DECLARATION We hereby declare that the project entitled “CELL PHONE BASED DEVICE CONTROL” submitted for the B.Tech Degree is our original work and the project has not formed the basis for the award of any degree‚ associateship‚ fellowship or any other similar titles. Signature of the Students: Place: Date: i ISO 9001:2000 CERTIFIED INSTITUTE Gandhi Institute of Engineering & Technology GUNUPUR – 765 022‚ Dist: Rayagada (Odisha)‚ India (Approved by AICTE‚ Govt. of Orissa
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temperature) the output of the comparator goes high and switches the transistor Q1 ON. This will activate the relay and the cooler fan will be switched ON. When the temperature decreases the reverse happens. LED D2 will glow when the fan is ON. Diode D1 is a freewheeling diode. Components Required 1. Temperature Sensor LM35 2. Op-Amp IC (LM324/741) 3. Motor Driver IC L293D 4. Potentiometer-10k 5. DC Toy motor 6. Propeller 7. 7805 Voltage Regulator
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Automatic Street Light [pic] Submitted By: Introduction Automatic Streetlight needs no manual operation for switching ON and OFF when there is need of light. It detects itself weather there is need for light or not. When darkness rises to a certain value then automatically streetlight is switched ON and when there is other source of light i.e. day time‚ the street light gets OFF. The sensitiveness of the street light canal so be adjusted
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then fed to a Bridge rectifier which converts AC into DC. Then DC output of Bridge rectifier is used to drive the audio-visual alarm circuit‚ connected in parallel. Audio alarm circuit uses a buzzer while visual alarm circuit uses a light emitting diode (LED) connected in series with current limiting resistance. Both‚ audio and visual alarm circuits provide a leakage current alarm (audio-visual) indication‚ which is proportional to the
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Endless Talk time…. By J.SIVASHANKAR CONTENTS ➢ ABSTRACT ➢ INTRODUCTION ➢ CONCEPT OF SELF CHARGING ➢ ACTUAL SETUP FOR WIRELESS CHARGING SAMPLE CIRCUITS WITH TWO STAGES IMPORTANT POINTS CONCLUSION ABSTRACT T he Cellular revolution has spread to every nook and corner of the world and connected distant parts of the globe
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This section consists of five (5) questions each worth one (1) mark. ALL questions in this section should be answered. Read the following statements carefully. Circle T if the statement is TRUE and F if the statement is FALSE. 1. Semiconductor diodes are composed of two kinds of silicon. T F 2. In the logic system‚ the state Logic 0 represents a closed switch T F and Logic 1 represents an open switch. 3. A high output will be produced
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Instructor’s Resource Manual to accompany Electronic Devices and Circuit Theory Tenth Edition Robert L. Boylestad Louis Nashelsky Upper Saddle River‚ New Jersey Columbus‚ Ohio Copyright © 2009 by Pearson Education‚ Inc.‚ Upper Saddle River‚ New Jersey 07458. Pearson Prentice Hall. All rights reserved. Printed in the United States of America. This publication is protected by Copyright and permission should be obtained from the publisher prior to any prohibited reproduction‚ storage in
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Review for final 1. What is the device that allows AC to pass through an amplifier circuit while blocking DC? a. Regulator capacitor b. Coupling capacitor c. Rheostat d. Diode 2. Which amplifier has the BJT as the most commonly used amplifier? a. CC b. CB c. CE d. Op-amp 3. How do we determine the voltage gain of the common-emitter amplifier? a. Divide the AC collector resistance by the AC emitter resistance b. Divide the AC collector resistance by the AC base resistance c. Divide the AC emitter
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detection is done to detect the received ultrasonic signal. This is the half-wave rectification circuit with Shottky barrier diodes. The DC voltage according to the level of the detection signal is output to the capacitor behind the diode. The Shottky barrier diodes are used because the high frequency characteristic is good. As for the Shottky barrier diode‚ refer to "Diodes". Signal detector This circuit is the circuit which detects the ultrasonic which returned from the measurement object.
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for protecting the transistor when R4 is turned towards low resistance values. Resistor R2 and R1 forms a feedback network for the TDA2002 and C1 couples the feed back signal from the junction of R1 & R2 to the inverting input of the same IC. The diode D1 and D2 in combination drops 1.4 V to give the rated voltage (3.5V ) to UM66. UM66 cannot more than 4V. CIRCUIT DIAGRAM Power supply for the circuit. A well regulated power supply is essential for this circuit because
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