DATA TRANSMISSION USING LIFI TECHNOLOGY

ECOFRIENDLY DATA TRANSMISSION IN

VISIBLELIGHT

COMMUNICATION

SUBMITTED BY

Abstract In recent years, there is a rapid development in the

solid state light-emitting diode (LED) materials which gave way for the next generation data communication known as visible light communication.

VLC has a promising future and it acts as a complement to the present RF communication by achieving larger bandwidth and high data rate.

Introduction At present, the day to day activities use lot of LED

based lights for illumination, which can also be used for communication because of the advantages like fast switching, high power efficiency and safe to human vision.

Hence, this project presents about ecofriendly data communication through visible light which consists of the white LEDs that transmit audio signals to the receiver.

The receiver circuit consists of solar panel connected with the amplifier and speakers to recover back the amplified version of original input signal.

Existing system In existing system, uses Rf based

communication ,so the inference and noise of the signal is high.

Power consumption of existing system is high compared to proposed system.

installation cost and environmental hazards are high compared to proposed system.

Proposed system The proposed system can be used in situations where a

household has many appliances with audio output such as TV, PC, Hi-fi radio and phone systems.

It consists of transmitter, free space channel and the receiver. In the receiver side, solar panel is used instead of using the photodiode receiver as they have the advantage of having a large surface area, which is used to target light easier.

As the efficiency of multicrystalline solar panel used in this work is 10%, the output voltage achieved from the solar panel is less. Still an eco friendly audio VLC is implemented without photodiode receiver and other power supplies.

Block diagram--TRANSMITTER

RECEIVER

Hardware requirement Microcontroller – PIC16F877A VLC module Solar panel Voice playback Speaker Battery LCD

PIC16F877A

Features High-Performance

RISC CPU Only 35 single-word

instructions to learn Operating speed-20

MHz USART module. PSP module. 40 pin standard

Package.

LCD DISPLAY 16 X 2

Features 5 x 8 dots with

cursor Built-in controller + 5V power supply 1/16 duty cycle B/L to be driven by

pin 1, pin 2 or pin 15, pin 16 or A.K (LED)

VLC MODULE It can transmit data 57600

baud rate serialy. Distance can be acheived

1 Feet to 10 Feet for wireless open optical communication.

 High intensity LED matrix.

High quality PCB FR4 Grade with FPT Certified.

VOICE PLAYBACK Power input: DC 2.4-

5.5V With internal audio

amplifier, this board can drive 8 Ohm 0.5W speaker directly.

Microphone is on board Board dimension: 54mm

x 38mm

Software requirement MPLAB Embedded C Proteus

Thank you