International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 02 | Feb -2017
p-ISSN: 2395-0072
www.irjet.net
Li-Fi Technology Transmission of Data Through Visible Light Communication 1Divyani
Kamble, Gaurav Gajbhiye, Shubham Bhake, Sanjana Jasutkar, Pratiksha Chaudhari. of Electronics and Communication Engineering.Dr. Babasaheb Ambedkar College ofEngineering and Research.Nagpur, Maharastra, India.
1Students,Department
---------------------------------------------------------------------***--------------------------------------------------------------------3. SYSTEM ARCHITECTURE Abstract - Simply, Li-Fi is nothing but Wi-Fi using light. By using light data can transmit. German physic DR. HARALD HASS was invented Light Fidelity (Li-FI) Technology. This is very much latest technology in which light emitting diode can transmit data much faster and flexible as compare to WiFi technology. Here we develop the application module of LiFi technology. In which data can transmit through LED and receive by using photo diode. Key Words: Li-Fi, WI-Fi, LED, ATMEGA16.
1.INTRODUCTION The aim of this project is to make system for data transfer in indoor unit. For wireless communication we use radio and microwave which is done by electromagnetic spectrum. The radio waves are limited in range. When number of users is more RF spectrum is over loaded due to which electromagnetic spectrum is affected. Hence reduction occurs in efficiency of system. German physic 'Harald Hass'has define the data can transmit by illumination. Data can be send by using fiber optic through an LED light bulb with varies intensity which is faster than human eye follow. If LED bulb is in ON state, it transmit the digital 1 and if in OFF state transmit digital 0.It can proceed very fastly as light will ON and OFF quickly. Data will be encode in light by varying the rate of flickering period ON and OFF of LED light. It gives different string of 1's and 0's.The medium use for transmitting data is visible light spectrum through LED. I-Fi is very faster, secure and cheaper in cost as compare to Wi-Fi or any other wireless transmission.
Our system is divided in two sections transmitter section and receiver section as shown in block diagram. A .Transmitter Section The measure data of sensors are store in ATMEGA16.This data is been transfer using LED panel by light waves. When LED is ON microchip convert digital data in form of light. The operational procedure is simple. If the LED is on, we transmit a digital 1 and if it is off transmit a 0. The LED can be switched on and off very quickly, which gives nice opportunities for transmitting data. B. Receiver Section Receiver section consists of photo detector, which detects the light. Then this light is amplified and fed to the device driver. Using this device driver we drive the receive data to the ATMEGA16, which stores this data and display on LCD Display in receiver section. TRANSMITTER END POWER CLOCK RESET
ATMEGA16
DRIVER STAGE
LED PANEL
PHOTO DETECTOR
2. LITERATURE SURVEY In Wi-Fi technology user depends upon the source like routers but in case of Li-Fi it is not. The Li-Fi technology uses light as a source for data transfer while Wi-Fi uses a radio signal which is unable to use underwater for data transmission. We know light can pass through water, hence Li-Fi is helpful for underwater data transmission. In Wi-Fi technology data can easily hacked because of radio waves can penetrate through the walls but in case of Li-Fi data are more secured as light cannot penetrate through the walls.
DRIVER STAGE
Power Clock Reset
ATMEGA16
RECEIVER END Fig1.Block Diagram
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