Introduction of Visible Light Communication (VLC) Final Year Project,Using Photodiodes and Leds also Arduino UNO R3 For microcontroller purpose to operate the codes

2. SARHAD UNIVERSITY OF SCIENCE & INFORMATION
TECHNOLOGY, PESHAWAR.
DEPARTMENT OF ELECTRICAL ENGINEERING
Final Year Project Presentation
(BE Electrical Engineering)
Design and Implementation of Visible Light Communication
M.Zubair Khattak Reg: No. SU/12-01-071-082
Noor ud Din Reg: No. SU/12-01-071-093
M.Shamim Afridi Reg: No. SU/12-01-071-075

3. INTRODUCTION:
 Visible light communication (VLC) is a data communications
medium which uses visible light between 400 to 800 THz and
780–375 nm.
 In these systems, light-emitting diodes blink at a rapid rate such
that the human eye will not notice the change in light intensity,
but a sensitive photodiode can detect the on-off behavior and
decode the information embedded within it.
 Information will be converted into bits through some coding
scheme by a microcontroller and will be transmitted with
blinking LEDs. Photodiodes on the receiving side will detect the
fluctuation of the LEDs from the transmitter and will send
signals to a microcontroller which is integrated with a computer
to determine the originally transmitted message.

4. PROBLEM STATEMENT:
 If the intensity of ambient light is greater than that of the light
from our system, the signal-to-noise ratio (SNR) is low, which
will distort transmitted data.
 To compensate for this, the SNR will be maximized by setting
thresholds on the microcontroller based on voltage signals
produced by the ambient light in conjunction with the
transmitter signal.
 The system will only be maximized when the LEDs are directly
facing the sensor. If the angle is changed even slightly, the
maximum range of the system will decrease significantly.
 It is ensure that the transmitter and receiver are facing directly
at each other

5. OBJECTIVES:
 To establish the communication between two system by using
visible light communication.
 Can accommodate bandwidth requirements of growing number
of users
 Secure communication( i-e Indoor System)
 Lower power consumption than RF based devices

6. METHODOLOGY:
 Some LEDs and a controller that can code the data into those
LEDs.
 Usage of rapid pulses of light to transmit information
wirelessly.
 At Binery Digital 1,shows that LEDs is ON,the Data will be
transmit.
 At Binery Digital 0,shows that LEDs is OFF,the Data will not be
transmit.
 It will be switched on and off very quickly, which gives nice
opportunities for transmitting data.

7. Data Modulator
Micro-
Controller
LEDs
Photo-
Detector
Micro-
Controller
De-
Modulator
Original
form of Data
Block Diagram:

8. APPLICATIONS:
 SMART LIGHTING
 DEFENCE & SECURITY
 HOSPITALS & HEALTHCARE
 HAZARDOUS ENVIRONMENTS

9. GANTT CHART:
Work/Schedule Plan
Month
1-2
Month 3-4
Month
5-6
Month
7-8
Month
9-10
Month 11-12
Literature Survey
Experimental work
Sample Testing
Observation and calculation of
Results
Thesis writing

10. REFERENCES:
 H. Elgala, R. Mesleh, and H. Haas, “Indoor optical wireless
communication: Potential and state-of-the-art,” IEEE
Communications Magazine, Optical Communications Series,
vol. 49, no. 9, pp. 56–62, September 2011
 802.15.7, “IEEE standard for local and metropolitan area
networks. Part 15.7: Short-Range Wireless Optical
Communication using Visible Light,” September 2011.
 H. Elgala, R. Mesleh, and H. Haas, “Indoor optical wireless
communication: Potential and state-of-the-art,” IEEE
Communications Magazine, Optical Communications Series,
vol. 49, no. 9, pp. 56–62, September 2011.
 “Indoor broadcasting via white LEDs and OFDM,” Consumer
Electronics, IEEE Transactions on, vol. 55, no. 3, pp. 1127 –
1134, august 2009.

11. Thank you!