plz mail urgent ppt and full report..Bright blue: Advanced technologies for marine environmental monitoring and offshore energy ....etc

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Here we have explained a dark detector circuit by using 555 timer IC and a LDR (Light Dependent Resistor) which senses the light in surroundings and if it does not find the light, it triggers the IC and glows an LED attached with the circuit. In place of LED we can also use a buzzer or speaker to use it as dark detector alarm. The concept of this circuit is quite simple and based on the working of LDR. So lets first understand more about LDRs.
LDRs are a type resistors made from semiconductor materials to enable them to have their light sensit ....etc

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Abstract Test card for color TV is a widely used method to evaluate the quality of a TV set directly. We have made a test signal generator (which can also generate synchronizing (abbreviated to sync hereafter) signals) mainly based on microprocessor Z-80. Taking the advantage of microprocessor programming, combining with the technique of microprocessor, digital circuits and analogue devices, we use software as far as possible to generate signals directly or to simplify the controlling circuits. Those signals, such as composite sync signal, bla ....etc

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hi.. please send me the report of dark room machining.. thank u.. ....etc

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1. INTRODUCTION
An electrodeless lamp is a light source in which the power required to generate light is transferred from the outside of the lamp envelope by means of (electro)magnetic fields, in contrast with a typical electrical lamp that uses electrical connections through the lamp envelope to transfer power. There are three advantages of eliminating electrodes:
Extended lamp life, because the electrodes are usually the limiting factor in lamp life.
The ability to use high efficiency light-generating substan ....etc

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SUPER BRIGHT LED FLASHER



This is a novel flasher circuit using a single driver transistor that takes
its flash-rate from a flashing LED. The flasher in the photo is 3mm. An
ordinary LED will not work. The flash rate cannot be altered by the
brightness of the high-bright white LED can be adjusted by altering the
1k resistor across the 100u electrolytic to 4k7 or 10k. The 1k resistor
discharges the 100u so that when the transistor turns on, the charging
current into the 100u illuminat ....etc

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request for synopsis of dark detector circuit using ne555 timer ....etc

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LDRs are made from semiconductor materials to enable them to have their light sensitive properties. There are many types but one material is popular and it is cadmium sulphide (CdS). These LDRs or PHOTO REISTORS works on the principle of Photo Conductivity . Now what this principle says is , whenever light falls on the surface of the LDR (in this case) the conductance of the element increases or in other words the resistance of the LDR falls when the light falls on the surface of the LDR. This property of the decrease in resistance for the LD ....etc

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sir give me ppt slides of dark detector and also give idea about project report on dark detector ....etc

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