"Lightemitting diode" Essays and Research Papers

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    light fidelity

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    light –fidelity (Li-Fi) technology came into existence since 2011. Li-Fi is a wireless communication system in which light is used as a carrier signal instead of traditional radio frequency as in Wi-Fi. Li-Fi is a technology that uses light emitting diodes to transmit data wirelessly. Visible light communication (VLC) uses rapid pulses of light to transmit information wirelessly that cannot be detected by human eye. This paper will focus on Li-Fi technology over Wi-Fi technology and challenges for

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    Propeller Clock

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    "Propeller Clock" Mechanically Scanned LED Clock Seven light emitting diodes spin‚ giving the illusion of numbers in the air An Overview: Top View Side View How this clock works: A motor spins the "propeller"‚ and a small microprocessor keeps track of time and changes the pattern on seven LEDs with exact timing to simulate a 7 by 30 array of LEDs. It is an illusion‚ but it works nicely. To build this clock‚ few things are needed‚ including: 1. Skill with motors and mechanical

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    Li-Fi Technology

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    broadband connection. He envisions a future where data for laptops‚ smart phones‚ and tablets is transmitted through the light in a room. And security would be snap – if you can’t see the light‚ you can’t access the data. Keywords: LED (Light emitted diode)‚ Wi-Fi‚ VLC INTRODUCTION LiFi is transmission of data through illumination by taking the fiber out of fiber optics by sending data through a LED light bulb that varies in intensity faster than the human eye can follow.Li-Fi is the term some

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    buck boost converter

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    VISHWAKARMA YOJNA A Project Report Submitted by UDAY TEJANI (100070109030) In fulfillment of the award of the degree Of BACHELOR OF ENGINEERING In ELECTRICAL ENGINEERING BVM Engineering College‚ Vallabh Vidhyanagar Gujarat Technological University‚ Ahmedabad December-2013 BVM Engineering College ELECTRICAL ENGINEERING DEPARTMENT Vishwakarma Yojana: Progress Report-I CERTIFICATE Date:11/12/2013 This is to certificate that the dissertation entitled “VISHWAKARMA YOJNA

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    Sonet Digital Hierarchy

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    * SONET Digital Hierarchy * Synchronous Optical Networking (SONET) is a standardized multiplexing protocol that transfers multiple digital bit streams over optical fiber using lasers or light emitting diodes (LEDs). SONET was designed by the American National Standards Institute (ANSI) for the USA public telephone network in the mid 1980’’s due to the breakup of AT&T. With the breakup‚ numerous regional telephone companies were created and those companies encountered network problems working

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    TABLE OF CONTENTS CHAPTER NAME PAGE NO. * INTRODUCTION 3 * SYSTEM OVERVIEW 4 * BLOCK DIAGRAM

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    Visitor Counter Project Report ------------------------------------------------- Automatic Bidirectional Visitor Counter Project Report Table of Contents Executive Summary2 Introduction2 Working2 Components Used3 89C513 Light emitting diodes (LEDs) 4 Infrared Sensors 4 Seven Segment Display 6 Transistors 7 Circuitry7 Applications8 Future Development8 Conclusion8 1. Executive Summary The objective of the project was to create a circuit with an 8051 microcontroller

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    Amoled Technology

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    Rapidly growing industry - € 100 billion global market Production - growing at about 10% per year Value • Asian suppliers dominate • Market dominated by LCD Technology Introduction OLED: New Technology OLEDs (Organic light-emitting diode) What’s OLED? Polymers that emit light when a current is passed through them in one direction. In multi-pixel colour form‚ OLEDs can be used for displays for ICT‚consumer goods and industrial applications. In the single-pixel form‚ OLEDs can be

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    automatic street light

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    swap to a substitute way of illumination system i.e.‚ by making use of LEDs. This lighting system is constructed to conquer the disadvantages of High Intensity Discharge lamps. This lightning system exhibits the utilization of the Light emitting diodes or LED’s as the source of light and its intensity control is variable which can be altered as per the requirement. LED’s use a lesser amount of power and its life span is good‚ in comparison to the old HID lanterns/lamps. The more vital and motivating

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    Potato Powered Light BUlb

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    fruit can be substituted. The zinc and the copper are the anode and cathode terminals of your potato battery. Using ordinary hook-up electrical wire‚ you can use the potato to create a voltaic cell‚ which will power a VERY small bulb. A light emitting diode (LED) will work fine.  A side note here about voltage & current. This process will produce less than 1.5 volts DC (AA/AAA battery). However‚ producing 1.5 volts does not necessarily produce enough current to make the lamp actually power up to full

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