A MAJOR PROJECT ON CELL PHONE BASED VOTING MACHINE SUBMITTED IN THE PARTIAL FULFILLMENT OF REQUIRMENT FOR THE AWARD OF THE DEGREE OF BACHELOR OF TECHNOLOGY IN ELECTRONICS & COMMUNICATION ENGG. FROM KURUKSHETRA UNIVERSITY‚KURUKSHETRA SUBMITTED BY: GUIDED BY: NIKHIL (1705429) Prof. G.C. Lall HEMANT KUMAR (1705433) CO-GUIDED BY: PRIYANSHU CHAUHAN (1705439) Asstt. Prof. Vijay Lamba DEPTT. OF ELECTRONICS & COMMUNICATION ENGINEERING HARYANA COLLEGE OF TECHNOLOGY
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functions‚ transient response of closed loop drive systems‚ frequency response approach MFE2 : POWER ELECTRONICS CONVERTERS - I 1. POWER SEMICONDUCTOR DIODES Introduction‚ Diode Characteristics‚ Reverse Recovery Characteristics‚ Power Diode Types‚ Effects Of Forward And Reverse Recovery Time‚ Series-Connected Diodes‚ Parallel-Connected Diodes. 2. THYRISTORS Introduction‚ Thyristor Characteristics‚ Two-Transistor Model Of Thyristor‚ Thyristor Turn-On‚ Di/Dt Protection‚ Dv/Dt Protection‚ Thyristor
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technological breakthroughs having novel nano device application. Develop graphene sheet (GS) used for different applications. It can be utilized for mobile applications‚ solar cells‚ combine with storage material and organic light emitting diode. Introduction and Background Graphene based companies are emerging as new class of materials that are having several applications. Graphene a single sheet of graphite posses extraordinary electrical‚ thermal and mechanical properties arising
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See TALKING ELECTRONICS WEBSITE email Colin Mitchell: talking@tpg.com.au For our other free eBooks: 50 - 555 Circuits 1 - 100 Transistor Circuits 101 - 200 Transistor Circuits 100 IC Circuits For a list of every electronic symbol‚ see: Circuit Symbols. For more articles and projects to suit the hobbyist: see TALKING ELECTRONICS WEBSITE INTRODUCTION This e-book covers a number of interesting circuits. They have been presented for
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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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NUS ECE Course Outline 1. Introduction to Electrical Engineering Introduction to some practical electrical engineering examples. 2. Magnetic Circuits and Transformers Principles of mutual inductance and transformers. 3. DC Power Supply Diode characteristics. Rectifier circuits. Bridge rectifiers. 4. Brief Introduction to DC Motors Basic principles of operation of DC motors. 5. Digital Logic Circuits Digital logic. Boolean algebra. Combinational logic. Logic circuit design. EG1108
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MATRIX CONVERTERS Dr Pat Wheeler‚ Dr Jon Clare‚ Dr Lee Empringham‚ Mr Maurice Apap and Mr Michael Bland School of Electrical and Electronic Engineering University of Nottingham‚ Nottingham‚ UK Tel. +44 (0) 115 951 5591‚ Fax. +44 (0) 115 951 5616‚ email. Pat.Wheeler@Nottingham.ac.uk SUMMARY Recently there has been considerable interest in the use of matrix converter technology for motor drive applications‚ with particular interest being shown by Siemens‚ Rockwell and Yaskawa. This paper gives
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Statement of Purpose At this juncture‚ where I have made one of the most crucial and obvious decision of my professional career‚ I would like to list the factors that influenced me most and went into the making of this decision. Electronics Engineering has made an indelible mark on my psyche right from my school days. School made me realize my potential and what I was capable of. There was an opportunity for almost any and everything. By the time I reached senior school‚ I participated in elocutions
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to control the rotation of the motor in either XZ or YZ plane. Fig. 1 shows the block diagram of the stepper motor control system. The power supply section (in Fig. 2) consists of a stepdown transformer (7.5V AC‚ 1A)‚ bridge rectifier (comprising diodes D1 through D4)‚ filter capacitors (C1 and C2) and regulator IC 7805. We have used here an Atmel make low-power‚ high-performance‚ 8-bit CMOS microcontroller AT89C51 with 4 kB of Flash p rogrammable and erasable read-only memory (PEROM). It has a 128x8-bit
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to V (current-to-voltage) converter and converts temperature variations into voltage variations. To amplify the change in voltage due to change in temperature‚ instrumentation amplifier formed by op-amps A2‚ A3 and A4 is used. Resistor R2 and zener diode D1 combination is used for generating reference voltage as we want to amplify only change in voltage due to the change in temperature. Op-amp µA741 (IC2) works as a comparator. One input to the comparator is the output from the instrumentation amplifier
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