Li fi ppt by Marshall hakkim sit mangalore
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The document discusses Li-Fi or visible light communication (VLC) as an alternative to Wi-Fi. It notes that radio frequency spectrum is limited and issues like availability, efficiency and security exist with current wireless communication systems. Li-Fi uses visible light spectrum for data transmission by turning LED light bulbs into communication devices. It has advantages like large available spectrum, high efficiency, availability everywhere including underwater, and improved security since light does not penetrate walls. However, it requires line of sight between transmitter and receiver and light cannot match the range and penetration of radio waves. Potential applications of Li-Fi discussed include use in airlines, traffic lights, medical areas, smart museums, and power plants.
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Li fi seminar ppt
This document discusses Li-Fi technology, which uses visible light communication (VLC) to transmit data through LED light bulbs. It begins by describing issues with Wi-Fi technology like limited radio spectrum capacity and security. Li-Fi was introduced in 2011 as a way to transmit data through light at very high speeds. It works by varying the intensity of LED bulbs faster than the human eye can detect. Compared to Wi-Fi, Li-Fi has advantages like vastly increased available spectrum, higher efficiency, better security since light cannot penetrate walls, and lower costs. Potential applications include use in traffic signals, intrinsically safe environments, and onboard airplanes.
Wireless Energy Harvesting to Charge Cell phone Batteries
he research deals with the charging of cellphones
wirelessly using various techniques. A voltage doubler circuit
assembled with a “more” efficient circuit definitely makes
this project a brighter innovation.
Presentation1
The document presents a seminar on Li-Fi technology given by Ved Prakash Prajapat. It discusses what Li-Fi is, how it works using LED lights for data transmission, its advantages over Wi-Fi such as higher speeds, more bandwidth and security. Applications discussed include smart lighting, vehicular networks, underwater communications and use in places where radio signals are restricted such as hospitals and aircraft. The seminar concludes that Li-Fi can help overcome limitations of the radio spectrum and allow for a cleaner, safer and more energy efficient wireless future.
Architecture of an efficient dual band 1.8/2.5 GHz rectenna for RF energy har...
This paper presents a highly efficient rectenna of RF energy harvesting systems operating at
1.8 GHz and 2.5 GHz bands for battery-less sensor application. The antenna is design by CST-MWS.
The Schottky diode used for rectifying circuit is HSMS 286B in which designed by Agilent ADS. The key
finding of the paper is that the simulated DC output voltage of the rectenna is 1.35 V for low input power of
-25 dBm at a high resistance load of 1M Ω. Correspondingly, the RF-DC conversion efficiency of
the rectification process is 59.51% and 45.75% at 1.8 GHz and 2.5 GHz, which are high efficiency and much
better compared to literature respectively. The rectenna is capable to produce 1.8 V from an input power of
-20 dBm. Thus, the proposed RF energy harvesting system offers a promising solution designed for efficient
functionality at a low power level of RF energy in the dual band.
Li fi
Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It can provide higher speeds than Wi-Fi and has several advantages over radio-based wireless including increased security, no interference with other devices, and support for multiple users simultaneously. Li-Fi works by varying the intensity of LED light fast enough for the human eye not to detect flickering, and this signal can be received by a photodetector. It has potential applications in areas where radio signals are not desired or possible.
li fi report
Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It can provide higher speeds than Wi-Fi and does not interfere with other wireless networks. Li-Fi uses visible light communication and infrared light to transmit data and requires line-of-sight between transmitters and receivers. Researchers have achieved data rates over 500 megabytes per second in the lab using Li-Fi technology.
DESIGN & ANALYSIS OF RF ENERGY HARVESTING SYSTEM FOR CHARGING LOW POWER DEVICES
Finite electrical battery life is encouraging the companies and researchers to come up with new ideas and technologies to drive wireless mobile devices for an infinite or enhance period of time. Common resource constrained wireless devices when they run out of battery they should be recharged. For that purpose main supply & charger are needed to charge drained mobile phone batteries or any portable devices. Practically it is not possible to carry charger wherever we go and also to expect availability of power supply everywhere. To avoid such disadvantages some sort of solution should be given and that can be wireless charging of mobile phones.[4] If the mobile can receive RF power signals from the mobile towers, why can’t we extract the power from the received signals? This can be done by the method or technology called RF energy harvesting. RF energy harvesting holds a promise able future for generating a small amount of electrical power to drive partial circuits in wirelessly communicating electronics devices. RF power harvesting is one of the diverse fields where still research continues. The energy of RF waves used by devices can be harvested and used to operate in more effective and efficient way.
DATA TRANSMISSION USING LIFI TECHNOLOGY
The document describes a proposed eco-friendly visible light communication (VLC) system that uses white LED lights to transmit audio signals. In the proposed system, a microcontroller and VLC module in the transmitter encode audio and modulate the white LEDs. At the receiver, a solar panel harvests light from the LEDs and provides power to an amplifier and speaker to recover and playback the original audio signal without other power supplies. The system offers advantages over existing RF-based systems like lower interference, power consumption, and installation costs while being more environmentally friendly.
Recommended
Li fi seminar ppt
This document discusses Li-Fi technology, which uses visible light communication (VLC) to transmit data through LED light bulbs. It begins by describing issues with Wi-Fi technology like limited radio spectrum capacity and security. Li-Fi was introduced in 2011 as a way to transmit data through light at very high speeds. It works by varying the intensity of LED bulbs faster than the human eye can detect. Compared to Wi-Fi, Li-Fi has advantages like vastly increased available spectrum, higher efficiency, better security since light cannot penetrate walls, and lower costs. Potential applications include use in traffic signals, intrinsically safe environments, and onboard airplanes.
Wireless Energy Harvesting to Charge Cell phone Batteries
he research deals with the charging of cellphones
wirelessly using various techniques. A voltage doubler circuit
assembled with a “more” efficient circuit definitely makes
this project a brighter innovation.
Presentation1
The document presents a seminar on Li-Fi technology given by Ved Prakash Prajapat. It discusses what Li-Fi is, how it works using LED lights for data transmission, its advantages over Wi-Fi such as higher speeds, more bandwidth and security. Applications discussed include smart lighting, vehicular networks, underwater communications and use in places where radio signals are restricted such as hospitals and aircraft. The seminar concludes that Li-Fi can help overcome limitations of the radio spectrum and allow for a cleaner, safer and more energy efficient wireless future.
Architecture of an efficient dual band 1.8/2.5 GHz rectenna for RF energy har...
This paper presents a highly efficient rectenna of RF energy harvesting systems operating at
1.8 GHz and 2.5 GHz bands for battery-less sensor application. The antenna is design by CST-MWS.
The Schottky diode used for rectifying circuit is HSMS 286B in which designed by Agilent ADS. The key
finding of the paper is that the simulated DC output voltage of the rectenna is 1.35 V for low input power of
-25 dBm at a high resistance load of 1M Ω. Correspondingly, the RF-DC conversion efficiency of
the rectification process is 59.51% and 45.75% at 1.8 GHz and 2.5 GHz, which are high efficiency and much
better compared to literature respectively. The rectenna is capable to produce 1.8 V from an input power of
-20 dBm. Thus, the proposed RF energy harvesting system offers a promising solution designed for efficient
functionality at a low power level of RF energy in the dual band.
Li fi
Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It can provide higher speeds than Wi-Fi and has several advantages over radio-based wireless including increased security, no interference with other devices, and support for multiple users simultaneously. Li-Fi works by varying the intensity of LED light fast enough for the human eye not to detect flickering, and this signal can be received by a photodetector. It has potential applications in areas where radio signals are not desired or possible.
li fi report
Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It can provide higher speeds than Wi-Fi and does not interfere with other wireless networks. Li-Fi uses visible light communication and infrared light to transmit data and requires line-of-sight between transmitters and receivers. Researchers have achieved data rates over 500 megabytes per second in the lab using Li-Fi technology.
DESIGN & ANALYSIS OF RF ENERGY HARVESTING SYSTEM FOR CHARGING LOW POWER DEVICES
Finite electrical battery life is encouraging the companies and researchers to come up with new ideas and technologies to drive wireless mobile devices for an infinite or enhance period of time. Common resource constrained wireless devices when they run out of battery they should be recharged. For that purpose main supply & charger are needed to charge drained mobile phone batteries or any portable devices. Practically it is not possible to carry charger wherever we go and also to expect availability of power supply everywhere. To avoid such disadvantages some sort of solution should be given and that can be wireless charging of mobile phones.[4] If the mobile can receive RF power signals from the mobile towers, why can’t we extract the power from the received signals? This can be done by the method or technology called RF energy harvesting. RF energy harvesting holds a promise able future for generating a small amount of electrical power to drive partial circuits in wirelessly communicating electronics devices. RF power harvesting is one of the diverse fields where still research continues. The energy of RF waves used by devices can be harvested and used to operate in more effective and efficient way.
DATA TRANSMISSION USING LIFI TECHNOLOGY
The document describes a proposed eco-friendly visible light communication (VLC) system that uses white LED lights to transmit audio signals. In the proposed system, a microcontroller and VLC module in the transmitter encode audio and modulate the white LEDs. At the receiver, a solar panel harvests light from the LEDs and provides power to an amplifier and speaker to recover and playback the original audio signal without other power supplies. The system offers advantages over existing RF-based systems like lower interference, power consumption, and installation costs while being more environmentally friendly.
Фестиваль "Остров детства" 24-26 апреля, 2015 Экспоцентр Гарден Сити, СПб
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The document summarizes the activities on Day 1 of the EXCITE program. In the morning session, students learned about webpages and how they are displayed in web browsers using HTML or other markup languages. The afternoon session introduced blogs as informational websites published on the World Wide Web that consist of posts displayed in reverse chronological order, though traditionally blogs were written by individuals or small groups on a single subject.
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Li fi
LI-FI is transmission of data through illumination ,i.e. sending data through a LED light bulb that varies in intensity faster than human eye can follow
Li fi
Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It was invented by German physicist Harald Haas in 2011. Li-Fi provides higher speed and more secure data transmission than Wi-Fi as it does not penetrate walls and uses visible light spectrum which is in abundance. It has applications in traffic lights, airlines, petrochemical plants and underwater where radio waves cannot be used. While Li-Fi has advantages of high speed, security and availability, it also faces challenges of line of sight requirement and interference from other light sources.
LIFI TECHNOLOGY
INTRODUCTION
HISTORY
PRESENT SCENARIO
ISSUES REGARDING RADIO SPECTRUM
VISIBLE LIGHT SPECTRUM
HOW LIFI WORKS
CONSTRUCTION OF LIFI
COMPARISON OF LIFI WITH WIFI
APPLICATIONS
LIMITATIONS
CONCLUSION
REFERENCES
LIFI-UPI
Li-Fi is a fast, cheap, and bidirectional optical wireless technology that uses light-emitting diodes (LEDs) for data transmission. It is based on visible light communication between 400-800 THz and provides a wireless alternative to Wi-Fi by using light instead of radio waves. Li-Fi has several advantages over Wi-Fi such as having a higher speed of over 10 Gbps, being more secure due to the inability of light to pass through walls, and having a larger and less regulated bandwidth than radio waves. Potential applications of Li-Fi include use in traffic lights, airplanes, hospitals and as a means of underwater communication.
Lifi(light fidelity)
LIFI (Light Fidelity) is a new technology that uses visible light communication for wireless transmission of data using LED light bulbs. It was introduced by Professor Harald Haas at the University of Edinburgh. LIFI provides illumination as well as high-speed wireless communication and has advantages over WiFi such as higher speed, more secure transmission, lower cost, and an unregulated and vast light spectrum. However, it also faces challenges of light not penetrating solid objects and interference from other light sources. Potential applications of LIFI include use in airplanes, traffic lights, street lamps, and industries where radio transmissions are restricted.
Li fi technology
The document discusses Li-Fi technology, which uses visible light communication to transmit data wirelessly. It provides an introduction to Li-Fi and its history, explaining how it works by transmitting data through LED light bulbs at speeds faster than the human eye can detect. The document compares Li-Fi to Wi-Fi, outlines Li-Fi's advantages like higher speeds and better security, and discusses applications for Li-Fi including use in places where radio frequencies are restricted. It also notes some limitations of Li-Fi, such as the need for line of sight transmission and inability to pass through solid objects.
Presentation1
Li-Fi is a new technology that uses visible light communication and LED bulbs to transmit wireless data using light instead of radio waves. It provides higher speeds, increased capacity, more security, and is more energy efficient than traditional Wi-Fi. Li-Fi could overcome issues with radio waves like limited spectrum capacity and help create a more sustainable wireless future by taking advantage of light that already exists in every environment.
Li fi(led transmission of data) presentation
LIFI –”LIGHT FIDEALITY” is transmission of data through illumination, i.e. sending data through a LED light bulb that varies in intensity faster than human eye can follow. Li-Fi is a light based Wi-Fi it uses light instead of radio waves to transmit information.
HISTORY - The technology truly began during the year 1990’s in countries like Germany , Korea and Japan where they discovered LED’s could be retrofitted to send information . Prof. Harald Hass from university of Edinburgh. continues to wow the world with the potential to use light for communication He demonstrated in year 2012.
5. IMPLEMENTATION OF LI-FI The LI-FI product consists of three primary sub assemblies A. Emitter B. RF Driver C. Power Supply
6. FUNCTION OF BULB ASSEMBLY - At the heart of LI-FI is the bulb sub assembly where a sealed bulb is embedded in a dielectric material The dielectric material serves two purposes A. Wave guide B. Electric field
7. RF DRIVER - Power amplifier (PA) assembly that uses an LDMOS device. Converts electrical energy into RF power. The PA is designed to ruggedness and efficiency. The RF driver also contains controls circuit for digital and analog lighting controls.
8. HOW LI-FI WORKS- Operational procedure is very simple, if the LED is on, you transmit a digit 1, if its off you transmit a digit 0. the LED’s can be switched on and off quickly, which gives nice opportunities for transmitting data. hence all that us required is some LEDS and a controller that code data into those LEDs. We have to just vary the rate at which the LEDs flicker depending upon the data we want to encode. Thus every light source will work as a hub for data transmission. IMPLEMENTATION OF LI-FI The LI-FI product consists of three primary sub assemblies A. Emitter B. RF Driver C. Power Supply
6. FUNCTION OF BULB ASSEMBLY - At the heart of LI-FI is the bulb sub assembly where a sealed bulb is embedded in a dielectric material The dielectric material serves two purposes A. Wave guide B. Electric field
7. RF DRIVER - Power amplifier (PA) assembly that uses an LDMOS device. Converts electrical energy into RF power. The PA is designed to ruggedness and efficiency. The RF driver also contains controls circuit for digital and analog lighting controls.
8. HOW LI-FI WORKS- Operational procedure is very simple, if the LED is on, you transmit a digit 1, if its off you transmit a digit 0. the LED’s can be switched on and off quickly, which gives nice opportunities for transmitting data. hence all that us required is some LEDS and a controller that code data into those LEDs. We have to just vary the rate at which the LEDs flicker depending upon the data we want to encode. Thus every light source will work as a hub for data transmission
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Фестиваль "Остров детства" 24-26 апреля, 2015 Экспоцентр Гарден Сити, СПб
Isle of Childhood - special event for parents and children in St.Petersburg.
Остров детства - фестиваль для родителей и детей в Сантк-Петербурге.
Путешествия с детьми, детский активный отдых, спорт, досуг, творчество, детские лагеря, частные детские сады и школы, медицина для детей.
My presentation
The document summarizes the activities on Day 1 of the EXCITE program. In the morning session, students learned about webpages and how they are displayed in web browsers using HTML or other markup languages. The afternoon session introduced blogs as informational websites published on the World Wide Web that consist of posts displayed in reverse chronological order, though traditionally blogs were written by individuals or small groups on a single subject.
Contraceptive_Stockouts_Lit_review
This document provides an overview of the methods used to conduct a literature review on contraceptive stockouts. Published literature was identified through searches of PubMed, JSTOR and Google Scholar. Grey literature was identified through Google searches and reviews of organizational websites. The purpose of the review was to summarize existing data on the impact of contraceptive stockouts and inform research and advocacy efforts. Key findings of the literature review are summarized in the executive summary.
Lessons learnt 3
1. The document discusses providing social enterprises with branding and marketing services to help them become more sustainable through increased visibility.
2. It notes that college students and recent graduates can help reduce operational costs by 20% by providing services.
3. Key needs for social enterprises are identified such as marketing, training, quality assurance, and partnerships with other organizations to help attract investors.
Hobby Lobby
This document outlines the table of contents for a report about Hobby Lobby, including sections on the company's background and founding in 1972, mission statement focusing on commitment to God, expectations for employees, social issues and projects, and a conclusion. The company was started small in Oklahoma City by David and Barbara Green and believes God has allowed it to endure and prosper.
How sem will fit in your marketing strategy
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Advising Special Populations/Closing the Gap with CAP
This document provides an overview of advising special populations at Florida International University. It discusses advising exploratory students, the Graduation Success Initiative to help students find their academic home, and campus partners that provide additional support services. The document emphasizes the importance of getting parents involved, addressing financial concerns, and making supportive connections with students to help them successfully transition to and complete college. It concludes that appropriately matching students to institutions and providing a "warm hand-off" are most important to ensuring their continued progress.
PIHukum
Dokumen tersebut membahas tentang hukum waris di Indonesia. Hukum waris mengatur pemindahan hak milik warisan dan menentukan siapa saja ahli waris dan bagian warisan masing-masing. Dokumen juga menjelaskan unsur-unsur hukum waris seperti pewaris, harta warisan, dan ahli waris beserta hal-hal yang dapat membatalkan status seseorang sebagai ahli waris.
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Este documento define y clasifica los diferentes tipos de pronombres en español. Explica que los pronombres sustituyen a nombres o sintagmas nominales. Distingue entre pronombres cuyas clases coinciden con los determinantes, como demostrativos, posesivos, numerales y otros, y pronombres con clases únicas como personales y relativos. Brevemente describe las características fundamentales de cada clase de pronombre.
Final Thesis Florian Debève 2014
This master's thesis examines the normative influence of NGOs on the relationship between international regimes governing intellectual property and climate change. It argues that the distribution of norms advocated by NGOs can explain changes within regime complexes. Specifically, it hypothesizes that the more powerful NGOs are in advocating certain norms, the more likely states are to establish institutions reflecting those norms. The thesis tests this hypothesis by analyzing the power of NGOs addressing the role of intellectual property in climate change technology transfer and finding they have relatively weak power, which may explain the lack of linkage between the two regimes. If supported, the study suggests norms, rather than power or history, are important drivers of change within regime complexes.
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Similar to Li fi ppt by Marshall hakkim sit mangalore
Li fi
LI-FI is transmission of data through illumination ,i.e. sending data through a LED light bulb that varies in intensity faster than human eye can follow
Li fi
Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It was invented by German physicist Harald Haas in 2011. Li-Fi provides higher speed and more secure data transmission than Wi-Fi as it does not penetrate walls and uses visible light spectrum which is in abundance. It has applications in traffic lights, airlines, petrochemical plants and underwater where radio waves cannot be used. While Li-Fi has advantages of high speed, security and availability, it also faces challenges of line of sight requirement and interference from other light sources.
LIFI TECHNOLOGY
INTRODUCTION
HISTORY
PRESENT SCENARIO
ISSUES REGARDING RADIO SPECTRUM
VISIBLE LIGHT SPECTRUM
HOW LIFI WORKS
CONSTRUCTION OF LIFI
COMPARISON OF LIFI WITH WIFI
APPLICATIONS
LIMITATIONS
CONCLUSION
REFERENCES
LIFI-UPI
Li-Fi is a fast, cheap, and bidirectional optical wireless technology that uses light-emitting diodes (LEDs) for data transmission. It is based on visible light communication between 400-800 THz and provides a wireless alternative to Wi-Fi by using light instead of radio waves. Li-Fi has several advantages over Wi-Fi such as having a higher speed of over 10 Gbps, being more secure due to the inability of light to pass through walls, and having a larger and less regulated bandwidth than radio waves. Potential applications of Li-Fi include use in traffic lights, airplanes, hospitals and as a means of underwater communication.
Lifi(light fidelity)
LIFI (Light Fidelity) is a new technology that uses visible light communication for wireless transmission of data using LED light bulbs. It was introduced by Professor Harald Haas at the University of Edinburgh. LIFI provides illumination as well as high-speed wireless communication and has advantages over WiFi such as higher speed, more secure transmission, lower cost, and an unregulated and vast light spectrum. However, it also faces challenges of light not penetrating solid objects and interference from other light sources. Potential applications of LIFI include use in airplanes, traffic lights, street lamps, and industries where radio transmissions are restricted.
Li fi technology
The document discusses Li-Fi technology, which uses visible light communication to transmit data wirelessly. It provides an introduction to Li-Fi and its history, explaining how it works by transmitting data through LED light bulbs at speeds faster than the human eye can detect. The document compares Li-Fi to Wi-Fi, outlines Li-Fi's advantages like higher speeds and better security, and discusses applications for Li-Fi including use in places where radio frequencies are restricted. It also notes some limitations of Li-Fi, such as the need for line of sight transmission and inability to pass through solid objects.
Presentation1
Li-Fi is a new technology that uses visible light communication and LED bulbs to transmit wireless data using light instead of radio waves. It provides higher speeds, increased capacity, more security, and is more energy efficient than traditional Wi-Fi. Li-Fi could overcome issues with radio waves like limited spectrum capacity and help create a more sustainable wireless future by taking advantage of light that already exists in every environment.
Li fi(led transmission of data) presentation
LIFI –”LIGHT FIDEALITY” is transmission of data through illumination, i.e. sending data through a LED light bulb that varies in intensity faster than human eye can follow. Li-Fi is a light based Wi-Fi it uses light instead of radio waves to transmit information.
HISTORY - The technology truly began during the year 1990’s in countries like Germany , Korea and Japan where they discovered LED’s could be retrofitted to send information . Prof. Harald Hass from university of Edinburgh. continues to wow the world with the potential to use light for communication He demonstrated in year 2012.
5. IMPLEMENTATION OF LI-FI The LI-FI product consists of three primary sub assemblies A. Emitter B. RF Driver C. Power Supply
6. FUNCTION OF BULB ASSEMBLY - At the heart of LI-FI is the bulb sub assembly where a sealed bulb is embedded in a dielectric material The dielectric material serves two purposes A. Wave guide B. Electric field
7. RF DRIVER - Power amplifier (PA) assembly that uses an LDMOS device. Converts electrical energy into RF power. The PA is designed to ruggedness and efficiency. The RF driver also contains controls circuit for digital and analog lighting controls.
8. HOW LI-FI WORKS- Operational procedure is very simple, if the LED is on, you transmit a digit 1, if its off you transmit a digit 0. the LED’s can be switched on and off quickly, which gives nice opportunities for transmitting data. hence all that us required is some LEDS and a controller that code data into those LEDs. We have to just vary the rate at which the LEDs flicker depending upon the data we want to encode. Thus every light source will work as a hub for data transmission. IMPLEMENTATION OF LI-FI The LI-FI product consists of three primary sub assemblies A. Emitter B. RF Driver C. Power Supply
6. FUNCTION OF BULB ASSEMBLY - At the heart of LI-FI is the bulb sub assembly where a sealed bulb is embedded in a dielectric material The dielectric material serves two purposes A. Wave guide B. Electric field
7. RF DRIVER - Power amplifier (PA) assembly that uses an LDMOS device. Converts electrical energy into RF power. The PA is designed to ruggedness and efficiency. The RF driver also contains controls circuit for digital and analog lighting controls.
8. HOW LI-FI WORKS- Operational procedure is very simple, if the LED is on, you transmit a digit 1, if its off you transmit a digit 0. the LED’s can be switched on and off quickly, which gives nice opportunities for transmitting data. hence all that us required is some LEDS and a controller that code data into those LEDs. We have to just vary the rate at which the LEDs flicker depending upon the data we want to encode. Thus every light source will work as a hub for data transmission
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The document discusses the potential for using visible light communication (LiFi) as an alternative to traditional radio frequency wireless communication technologies. It notes that the 1.4 million existing cellular base stations use significant energy with low efficiency, while the radio frequency spectrum is limited and issues like availability and security exist. LiFi uses high-speed pulses of light for wireless transmission and has advantages like large available spectrum, high efficiency when combined with LED lights, availability anywhere light exists, and improved security since light does not pass through walls. While it has limitations like needing line of sight and potential external light interference, it has been proven in demonstrations and could see applications like in hospitals, traffic lights, and aircraft once costs decrease.
Li-Fi
Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It was invented by Harald Haas at the University of Edinburgh in 2011 as an alternative to Wi-Fi. Li-Fi transmits data through illumination by taking the fiber out of fiber optics and sending data through a LED light bulb. It provides higher speed, more secure data transmission than Wi-Fi as light cannot pass through walls. Potential applications of Li-Fi include use in traffic lights, hospitals, airplanes, and as a means of wireless internet from street lamps. However, challenges remain around interference from external light sources and the need for line of sight transmission.
Lifi
This document discusses Li-Fi technology, which uses visible light communication to transmit data wirelessly. It was invented in 2011 by Harald Haas. Li-Fi uses LED bulbs to transmit data and has several advantages over Wi-Fi, including higher speeds, lower costs, and greater bandwidth. Key applications of Li-Fi include use in vehicles, classrooms, factories, and aircraft. While Li-Fi has limitations like an inability to pass through solid objects, it could help solve bandwidth issues and allow internet access in places where radio signals are restricted. The document concludes that if adopted more widely, Li-Fi may help create a cleaner, greener future with internet access from every light bulb.
LI-FI
These technology is new and it is very faster and more secure then then the WI-FI.And these technology will be used in some countries. It is in demonstrating stage.
Lifi Technology (By Shashwat Sharma)
This document provides an overview of Li-Fi technology in 18 sections. It begins by defining Li-Fi as a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission instead of radio waves. It then discusses who invented Li-Fi and the development team, provides a brief history, and outlines the need for Li-Fi to address issues with radio spectrum capacity, availability, efficiency and security. The document explains the principles and working of Li-Fi technology, visible light communication, advantages over Wi-Fi, applications, and concludes that Li-Fi has been proven as a technology and could provide faster, more efficient wireless data communication if implemented.
Li-Fi – Light Fidelity (Animated)
LiFi uses visible light communication and LED light bulbs to deliver high-speed wireless internet similar to WiFi. It provides higher bandwidth than radio waves and can be used in places where WiFi signals cannot reach. Some applications of LiFi include using traffic lights and vehicle lights to communicate, providing internet access on airplanes and underwater, and creating safe internet connections in hospitals. However, LiFi requires line of sight and can be interrupted by sunlight or other light sources.
Light-Fidelity [Li-Fi}
Li-Fi stands
for Light-Fidelity is transmission of data through
illumination taking the fibber out of fiber optic by
sending data through an LED light bulb
Lifi technology ppt
Li-Fi is a new technology that uses visible light communication and light-emitting diodes (LEDs) to transmit data wirelessly. It was introduced by physicist Harald Haas and provides data rates faster than Wi-Fi. Li-Fi uses LED light bulbs that vary in intensity faster than the human eye can detect to transmit data. It has advantages over Wi-Fi such as higher capacity, higher efficiency, greater availability, and better security since light cannot pass through walls.
3D Computing ppt.pptx
This document discusses the genesis, working principles, and advantages of LiFi technology. It explains that LiFi was introduced by physicist Harald Haas and uses visible light communication through LED bulbs to transmit data wirelessly. Compared to WiFi which uses radio waves, LiFi has benefits such as higher bandwidth through light, more efficient data transmission through LED lights, universal availability as light sources are everywhere, and better security as light does not penetrate walls.
Li fi
this ppt describe about the visible light communications and how the LED has been used to transmit the data when it is off and on.if the LED is off then it sends 0 if the LED is On then it sends 1 so on it sends due to this we can reduce the use of IR radiations
Li-Fi Technology
This document provides an overview of Li-Fi technology. It discusses how Li-Fi works by transmitting data through LED light bulbs that vary in intensity faster than the human eye can detect. The document outlines the history of Li-Fi development and its implementation which involves an emitter, RF driver, and power supply. It compares Li-Fi to Wi-Fi and lists applications such as in aircraft and hazardous environments. Advantages include larger bandwidth and security, while limitations are not working in the dark and light interference. Future developments could make Li-Fi an efficient alternative to radio-based wireless networks.
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Li fi ppt by Marshall hakkim sit mangalore
- 2. Marshall ECE-B 2 • PRESENT SCENARIO OF WirelessComunicaion • ISSSUES WITH RADIO FREQUENCY SPECTRUM • COMPARING THE EM SPECTRUM • CONSTUCTION AND WORKING OF LI-FI • OVERCOMING THE ISSUES • ADVANTAGES • LIMITATIONS • APPLICATIONS • CONCLUTION
- 3. Marshall ECE-B 3 We have 1.4 million cellular base stations deployed We also have 5 billion of mobile phones Mobile phones transmit 600TB of data every month Presently Wifi uses radio waves for communication
- 5. Marshall ECE-B 5 We transmit wireless data through radio waves. Radio waves are limited. Radio waves are scarce and expensive. We only have certain range of it. With advent of new technologies like 3G, 4G we are running out of spectrum.
- 6. Marshall ECE-B 6 COMPARING THE SPECTRUM
- 7. Marshall ECE-B 7 There are 1.4 million cellular radio base stations. They consume massive amount of energy. Most of this energy is not used for transmission but for cooling down the base stations. Efficiency of such a base station is only 5% and that rise a big problem. EFFICIENCY
- 8. Availability of radio waves or RF signals causes another concern. We have to switch off mobile phones in airplanes. Radio waves cannot be used under water It is not advisable to use mobiles at places like petrochemical plants and petrol pumps, nuclear power plant etc. Marshall ECE-B 8 AVAILABILITY
- 9. Radio waves penetrates through walls. They can be intercepted. If someone has a knowledge and bad intentions then he may misuse it. Marshall ECE-B 9 SECURITY
- 10. Marshall ECE-B 10 What is Li-Fi / VLC ? Use of the visible light portion of the electromagnetic spectrum for data transmission. LED light bulbs are turned into high speed wireless communication devices, somewhat like a Wi-Fi, hence the name Li-Fi (VLC=Visible light Communication)
- 11. Marshall ECE-B 11 Construction and working
- 13. Marshall ECE-B 13 1. CAPACITY 10,000 TIMES MORE SPECTRUM THAN RW. LIGHT DEVICES ARE ALREADY PRESENT, SO INFRASTRUCTURE IS AVAILABLE ALREADY AND INSTALLED. 2. EFFICIENCY HIGHLY EFFICIENT BECAUSE LED CONSUMES LESS ENERGY.
- 14. Marshall ECE-B 14 3. AVAILABLITY LIGHT IS PRESENT EVERYWHERE. CAN BE USED UNDERWATER ALSO. 4. SECURITY LIGHT WAVES DOESNOT PENETRATE THROUGH WALLS. HENCE THEY CAN’T BE INTERCEPTED.
- 15. Marshall ECE-B 15 WE CAN USE LI-FI IN HOSPITALS AND AIRCRFTS ALSO. CHEAPER THEN WIFI , SINCE VISIBLE LIGHT SPECTRUM IS A FREE SPECTRUM BAND. LED CONSUMES LESS ENERGY THOUSANDS AND MILLIONS OF STREET LAMPS CAN BE COVERTED TO LI-FI SPOTS.
- 16. Marshall ECE-B 16 There should be line of sight between sender and receiver Visible light cannot penetrate through solid objects Interference with other electromagnetic waves makes the transmitting data to distort Light cannot approach the range and penetration of radio waves High installation cost of the VLC system.
- 17. Marshall ECE-B 17 • AIRLINES • TRAFFIC LIGHTS • MEDICAL ASPECTS • SMART MUSEUMS • SMARTER POWER PLANTS • ON OCEAN BED
- 18. Marshall ECE-B 18 The possibilities are numerous and can be explored further. If this technology can be put into practical use, every bulb can be used something like Wi-Fi hotspot to transmit wireless data and we will proceed onwards for a.. Cleaner, Greener, Safer and Brighter future.