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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instead of radiowaves and microwaves. The most commonly used scheme for VLC is intensity modulation (IM) and direct detection (DD). In VLC systems with intensity modulation (IM) and direct detection (DD)‚ the modulation bandwidth of light emitting diode (LED) is limited‚ and the dispersion of the channel might cause ISI. Therefore most modulation schemes cannot be used directly for such a system. This project aims to show that a multiple-input multiple output (MIMO) orthogonal frequency division
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INTRODUCTION This is a useful circuit for various purposes. In this circuit a counter is activated when a continuously supplied light is been blocked. It uses a counter IC CD 4033.An LDR enhances the counting process. This circuit an be used for various applications such as to count products going over a belt‚ and for counting persons passed at a point etc The project is done as a prototype and its Real one can display a three to ten digit numbers and can count unto thousands.
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