British Journal of Science 1 September 2011‚ Vol. 1 (2) © 2011 British Journals ISSN 2047-3745 Development of a GSM Based Household Power Management System Ganiyu R. A.‚ Arulogun O. T.‚ Adetunji A. B. and Okediran O. O. Department of Computer Science and Engineering‚ Ladoke Akintola University of Technology‚ P.M.B 4000‚ Ogbomoso‚ Nigeria. ABSTRACT Household power management system provides a means of controlling home appliances remotely using mobile phone. In this paper‚ we mainly focus on
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design‚ experiments and characterization plots reveal approximately 100% improvement over other existing designs in the power range of 20 to 7 dBm. Index Terms—Optimization‚ power efficiency‚ radio-frequency (RF) energy harvesting circuit‚ Schottky diode‚ sensor‚ voltage multiplier‚ 915 MHz. I. INTRODUCTION W ITH the growing popularity and applications of largescale‚ sensor-based wireless networks (e.g.‚ structural health monitoring‚
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constructed using Zener diodes to maintain the SOC between desired levels. The MOSFET inverter is built using an H-bridge with opposite switches sharing the same gate. The advantages of such inverters are that the circuit dissipates power only during switching event. And its voltage transfer curve follows a sharp transition. III. SIMULATION RESULTS Traditionally small scale Wind Energy Conversion Systems (WECS) uses a simple diode bridge rectifier to convert the given AC to DC. A diode bridge rectifier
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Raising Teens A Synthesis of Research and a Foundation for Action A. RAE SIMPSON‚ PH.D. Project on the Parenting of Adolescents Center for Health Communication Harvard School of Public Health This project was supported by a grant from The John D. and Catherine T. MacArthur Foundation Raising Teens A Synthesis of Research and a Foundation for Action A. RAE SIMPSON‚ PH.D. Project on the Parenting of Adolescents Center for Health Communication Harvard School of Public Health This project
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Please click on paper title to view Visual Supplement. ISSCC 2009 / SESSION 20 / SENSORS AND MEMS / 20.6 20.6 A Compact CMOS MEMS Microphone with 66dB SNR MOS model). The optimal M1‚2 width (W) is determined for several M1‚2 lengths (L) and bias current Ibias‚ and the overall optimal set of values is W=600µm‚ L=3µm‚ Ibias=53µA. Noise measurements show that 1/f noise has a slightly higher impact than does white noise‚ when both contributions are A-weighted. The expected SNR degradation introduced
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Introduction Aim of the project Block diagram Components used Rectifier diodes Transistor 78XX regulator IC NE 555 Timer IC Resistor Capacitor Relay Circuit diagram Circuit operation Applications Advantages Disadvantages Limitation Future scope Conclusion Bibliography Introduction: We have seen many more times that our street light were turned On even inday time also. This shows that we are wasting much power even it may be saved and supplied for any crop fields for several hours. Here
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My View of Childhood The Oxford dictionary states that Childhood is ‘The state or period of being a child’. Individual’s definition of childhood differs immensely depending on their social background‚ religion‚ culture and many other effecting influences. My view of childhood is that it provides an introduction to the society. I believe that‚ while Individuals are within their childhood state‚ they should be able to learn and develop without any worry. This can happen if a child is provided with
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My favorite British writer and his famous book ’Treasure Island’ My favorite famous British writer is Robert Louis Stevenson. Robert Louis Stevenson was born in Edinburgh‚ Scotland‚ in 1850. Robert went to Edinburgh University to study law. Later on he decided that he wanted to be a writer‚ not a lawyer. In his early 20s he became ill with a chest problem. He suffered from this for the rest of his life. He moved from place to place‚ trying to find a suitable climate. In 1880 Robert married an American
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system‚ the input electrical signal is in the form of coded digital pulses from the encoder and these electric pulses modulate the intensity of the light from the laser diode or LED and convert them into optical pulses. In the receiver stage‚ the photo detector like avalanche photodiode (APD) or positive-intrinsic-negative (PIN) diode converts
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nonlinear I–V equation by adjusting the curve at three points: open circuit‚ maximum power‚ and short circuit. Given these three points‚ which are provided by all commercial array datasheets‚ the method finds the best I–V equation for the single-diode photovoltaic (PV) model including the effect of the series and parallel resistances‚ and warranties that the maximum power of the model matches with the maximum power of the real array. With the parameters of the adjusted I–V equation‚ one can
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