applications‚ including uses in programmable output regulation and local on-card regulation. Or‚ by connecting a fixed resistor between the adjust and output terminals‚ the LM317 can function as a precision current regulator. An optional output capacitor can be added to improve transient response. The adjust terminal can be bypassed to achieve very high ripple-rejection ratios‚ which are difficult to achieve with standard three-terminal regulators. LM317 Adjustable
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DC-DC Converter Design for Battery-Operated Systems Harry Arbetter. Robert Erickson. and Dragan Maksimovid Power Electronics Group Department of Electrical and Computer Engineering University of Colorado‚ Boulder‚ CO 80309-0425 USA Abstrurt - This paper describes performance‚ design and optimization of de-dc converters for energy limited‚ battery operated systems. Variable-frequency operation is used to achieve voltage regulation and high efficiency for an extremely wide range of load currents
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1. Table 1: List of components ABSTRACT This project explains the design and construction of a simple FM transmitter. The transmitter is made from identical discrete bipolar junction transistors. Continuous tuning is achieved with a variable capacitor. The designed tuning range was 88MHz to 108MHz. The transmitter can transmit audio signal on a 91.7MHz carrier over a distance of 300meters in open air. INTRODUCTION Frequency modulation (FM) is a technique for wireless transmission of information
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PARITY GENERATOR Vinti Thakkar Swetha Jain Riddhi Vira TE : B-3 TE : B-3 TE : B-3 Roll no : 0812103 Roll no : 0812106 Roll no : 0812114 Email : vinti.thakkar Email : shweta.mjain Email : riddhi1312 @gmail.com 2012@gmail.com
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This circuit can give +5V output at about 150 mA current‚ but it can be increased to 1 A when good cooling is added to 7805 regulator chip. The circuit has over overload and therminal protection. [pic] Circuit diagram of the power supply. The capacitors must have enough high voltage rating to safely handle the input voltage feed to circuit. The circuit is very easy to build for example into a piece of veroboard. [pic] Pinout of the 7805 regulator IC. • 1. Unregulated voltage in • 2
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Chapter 26 Problems 1‚ 2‚ 3 = straightforward‚ intermediate‚ challenging Section 26.1 Definition of Capacitance 1. (a) How much charge is on each plate of a 4.00-μF capacitor when it is connected to a 12.0-V battery? (b) If this same capacitor is connected to a 1.50-V battery‚ what charge is stored? 2. Two conductors having net charges of +10.0 μC and –10.0 μC have a potential difference of 10.0 V between them. (a) Determine the capacitance of the system. (b) What is the potential
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the IR spectra will show a shift of absorption peak to a value slightly grater than 539 cm- attributed to Ti-O bond interaction enhancement. INTRODUCTION 1. Significance of the Study Barium Titanate has become the basic ceramic capacitor dielectric material in use today. As earlier with rutile‚ the main mode of its use has been in combination with other materials [1]. It was the first developed piezoelectric ceramic and is widely used even now. The crystallographic dimensions of
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Experiment 13 Charging and Discharging Capacitors 1. Introduction In this experiment you will measure the rates at which capacitors in series with resistors can be charged and discharged. The time constant RC will be found. Charging a capacitor. Consider the series circuit shown in Fig. 1. Let us assume that the capacitor is initially uncharged. When the switch S is open there is of course no current. If the switch is closed at t=0‚ charges begin to flow and an ammeter will be able
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Power Quality Problems and New Solutions Abstract: In this paper‚ the main Power Quality (PQ) problems are presented with their associated causes and consequences. The economic impacts associated with PQ are characterized. Finally‚ some solutions to mitigate the PQ problems are presented. Key words Power Quality‚ Power Quality problems‚ Power Quality costs‚ Power Quality solutions. 1. Introduction Power Quality (PQ) related issues are of most concern nowadays. The widespread use
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total real power of 400 kW at a power factor of 0.8 lagging. One of the loads draws 120 kW at a power factor of 0.96 leading. Find the complex power of the other load. 4. The load shown in figure 1 consists of resistance R in parallel with a capacitor of reactance X. The load is fed from a single-phase supply through a line of impedance 8.4 + j11.2 . The rms voltage at the load terminal is 12000o Vrms‚ and the load is taking 30 kVA at 0.8 power factor leading. a. Find the values of R and
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