Wireless Led (2)

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Anuj tomar

0902731018

Ec 3rd year


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Introduction of wireless led

Led

Wireless led

Working

Application

AdvantageDisadvantage

conclusion


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Wireless telecommunications is the transfer ofinformation betweentwo or more points thatare not physically

connected. Distances can be short,

such as a few meters fortelevision remotecontrol, or as far as

thousands or evenmillions of kilometersfor deep-space radiocommunications.


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Wireless led is work on the principal ofinduction.

They can transmit the message signal without

the use of wires so they are called WIRELESSLED.

They used the fm modulation for modulationof audio frequency signal.

They are mainly avaliable in red colour.


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A light-emittingdiode (LED) isa semiconductor light source.

LEDs are used as indicatorlamps in many devices andare increasingly used forother lighting.

Introduced as a practicalelectronic component in1962, early LEDs emittedlow-intensity red light, butmodern versions are

available across thevisible, ultraviolet,and infrared wavelengths,with very high brightness.


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important characteristic is that they aresemiconductor devices capable of fast switchingwith the addition of appropriate electronics.

LEDs can be used as communication devices fortransmitting and broadcasting audio and digitalinformation.

Hence, they can become part of wireless optical

communication systems. This article describes an information system for the

broadcasting of audio and digital signals usingvisible LEDs.


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STAGE 1 STAGE 2


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Serialcommunicationinterface

receiver

Serial

commincation


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As a traffic light controller

It is used in moving message display

boards Wireless led can be used as

communication device in

transmitting and broadcasting audioinformation

It is also used in meseum and


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Due to its low power consumption andmaintenance led are being exchanged withincandescent lights in us and other countries.

It consumes only 15-20w power in compare toincandescent light 150w ,which become very costlywhen used in array of traffic lights.

These led,s are used for transmitting the message

,that can be announced until the next signal ischange.

These led are used for broadcasting the local trafficinformation to both pedestrains and local users.


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The superiority of wireless light emittingdiodes (LEDs) over incandescent lights, due tolong life expectancy, high tolerance to

humidity, low power consumption, andminimal heat generation, is well supported.

No need of wire in wireless led.

To control the traffic signals.

Transfer the information, signal easily from oneplace to another place.


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High setup cost

Necessity of strong network.

They are only used for short distancecommunicatoin.

Maintenance of wireless is not easy.

LED performance largely depends on the ambienttemperature of the operating environment.

LEDs must be supplied with the voltage above thethreshold and a current below the rating. This caninvolve series resistors or current-regulated powersupplies.


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High-brightness LEDs are getting morepopular and are opening up a number of newapplications, especially with improved

efficiency and new colors. Wireless led based on the fast switching of

LEDs and the modulation of visible light isdeveloped into a new kind of information

system.

It can be used as an information beacon forshort-distance communication.


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Wireless Led (2)

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