the cooler fan will be OFF when the amplifier is running on low volume. At low volume less heat will be dissipated and it will not trigger the cooler fan ON. The temperature is sensed using an NTC (negative temperature coefficient) thermistor R2. Junction of thermistor r2 and resistor R1 is connected to the inverting input (pin3) of IC1 which is wired as a comparator. The non-inverting input (pin2) is given with a reference voltage using the preset R3. As temperature increases the resistance of NTC
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Sample Paper MANET “MET” Qualifying Entrance Test for B. Tech Marine Engineering / B.Sc.Nautical Science Degree Course Sample Test Paper Date:-2/06/2013 Time – 2 Hrs Total Marks – 150 INSTRUCTIONS & INFORMATION 1. 2. A separate Answer Sheet is provided for answers. You must write your name and form number as well as sign on the answer sheet. 3. All Questions carry one mark each. Marks will only be earned for correct answers. However‚ there will be no negative marking
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CHAPTER 1 : INTRODUCTION 1.1 Introduction Recently‚ we often hear cases of theft manhole made of steel. These thefts often occur because the steel is very valuable when sold. One of my neighbors asked if there are tools that can prevent theft drains. From there I got the idea to create an alarm that can prevent theft from stealing the drain cover becoming increasingly. We begin by examining the case drain theft either inside or outside the country. Too many cases that have occurred that resulted
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------------------------------------------------- Automatic Bidirectional Visitor Counter Project Report Table of Contents Executive Summary2 Introduction2 Working2 Components Used3 89C513 Light emitting diodes (LEDs) 4 Infrared Sensors 4 Seven Segment Display 6 Transistors 7 Circuitry7 Applications8 Future Development8 Conclusion8 1. Executive Summary The objective of the project was to create a circuit with an 8051 microcontroller that senses when an object passed through an infrared receiver’s receive
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INTRODUCTION Stigma can be expressed in various term‚ it can be a brand‚ labelling or identification. It is a differentiation of a person resulting to a boundary between “us” and “them” (Link and Phelan 2001). These affect consumers in a way they are discriminated and treated differently because they have mental illness. The effect of stigma can take away the rights of consumers who are suffering from mental illness causing social dilemmas (SANE Australia 2013). A survey shows 74% of consumers experience
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ACCESS COMPUTER COLLEGE Basic knowledge on Computer System and Digital Electronics (Research Paper for Digital Electronics/Computer System & Org) Jannelle Stephanie S. Chua CSCA22 Engr. Christopher Jay Apalin Computer Science Table of Contents TITLE PAGE I. Title page _________________________________________ 1 II. Table of Content ___________________________________ 2 III. Abstract __________________________________________ 3 – 4 IV. Introduction
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4) Reverse bias permits full current through a pn junction. 5) Semiconductor material of the p-type has few free electrons. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 6) The application of a dc voltage to control diode conduction is called A) a pn junction. B) bias. C) amplification. D) oscillation. 6) 7) Holes are the majority carriers in A) a p-type semiconductor. B) a pn junction semiconductor. C) an n-type semiconductor. D) None
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Abstract This paper will discuss the design of an FM receiver. It will begin with a brief historical backdrop of FM broadcasting and its use in society. It will continue by providing the necessary mathematical background of the modulation process. Furthermore‚ it will enumerate some of the advantages of FM over other forms of modulation‚ namely AM. Finally‚ the paper will discuss the design of a basic FM receiver as well as introduce some circuits and circuit components which the reader may
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of nanodevices as yet undefined‚ because there are many alternatives‚ and it is still too earl’ to tell which will prevail. One solution could be hybrid structure exploiting the advantages of today’s CMOs technology (integration and scaling of transistors and high functional in on a small support). With off-chip opt-electronic interconnects to overcome the throughput bottlenecks. 9.1. I Report Highlights • The global market for nanotechnology will increase from $11.6 billion in 2007 to an estimated
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for discovering the electron tunneling effect used in these diodes. Robert Noyceindependently came up with the idea of a tunnel diode while working for William Shockley‚ but was discouraged from pursuing it.[1] These diodes have a heavily doped p–n junction only some 10 nm (100 Å) wide. The heavy doping results in a broken bandgap‚ whereconduction band electron states on the n-side are more or less aligned with valence band hole states on the p-side Tunnel diodes were first manufactured by Sony in 1957[2]
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