i need to gt the details of working princple,constrctn of led display units ....etc

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a portable instrument for measuring illumination; a type of photometer. The simplest luxmeter consists of a selenium photocell that converts luminous energy into the energy of an electric current, which is measured by a pointer-type microammeter with scales calibrated in luxes (Ix). Different scales correspond to different ranges of the illumination being measured; scale changes are made by a switch that changes the resistance in the electric circuit. For example, a Iu-16 luxmeter has three measuring ranges: up to 25, up to 100, and up to 500 I ....etc

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A ceiling fan is a mechanical fan, usually electrically powered, suspended from the ceiling of a room, that uses hub-mounted rotating paddles to circulate air.

Casablanca Fan Co. Zephyr ceiling fan from the early 1980s.
A ceiling fan rotates much more slowly than an electric desk fan; it cools people effectively by introducing slow movement into the otherwise still, hot air of a room. Fans never actually cool air, unlike air-conditioning equipment, but use significantly less power (cooling air is thermodynamically expensive). Conversely, ....etc

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To get full information or details of construction automatic voltage regulator please have a look on the pages

http://seminarsprojects.net/Thread-automatic-voltage-regulation-technology

if you again feel trouble on construction automatic voltage regulator please reply in that page and ask specific fields in construction automatic voltage regulator ....etc

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constuction and working principle of megger test for motors
construction and working principle of megger

constuction and working principle of megger test for motors
construction and working principle of megger
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A liquid crystal display or LCD draws its definition from its name itself. It is combination of two states of matter, the solid and the liquid. LCD uses a liquid crystal to produce a visible image. Liquid crystal displays are super-thin technology display screen that are generally used in laptop computer screen, TVs, cell phones and portable video games. LCD s technologies allow displays to be much thinner when compared to cathode ray tube (CRT) technology.

Liquid crystal display is composed of several layers which include two polarized pan ....etc

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theory principle and working of led dancing light

A light emitting diode (LED) is known to be one of the best optoelectronic devices out of the lot. The device is capable of emitting a fairly narrow bandwidth of visible or invisible light when its internal diode junction attains a forward electric current or voltage. The visible lights that an LED emits are usually orange, red, yellow, or green. The invisible light includes the infrared light. The biggest advantage of this device is its high power to light conversion efficiency. That is, the e ....etc

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CEILING FAN OBJECTIVE : To study the working, construction And troubleshooting of Ceiling Fan
2. INTRODUCTION A ceiling fan is a device suspended from the ceiling of a room, which employs hub- mounted rotating paddles to circulate air. First electrically powered fan was invented in 1882 by Philip Diehl. Crompton Greaves Ltd is the leading manufacturer of fans.
3. PRINCIPLE If a current carrying conductor is placed in a magnetic field it experience a force and start to rotate. The direction of rotation can be found by Fleming s Left Hand R ....etc

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To get information about the topic Ballistic galvanometer full report ppt and related topic refer the page link below

Ballistic galvanometer

A ballistic galvanometer is a type of sensitive galvanometer, commonly a mirror galvanometer. Unlike a current-measuring galvanometer, the moving part has a large moment of inertia, thus giving it a long oscillation period. It is really an integrator measuring the quantity of charge discharged through it. It can be either of the moving coil or moving magnet type.

Grassot Fluxmeter

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Video LED screen is in fact a large television set. Unlike TV, LED systems are made of separate LED modules into video screens of different sizes and shapes.

Information is relayed to LED modules by controllers which are connected to the controlling computer. A video processor in a PC receives video signals from different sources - standard TV signal, signal from the VCR, DVD-player, video camera, another computer and so on.

Video clips prepared in advance could be recorded on hard drive of the controlling computer and could be displayed acco ....etc

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