Development of street lighting system-based novel high-brightness LED modules
The development of high-power light emitting diode (LED) for street lighting is a continuously evolving topic. greater energy efficiency, long operating life and light control are the major plus points of this technique. 9LEDM (9-LED module) and adaptive driver based alternative lighting system is shown here. thermal, photometric, power electronics techniques have been used to create the 9 LEDM. The 9LEDM offers a price less than 1$/Watt (W) and luminous fl ....etc

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FPGA based LED illumination Control System

The resource utilization can be improved by the dynamic reconfiguration technique based on FPGA. The methods and prociples for dynamic reconfiguration is discussed in this article. Here, Xilinx Virtex-ⅡFPGA and SMCS Ethernet PHY (Physical Layer Transceiver) is utilised to implement a remote dynamic reconfiguration scheme. The RFDRS (Remote FPGA Dynamic Reconfiguration System) can remotely control the changes freely in the eight LED (Light emitting diodes) lighting modes. This method can be ....etc

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Here is a rechargeable LEDlamp that gives you brightlight for a long duration oftime as it consumes little power. Thecircuit presented here is compact, automatic,reliable, low-cost and easy toassemble.The circuit comprises power supply,battery charging and switching sections. The power supply sectiontakes power from 230V AC mainssupply without using a transformer.Capacitor C1 is used as an AC voltagedropper—a well-known transformerlesssolution. This helps to make thecircuit compact without generatingheat, as capacitor C1 dis ....etc

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ABSTRACT
High intensity discharge lamp (HID) presently used for urban street light are based on principle of gas discharge, thus the intensity is not controllable by any voltage reduction method as the discharge path is broken. White Light Emitting Diode (LED) based lamps are soon replacing the HID lamps in street light. Thus intensity control is now possible by pulse width modulation based on sensing the movement and density of vehicles. The pulse width becomes very narrow on sensing no movement of vehicles. As the ....etc

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I need illumination with solid state lighting ppt ....etc

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details about in the power of the incandescent lamp used to illuminate
the LDR keeping all the lamp at a fixed distance
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A Light emitting diodes (LEDs) have gained broad recognition as the ubiquitous little lights that tell us that our monitors are on, the phone is off the hook or the oven is hot semiconductor.

The basic principle behind the emission of light is that: When charge carrier pairs recombine in a semiconductor with an appropriate energy band-gap generates light. In a forward biased diode, little recombination occurs in the depletion layer. Most occurs in a few microns of either P- region or N ?region, depending on which one is lightly doped.

LE ....etc

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pls send abstract on high intensity energy efficient led light ....etc

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what is the role of ic 7805 in air flow detector experiment.. ??
....etc

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Light emitting diodes (LEDs) have gained broad recognition as the ubiquitous little lights that tell us that our monitors are on, the phone is off the hook or the oven is hot semiconductor. The basic principle behind the emission of light is that: When charge carrier pairs recombine in a semiconductor with an appropriate energy band-gap generates light. In a forward biased diode, little recombination occurs in the depletion layer. Most occurs in a few microns of either P- region or N –region, depending on which one is lightly doped. LED ....etc

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