Fire alarm circuit ABSTRACT Here is a simple fire alarm circuit based on a Light Dependent Resistor (LDR) and lamp pair for sensing the fire. The alarm works by sensing the smoke produced during fire. The circuit produces an audible alarm when the fire breaks out with smoke. When there is no smoke the light from the bulb will be directly falling on the LDR. The LDR resistance will be low and so the voltage across it (below 0.6V). The transistor will be OFF and nothing happens. When there is sufficient
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------------------------------------------------- Purpose of Land Acquisition Act The land acquisition act of 1894 was created with the expressed purpose of facilitating the government’s acquisition of privately held land for public purposes. The word "public purpose"‚ as defined in the act‚ refers to the acquisition of land for putting up educational institutions or schemes such as housing‚ health or slum clearance‚ apart from the projects for rural planning or formation of sites. The word "government"
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PROJECT REPORT ON “SOLAR PHOTOVOLTAIC BASED GENERATION SYSTEMS AND THEIR MAINTENANCE” PROJECT SUBMITTED AT: “APGENCO” (DEPARTMENT OF SOLAR) PROJECT DONE BY K.VENUGOPAL (09011P0208) K.N.V.S. SHALINI(09011P0211) K.PRANEETH (09011P0212) FROM DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY COLLEGE
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Audio/Video Systems PRELIM EXAM – Reviewer December 2012 For ECT04A1 ( prepared by Sir Felixberto M. Gonzaga Jr.) * It blanks out retrace for each H line by making video signal go to the black blanking level at 15‚750 Hz. * horizontal blanking pulses * It includes the camera signal with the picture information‚ sync pulses and blanking pulses. * composite video signal * It times the scanning for each H line at 15‚750 Hz. * horizontal
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different ways: solar heat collectors‚ solar thermal concentrating systems‚ and photovoltaics. Solar heat collectors are collectors that are designed to absorb the heat from the sun. The most common ones are flat plate collectors that have a dark absorber plate that is covered with a transparent plate (usually glass). In between the two plates are pipes that are filled with heat-transferring liquid like antifreeze. When sunlight strikes the absorber plate in the collector‚ the heat is absorbed into
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one day‚ when he is distracted by a fight in the back of the bus. He turns to see what is happening behind him‚ and accidentally strikes and kills two twins riding bicycles in the bike lane. One twin is a brain surgeon‚ and the other is a garbage collector. Each has dependents. Explain how damages will be calculated for each victim‚ and why the families will collect different amounts. Is this a fair system? Why or why
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When I walk into the bourse at the stamp show‚ I note several things all at once. The room is small‚ and approximately 10 dealers have crammed binders and boxes in every available space along the walls and under the tables. A handful of people are milling around the room‚ and a few of them are sitting at some of the dealer tables going through boxes. And the crowd is older. With the exception of a father and his two sons who come in behind me‚ I am probably the youngest person in the room by a decade
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sensor‚ the base gets positive drive to the transistor base. The transistor is ON‚ the collector goes at zero potential. This is the low logic level. This is treated as the‚ healthy condition. NO announciation is there at output. If the fuel level in a tank drops below a certain level‚ the safety level sensor is open.This will cause to cut the base bias of the transistor. As the base bias is cut‚ the collector goes at higher logic potential. This logic pulse will be given to the microcontroller 89C51
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unfolding in this picture. The tax collector in the painting looks frustrated at Christ‚ while Christ has his hand pointed toward Peter. He told Peter to go to the lake and throw out his fish line and to get the first fish he can catch. You can see Peter in the left scene of the painting going fishing. Christ told Peter the fish’s mouth will contain a four-drachma coin that he may give to the tax collector. He is performing a miracle right in front of this tax collector. Once Peter is done‚ you can see
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Transistor A transistor is a semiconductor device used to amplify and switch electronic signals. It is made of a solid piece of semiconductor material‚ with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor’s terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be much more than the controlling (input) power‚ the transistor provides amplification of a signal. Today
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