NT1310 Unit 9 Assignment 1 A light-emitting diode (LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for general lighting. Appearing as practical electronic components in 1962‚ early LEDs emitted low-intensity red light‚ but modern versions are available across the visible‚ ultraviolet‚ and infrared wavelengths‚ with very high brightness.When a light-emitting diode is switched on‚ electrons are able to recombine with holes
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2.0 Background of Study 2.1 LED A light-emitting diode (LED is a semiconductor light source. LEDs are used as indicator lamps in many devices‚ and are increasingly used for lighting. Introduced as a practical electronic component in 1962‚ early LEDs emitted low-intensity red light‚ but modern versions are available across the visible‚ ultraviolet and infrared wavelengths‚ with very high brightness. When a light-emitting diode is forward biased (switched on)‚ electrons are able to recombine
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this lab students experimented with light emitting diodes. The student built a basic circuit with two LED’s and resistors in parallel. The results showed that the voltage is the same in parallel. The items that were in series had the same current. The results also showed that the current from each branch could be summed up to equal the total current from the source. The experiment also helped the student to see the voltage drop across the diode was almost the same each time. This lab showed the
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AUTO MUTE FOR AUDIO DECK (Automatically Mute Your Audio System when you receive a call) Muting car’s audio deck‚ while talking on cell phone is an important yet difficult task. This project is designed to solve the problem. A sensitive IR transmitter and receiver pair is designed and fixed to a cell phone holder. Always the cell phone should be placed in the holder. The transmitter unit continuously transmits IR rays. These IR rays are interrupted by the cell phone. Whenever the cell phone
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solid-state lamp that uses light-emitting diodes (LEDs) as the source of light. LED lamps offer long service life and high energy efficiency‚ but initial costs are higher than those of fluorescent and incandescent lamps. Chemical decomposition of LED chips reduces luminous flux over life cycle as with conventional lamps. Commercial LED lighting products use semiconductor light-emitting diodes. Research into organic LEDs (OLED)‚ or polymer light-emitting diodes (PLED) is aimed at reducing the production
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MEANING OF PROJECT Project means a complete scheme which consist of detailed technical report‚ design‚ drawing notes‚ specification‚‚ estimate circuit. The project give full detail of all the work required for the structural and financial aspect. The word project consist seven alphabet and every alphabet has importance itself which is given below : P→ PLANING R→RESOURCE O→OPERATION
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Introduction: Lighting is an essential service in all the industries. The power consumption by the indusrtial lighting varies between 2% to 10% of the total power depending on the type of industry. Innovation and continuous improvement in the field of lighting‚ has given rise to tremendous energy saving opportunities in this area. The simplest and the most widely used form of controlling a lighting installation is "On-Off" switch. In the electrical lighting system in our community‚ especially
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specific environments (hospitals‚ airplanes etc.) where Wi-Fi is not allowed due to interferences or security considerations. Keywords— WI-FI‚ VLC‚ photo detector‚ lamp driver‚ LED (Light Emitting Diode) I. INTRODUCTION Li-Fi or Light Fidelity is a technology that uses light emitting diodes to transmit data wirelessly. It was first demonstrated at a TED talk in 2011 by German physicist Harald Haas. This is a free band that does not need any license. Hence it is cheaper than Wi-FI. Wi-Fi
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for Light Emitting Diode‚ which is a semiconductor lighting material. It was firstly introduced as an applicable electronic element in 1962. The early versions of LED could only emit low-intensity light‚ whereas the modern ones are proved to be able to deliver light with incredible brightness. Except for the conventional semiconductor light emitting diodes‚ there are other two advanced LED products‚ the organic light emitting diodes (OLED) and the polymer light emitting diodes
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1. Company Background Royal Phillips was founded in 1891 when Gerard and Frederick Phillips purchased a factory in Eindhoven‚ Netherlands. They began their operations in 1892 producing carbon-filament lamps and other electro-technical products. In 1895 Gerard’s younger brother Anton began working at the factory. With the help of Anton‚ the light wire bulbs he designed began to be produced in mass quantities‚ helping the company begin to expand. By 1920 they were mass producing cathodes and high
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