MOLECULAR ELECTRONICS INTRODUCTION Molecular electronics (sometimes called moletronics) is a branch of applied physics which aims at using molecules as passive (e.g. resistive wires) or active (e.g. transistors) electronic components. The concept of molecular electronics has aroused much excitement both in science fiction and among scientists due to the prospect of size reduction in electronics offered by such minute components. It is an enticing alternative to extend Moore’s Law beyond the
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Solar seeker: In this project we design a solar seeker to follow a sun. solar seeker follow the sun and if the sensor attach on the sensor a sense a sun then solar seeker is stop automatically. Now after some time sun move from its position‚ then again seeker sensor sense the light and move the motor very slowly. If the sensor sense the signal then automatically stop the seeker . Movement of the seeker is restricted from left to right for limited area. To control the left and right limit
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CHAPTER I ------------------------------------------------- INTRODUCTION 1.1 Introduction Portable electronic devices are very popular nowadays. As the usage of these portable electronic devices is increasing‚ the demands for longer battery life are also increasing. These batteries need to be recharged or replaced periodically. It is a hassle to charge or change the battery after a while‚ especially when there is no power outlet around. Therefore‚ our team is inspired to design a wireless
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rectifier with R‚ RL and RLE load. Aim of the Experiment: To simulate 1 – φ half wave uncontrolled rectifier with a) R load b) RL load c) RLE load. And plot input voltage waveform‚ output current waveform‚ output voltage waveform and voltage across the diode. Software Required: (a) Windows Xp or above (b) Matlab 7.0 or above (c) Simulink 2.0 or above Theory: This is the simplest type of uncontrolled rectifier. It is never used in industrial applications because of its poor performance. In a single-phase
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pagina 26 9. ANEXE/ pagina 30 PREDAREA PROIETULUI TEMA 1. CERINTE SI DATE PRINCIPALE Sa se realizeze un convertor pentru alimentarea unui sistem de actionare cu motor asincron trifazat care are urmatoarele caracteristici: Puterea nominala PN= 2‚2+0‚5×N= 2‚2+0‚5×9= 6‚7[kW] Tensiunea nominal UN=3×380/220 [V] Frecventa nominala fN=50Hz Turatia nominal nN=1420 rot/min Randamentul nominal ηN=0‚82+0‚001×N= 0‚82+0‚001×9= 0‚829 Factorul de putere nominal cosφN=0‚82 Cuplul maxim MM= 3×MN =
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conductivity‚ charge densities in a semiconductor‚ Fermi Dirac distribution‚ carrier concentrations and fermi levels in emiconductor‚ Generation and recombination of charges‚ diffusion and continuity equation‚ Mass action Law‚ Hall effect. UNIT 2: Junction diodes‚ Diode as a ckt. element‚ load line concept‚ clipping and clamping circuits‚ Voltage multipliers. Construction‚ characteristics and working principles of UJT UNIT 3: Transistor
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- glands‚ 6. sensory reception-taste buds‚ olfactory membranes 1.3.4 Seven(7) Special Characteristics 1. cellularity: specific cell shapes (e.g. squamous‚ cuboidal…‚ dense‚ little fluid in between cells) 2. specialized contacts: tight‚ gap junctions and desmosomes 3. Polarity: Apical and Basal surfaces Apical faces outwards to exterior of cell‚ Specializations: microvilli in intestines to increase SA Cilia in lungs to propel mucus Basal surface attaches to underlying tissues (CT) 4
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EC1403 MICROWAVE ENGINEERING UNIT-1 - BASIC MICROWAVE COMPONENTS INTRODUCTION TO F MICROWAVE ENGINEERING Modern electromagnetic theory was formulated in 1873 by James Clerk Maxwell solely from mathematical considerations. Maxwell’s formulation was cast in its modern form by Oliver Heaviside‚ during the period 1885 to 1887.Heinrich Hertz‚ a German professor of physics understood the theory published by Maxwell‚ carried out a set of experiments during 1887-1891 that completely
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Overview A transistor is a semiconductor device that amplifies and switches electrical currents. They are the core component of any modern electronic devices‚ such as computer‚ telephones and other electronics. Nowadays most transistors are use to produce integrated circuits. There were a numerous inventions‚ or problems with the inventions that lead to the birth of the transistor. Radio signals‚ could be sent carrying information over a long distance away; the only problem was there was no device
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Chapter 1 Introduction 1.1 Problem It seems these days that everyone has a cellular phone. Whether yours is for business purposes or personal use‚ you need an efficient way of charging the battery in the phone. But‚ like most people‚ you probably don’t like being dependent on the main supply for charging your cell phone battery or you don’t have the time to recharge your cell phone battery. As technology has advanced and made our phones smaller and easier to use‚ we still have one of the original
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