very Less No Yes
CE 3.3 Distinctive Activity
CE 3.3.1 Comprehending the theory of the project
I had considered the advantages of the Light Fidelity (Li Fi) over other wireless
technology and utilized for the development of the project as it is based on VLC technology that
is helpful in fast exchange of data. “The main components of this communication system are 1) a
high brightness white LED, Which acts as a communication source and 2) a silicon photodiode
which shows good response to visible wavelength region serving as the receiving element? LED
can be switched on and off to generate digital strings of 1s and 0s.”
CE 3.3.2 Engineering knowledge and skills applied in the project
The whole setup of the project needs highly qualification skills in the electronics
engineering as it needs perfect programming and establishment of the electronic components in
an effective manner. I applied my knowledge gathered during my electronics engineering
academics and delivered the objectives and goals of the project. It was necessary to embed
proper programming for the exchange of the information between the transmission and receiving
section.

CE 3.3.3 Accomplishment and task performed
I had firstly assigned the jobs to the team members according to their interest as everyone
was already well aware with the project that we were about to deliver. I had done the
management and PCB designing within the project along with the auditing and monitoring of the
development of the project. The project was subdivided for each involved member and I had to
take care of the development of the project. I had used various algorithms and coding for the
establishment of this wireless network in which a user can login and operate the appliances
wirelessly. This project is an alternative solution for operating the appliances using cables. I had
to accomplish the activities in the transmission and receiving section through proper
establishment of the electrical components on the circuit board.
CE 3.3.4 Identified issues and their solutions
3.3.4.1 Issues
I had identified that power supply needs to be restricted at the very low level as the
general power supply being used in India is 220 V. I had used the electrical components of very
low rating those will be destroyed or burnt if high voltage is passed through them. Managing the
team as a whole was another concerning topic for me as this was the first time when I was
leading a team for real job.
3.3.4.2 Solutions
I had used the Transformer, Rectifier, and Regulator for the conversion of A.C voltage
supply to D.C voltage supply and managed the linear power supply for the electrical appliances.
This will be helpful in protecting them from getting damage due to high voltage. I had used my
leadership techniques for communicating with each team members and tried to motivate them
towards accomplishing the objectives of the project.

CE 3.3.5 Plan to produce creative and innovative work
Wired indoor appliances are being utilized since the development of the electricity and
wireless technology is what, current population wants to be relied upon. I had contributed in
developing the project that will be helpful in operating these appliances using Li – Fi technology
that is based upon VLC technology that is much faster and more reliable than any other wireless
technology. I contributed in this project to operate the house hold activities through LED
transmission through proper and accurate programming installed with the microcontroller.
CE 3.3.6 Collaborative work
This was a vast project and at that time, it was complete to impossible for me to execute
the project. My team members and I had contributed in the successful development of this
project that will allow the user to be connected within the network and utilize the indoor
appliances wirelessly. Every team member was responsible for the successful delivery of this
project to be operated wirelessly. I lead the team towards accomplishing the constraints of the
project within the schedule as planned in the very early stage of the execution of the project. I
had tried to keep the development of the project on track through motivating and supporting each
team member towards delivering the project in an effective and efficient manner.
CE 3.4 Project Review
CE 3.4.1 Project Overview
I had used the ‘coding’ and ‘decoding’ within the microcontroller for the
execution of the exchange of data between the transmitter and receiver and thus, execute the
required operation. Our attempt was to boost up the speed of the signal transmission between the

transmitter and receiver. I had used white LED in combination with the OFDM transmission that
has resulted in positive manner for enhancing the switching of the transmitter and receiver. This
project was an attempt to present a solution for accessing the indoor apparatus wirelessly and
eliminate the need of cabling.
CE 3.4.2 My contribution to work
I had contributed in the PCB designing, Testing, and soldering of the electronic and
electrical components of this project. I had done soldering on the electric boards as shown in the
following figures:
Figure 4: Transmission Board
Figure 5: Receiving Section

Figure 6: The Whole Project
I had contributed in scheduling the project and evaluating the functionality of the project
in manner to keep the quality of the project at the highest level. I had contributed in managing
the roles of each individual and provided needful guidance to them to accomplish their area of
work in an effective and efficient manner. I had to take care of the conflicts and executed the
whole project without any conflict between the team members.