Dissertation Paper

Exposition Paper Exposition Paper Exposition Paper University understudies once in a while feel lost and baffled when they face the need of composing a thesis paper. Extremely, this undertaking is a convoluted one; it takes a ton of time and exertion to compose an exposition. Anyway, you have no other way out with the exception of start work. Try not to surrender, as you are decidedly ready to take the test. In this paper you will locate some helpful hints on the most proficient method to begin work. Pick your point According to the Asian saying, the initial step is halfway. For you this initial step, picking your subject, is truly significant. It relies upon your decision whether your work will be intriguing for you or exhausting, regardless of whether it will be simple or hard to track down information for your exposition paper, and, at long last, whether the staff will support you. You will maybe need to have some primer perusing around your theme before you settle on your decision. However, don't burn through you r time, it is no utilization skipping starting with one point then onto the next. At the point when you believe that you have discovered what you need, counsel the staff. It is imperative to discover a director, having a profound information regarding the matter, who will support you. Make an unpleasant schedule of your work It may be not exceptionally simple to design the work on your thesis paper, which will keep going for a considerable length of time. Understudies some of the time hurry to begin their work, yet they don't have a clue where to go. That is the reason they may, for instance, invest bunches of energy gathering proof, yet they will be amazingly shy of opportunity with regards to book reference. All things considered, it is smarter to set up your plan at the earliest reference point of your work, as it will shield you from restless evenings before the last cutoff time. Counsel your manager You realize that your thesis paper is relegated to you to furnish you with the chance to build up your scholarly aptitudes. A few understudies imagine that they can work completely autonomously. Others simply don't have the foggiest idea how to adapt to this assignment and don't do anything. Them two aren't right, as keeping away from the administrator is an extremely serious mix-up. On the off chance that you need your exposition paper to present to you the most noteworthy conceivable imprint, counsel your manager at whatever point you need proficient assistance. All things considered, we trust that making an exposition paper will be the most intriguing and productive involvement with your examinations.

Questionnaire Essay Example | Topics and Well Written Essays - 1000 words - 2

Survey - Essay Example derage Drinking, 2006) Even however drinking is disallowed lawfully for under matured youngsters in numerous nations, numerous kids as a rule devours liquor before they arrives at the legitimate age for drinking. Under matured youngsters numerous not have the development to control their feelings affected by liquor and henceforth there is an expanded likelihood for them to participate in against social exercises and consequently this exploration has gigantic significance in contemporary society. â€Å"It is currently usually accepted that the normal youngster will have seen 100,000 lager ads between the age of two and eighteen† (Hanson, 1997) The lawful age for drinking is diverse in various nations; running from 0 to 21. US has the most noteworthy savoring age the existence where just the individuals who have finished 21 years old can drink lawfully. Yet, in nations like China, Thailand and Viet Nam, there is no age limitation for drinking. In Austria Italy like nations the lawful age for drinking is 16 while in Argentina and Israel it is 18 years. (Hanson, 1997) The survey has been settled on basic and various options were offered to make the response straightforward. The inquiries were made after conversations with certain specialists who have just considered this subject. This examination has been directed essentially on the web. The poll given toward the finish of this paper has been distributed on web and the information gathered from the respondents. Kids who are from UK, between the ages of 12 †18 were approached to take an interest in this examination. This exploration was constrained to UK youngsters so as to normalize the outcomes. Also around 2000 offspring of a similar age bunch have been drawn closer straightforwardly by visiting schools situated at various pieces of the nation and gathered data with respect to their drinking propensities. All things considered around 12500 information has been gathered completely. The information has indicated that around 6750 (54%) of the respondents drink at any rate once every day. Around 3200

Public service announcement

Public service announcement One thing Ive been hearing from prefrosh at an alarming frequency lately is that MIT is a competitive and cutthroat place, and that collaborative behavior is rare. Let me first say this is not true. Most stereotypes have at least a grain of something resembling truth to them for instance, many people in Boston do like the Red Sox and say ah instead of r; many girls do like to talk about their feelings, and many white boys do suck at dancing. In this case, however, I dont see the connection between stereotype and reality. At all. I think it must be that people confuse difficult with competitive/cutthroat (which, I might add, is a confusion not supported by my friends Merriam and Webster). Sure, MIT is difficult. This is partially because the courses are inherently difficult, partially because professors enjoy foisting difficult problem sets upon their students, and partially because MIT students secretly love to work right at the edge of their abilities. But this difficulty is what fosters, rather than discourages, a collaborative atmosphere. Freshman year, most students take the General Institute Requirements and learn that the fastest (and most fun) way to get through problem sets is to do them in a big group of your friends with lots of snacks and pizza; this behavior doesnt really change through the upper years. Adam is an aero/astro major, and course 16 is generally considered one of the most difficult majors at MIT. During sophomore year, all course 16 majors take a four-class series called Unified Engineering (when a class is known by its name rather than its number at MIT, you know its bad news). Each year, there are about 70 kids who declare aero/astro as a major and take Unified; literally all of them would gather on campus and work on problem sets together. I mean, what good does it do you to be competitive? Nobody would help you with the problem sets, and then youd be screwed. Adams take on the matter This freshman asked me the other day if course 16 was a competitive major. I was like Wha? *confused face* What does that even mean? My own majors, biology and brain and cognitive sciences, are pretty premed heavy. If theres any place at MIT youd expect to be cutthroat, its the place where premeds congregate, right? Well, I still didnt see any cutthroat behavior. Any time I had a question or needed help on a problem set, I had no problems securing that help. Ever. I feel silly even offering a list of times I experienced MITs collaborative environment, since most of them are so mundane. Its just normal to be helpful around here. One of the first things people realize when starting classes here is that competition stops at MITs front door. Everybody here was smart in high school (duh), and most people had to fight to get the opportunities that made them strong candidates for admission. Well, you dont have to fight anymore once youre here. UROPs practically grow on trees, and most student groups are open to anybody who wants to join. The only person with whom youre competing anymore is yourself. Again, I am not saying that collaborative behavior is pretty much normal, and that cutthroat behavior is fairly rare. Im saying that everybody here collaborates with everybody else, and that people simply dont act in a way thats destructive toward other people. (At least with regard to academics. When it comes to romantic and social relationships, MIT students act just like any other group of 18- to 22-year-old people.) I guess my feeling is that something has to be easy to be cutthroat there has to be the possibility that everybody could get a 100% or something, so people take it upon themselves to make sure that other people dont succeed. Here, its more that everybody could get a 0%, so people take it upon themselves to make sure that other people are doing well also. Thats the benefit of difficulty it tends to make people feel that theyre all in the same boat together. So no, MIT is not a cutthroat, competitive place. Any questions?

Puck The Heart and Soul of A Midsummer Night’s Dream Essay

â€Å"Puck: The Heart and Soul of A Midsummer Night’s Dream† Within the genre of melodrama, the atmosphere and emotions of a story are romanticized and magical. Not only does it engage the audience emotionally, but it is also meant to be performed in a very exaggerated manner. William Shakespeare incorporates this melodramatic style into his plays with a specific purpose in mind. In A Midsummer Night’s Dream, Shakespeare utilizes the sprightly character of Puck to reinforce the complexity of love, and the idea that magic sometimes causes more harm than good. Although there is no definitive protagonist, Puck stands out as a character who steers the direction of the plot and gives movement to the actions that occur throughout the story. His†¦show more content†¦Puck considers human emotional distress to be trivial, leading him to view their dilemma with amusement rather than empathy. In the end, however, he alleviates the dramatic tension that he had created between the lovers. After observing the senseless behavior of the Athenian lovers, Puck exclaims to Oberon, â€Å"Lord, what fools these mortals be† (III.ii.115)! This line, aimed at Lysander’s foolish behavior is meant to be humorous, but it also cleverly addresses the prominent theme of the story: that love is not under human control. Puck is clearly referring to the foolishness and exaggerated emotions of the four lovers in the play; however, Shakespeare also intends to target the audience members by emphasizing that humans in general have the tendency to do and say crazy things because of love’s powerful grasp on their emotions. Therefore, a character such as Puck, according to Robert Diyanni, â€Å"may remind us in some ways of ourselves; they may appeal to us because they differ from us† (Diyanni 1270). Although the Athenian lovers neglect to realize the extent of their ludicrous behavior, their unbalanced emotions are very noticeable to the fairies, who replace the au dience’s role in this scene. Moreover, it signifies the contrast between both the human lovers, who become so entangled in a disarray of emotion, and the enchanting fairies, always playful and rascally inShow MoreRelatedWeathering the Storms of True Love1159 Words   |  5 Pagesfrom the truth. Shakespeare presents the truth about true love in his comical tragedy A Midsummer Nights Dream. Lysander clearly stated loves situation when he told Hermia the course of true love never did run smooth (Griffiths 94). In some ways Lysanders declaration becomes the plays structural and thematic point by which Shakespeare uses to explore the storms of love (Bloom 12). In A Midsummer Nights Dream, Shakespeare uses young lovers to depict how love masters young people and pushes themRead MoreA Midsummer Night s Dream By William Shakespeare1751 Words   |  8 Pages What types of dream really impress you in your life? Would that be funny dreams, weird dreams, scary dreams, risq ue dreams, dramatic dreams, life-changing dreams, and even lucid dream stories. As a matter of fact, people’s dreams can be a kind of illusion because dreams skew their daily life into confusion—people cannot recognize reality and unreality easily. Similarly, love not only is imaginative, but also can make people get confused just like dream. The comedicRead MoreUnreality in A Midsummer Nights Dream1693 Words   |  7 PagesUnreality in A Midsummer Nights Dream Shakespeares A Midsummer Nights Dream is a play that encompasses three worlds: the romantic world of the aristocratic lovers, the workday world of the rude mechanicals, and the fairy world of Titania and Oberon. And while all three worlds tangle and intertwine during the course of the play, it is the fairy world that has the greatest impact, for both the lovers and the mechanicals are changed by their brush with the children of Pan. For those whoseRead MoreAnalysis of the Painting Hermia and LYsander by John Simmons968 Words   |  4 PagesIntro: In the painting of â€Å"Hermia and Lysander† by John Simmons, it portrays the scene in Shakespeare’s Midsummer Nights Dream when Hermia and Lysander are in the forest, and Lysander persistently invites Hermia to sleep with him in the cold, dark forest. The love of Hermia and Lysander is reciprocated but remains uncertain and quite mysterious at times. When Hermia says no to the convincing and authoritative Lysander, she is left with no choice but to abide to her morals. However, she is worriedRead MoreWilliam Shakespeare s Romeo And Juliet1279 Words   |  6 PagesLiterature affects every aspect of our lives. The great, classic writers teach timeless, valuable life skills. Shakespeare was the greatest writer of all time. His writings mainly consisted of dramas and sonnets. Romeo and Juliet, as well as, A MIdsummer Night’s Dream were written about the same time period. He was able to inter relate everything that wrote. For example, the tale of Pyramus and Thisb e could possibly be an advertisement for Romeo and Juliet. The basic structure of the two dramas is theRead MoreWilliam Shakespeare s A Midsummer Night s Dream1245 Words   |  5 PagesThe play, A Midsummer Night’s Dream, involves several different couples; Theseus and Hippolyta, Lysander and Hermia, Helena and Demetrius, Titania and Bottom, and Titania and Oberon. What aspects of love are explored in each of these relationships and what point is Shakespeare trying to make about love. Shakespeare shows love in multiple ways, whether its mature, forbidden, married, spell-bound, or unrequited. By doing this Shakespeare is trying to suggest that love really is an obstacle course thatRead MoreA Midsummers Night Dream and As You Like It Essay2193 Words   |  9 Pagesexplores this comparison through the role and purpose of the forests in Midsummer Nights Dream and As You Like It. Midsummer Nights Dream focuses on imagination and escape, while As You like It focuses on reality a nd self discovery. The forest in Midsummer Nights Dream represents imagination. Puck, a fairy servant and friend of Oberon, watches six Athenian men practice a play to be performed for Theseus wedding in the forest. Puck turns Nick Bottoms head into that of an ass. The other players seeRead MoreModern-Day Adaptations of Shakespearian Plays3263 Words   |  14 Pages Two Shakespearian plays that have been adapted many times are A Midsummer Nights Dream and Hamlet. Both plays deal with the difference between reality and the semblance of reality and the madness that can occur if we confuse the two. While A Midsummer Nights Dream deals with the reality-distorting drug known as love, Hamlet is about accepting artifice for reality. Two interesting adaptations of A Midsummer Nights Dream are the 1999 film directed by Michael Hoffman and the issue by NeilRead MoreA Midsummer Nights Dream Essay1790 Words   |  8 Pagesâ€Å"A Midsummer Night’s Dream† Essay â€Å"A Midsummer Night’s Dream†, one of Shakespeare’s most beloved comedies, is generally thought of as a comical romance. A very important factor that makes the whole play a comedy, is magic, which is used to affect the lives of four Athenians: Hermia, Lysander, Helena and Demetrius. Bottom, also a simple human, falls victim of the fairies’ mischievous magic. The magic reaches these characters by Puck, a naughty fairy, and Oberon, the king of fairies. Puck decidesRead MoreHow Two Shakespearean Couples Resolve Conflict in Their Relationships in A Midsummer Nights Dream and As You Like It1374 Words   |  6 PagesHow Two Shakespearean Couples Resolve Conflict in Their Relationships in A Midsummer Nights Dream and As You Like It In Shakespeares comedies, A Midsummer Nights Dream and As You Like It, the playwright deals with love, relationships, and how couples come to terms with their problems and resolve the conflicts within themselves and with those around them. Both of the plays point out that when individuals look within themselves and face the issues that are keeping them apart from the one they

Definition and Examples of Epideictic Rhetoric

Epideictic  rhetoric (or epideictic oratory) is ceremonial discourse:  speech or writing that praises or blames (someone or something). According to Aristotle, epideictic  rhetoric (or epideictic oratory) is one of the three major branches of rhetoric. Also known as  demonstrative rhetoric  and ceremonial discourse, epideictic rhetoric includes funeral orations, obituaries, graduation and retirement speeches, letters of recommendation, and nominating speeches at political conventions. Interpreted more broadly, epideictic rhetoric may also include works of literature. In his recent study of epideictic rhetoric (Epideictic Rhetoric: Questioning the Stakes of Ancient Praise, 2015),  Laurent Pernot notes that since the time of Aristotle, epideictic has been a loose term: The field of epideictic rhetoric seems vague and laden with poorly resolved ambiguities. EtymologyFrom the Greek, fit for displaying or showing off Pronunciation:  eh-pi-DIKE-tick Examples of Epideictic Rhetoric Daniel Webster in Praise of John Adams and Thomas Jefferson:Adams and Jefferson, I have said, are no more. As human beings, indeed, they are no more. They are no more, as in 1776, bold and fearless advocates of independence; no more, as at subsequent periods, the head of the government; nor more, as we have recently seen them, aged and venerable objects of admiration and regard. They are no more. They are dead. But how little is there of the great and good which can die! To their country they yet live, and live for ever. They live in all that perpetuates the remembrance of men on earth; in the recorded proofs of their own great actions, in the offspring of their intellect, in the deep-engraved lines of public gratitude, and in the respect and homage of mankind. They live in their example; and they live, emphatically, and will live, in the influence which their lives and efforts, their principles and opinions, now exercise, and will continue to exercise, on the affairs of men, not onl y in their own country but throughout the civilized world.(Daniel Webster, On the Deaths of John Adams and Thomas Jefferson, 1826) Oprah Winfreys Eulogy for Rosa Parks:And Im here today to say a final thank you, Sister Rosa, for being a great woman who used your life to serve, to serve us all. That day that you refused to give up your seat on the bus, you, Sister Rosa, changed the trajectory of my life and the lives of so many other people in the world.I would not be standing here today nor standing where I stand every day had she not chosen to sit down. . . . Had she not chosen to say we shall not—we shall not be moved.(Oprah Winfrey, Eulogy for Rosa Parks, October 31, 2005) Observations on Epideictic Rhetoric Persuasion and Epideictic Rhetoric:Rhetorical theory, the study of the art of persuasion, has long had to recognize that there are many literary and rhetorical texts where rhetoric does not aim directly at persuasion, and their analysis has long been problematical. To categorize speeches aimed at praise and blame rather than at decision-making, speeches such as funeral orations and encomia or panegyrics, Aristotle devised the technical term epideictic. It can readily be extended to take in literary and theoretical texts insofar as they also do not aim directly at persuasion.(Richard Lockwood, The Readers Figure: Epideictic Rhetoric in Plato, Aristotle, Bossuet, Racine and Pascal. Libraire Droz, 1996) Aristotle on Epideictic (Ceremonial) Rhetoric:The ceremonial orator is, properly speaking, concerned with the present, since all men praise or blame in view of the state of things existing at the time, though they often find it useful also to recall the past and to make guesses at the future.(Aristotle, Rhetoric) Cicero on Epideictic Orations:[Epideictic orations are] produced as show-pieces, as it were, for the pleasure they will give, a class comprising eulogies, descriptions, and histories, exhortations like the Panegyric of Isocrates, and similar orations by many of the Sophists . . . and all other speeches unconnected with battles of public life. . . . [The epideictic style] indulges in a neatness and symmetry of sentences, and is allowed to use well-defined and rounded periods; the ornamentation is done of set purpose, with no attempt at concealment, but openly and avowedly . . ..The epideictic oration, then, has a sweet, fluent and copious style, with bright conceits and sounding phrases. It is the proper field for sophists, as we said, and is fitter for the parade than for the battle . . ..(Cicero, Orator, trans. by H.M. Hubbell) Aims of Epideictic Rhetoric:If we speak in praise . . . if they do not know him, we shall try to make them [the audience] desire to know a man of such excellence since the hearers of our eulogy have the same zeal for virtue as the subject of the eulogy had or now has, we hope easily to win the approval of his deeds from those whose approval we desire. The opposite, if it is censure: . . . we shall try to make them know him, in order that they may avoid his wickedness; since our hearers are unlike the subject of our censure, we express the hope that they will vigorously disapprove his way of life.(Rhetorica ad Herennium, 90s BC) President Obamas Epideictic Rhetoric:Kathleen Hall Jamieson, the director of the Annenberg Public Policy Center at the University of Pennsylvania, noted that there were many forms of political discourse. . . . She said Mr. [Barack] Obama excels at speeches read from a teleprompter to a mass audience, not necessarily at the other forms. And his best speeches, she said, were examples of epideictic or ceremonial rhetoric, the kind we associate with conventions or funerals or important occasions, as opposed to the deliberative language of policymaking or the forensic language of argument and debate.They don’t necessarily translate to, say, selling major legislation, a skill mastered, for example, by Lyndon B. Johnson, hardly a compelling orator.It’s not a kind of speech that’s a valuable predictor of one’s capacity to govern, she said. I don’t mean to say it doesn’t forecast something. It does. But presidents have to do a lot more than that.(Pete r Applebome, Is Eloquence Overrated? The New York Times, January  13, 2008)

Water Level Warning by Gsm Free Essays

CHAPTER 1 INTRODUCTION Our entire project is based upon Embedded Systems. In this project we are using Microcontroller which controls all the operations in regarding the level of water in the dam. For this process we require the components such as microcontroller, GSM modem, control circuitry, power supply and three sensors. We will write a custom essay sample on Water Level Warning by Gsm or any similar topic only for you Order Now These three sensors are placed in three different threshold levels and are connected to the controller. If for suppose the level of water is being increasing in the dam, then immediately when the water level crossed the sensor at level-1, the information is passed to the controller and then the controller checks for the precaution instruction which is given a by the developer and forwards it to the GSM modem. The modem immediately sends that particular SMS to the mobiles for which it is assigned saying that â€Å"the Water level has crossed the threshold level-1†. The controlling part of the water level is also done by the controller through the instructions given by the developer. This includes the operations such as the number of gates to be opened, the number of threshold levels that are crossed. In this process the controller checks the number of threshold levels that are crossed and according to that the gates are being controlled. 1. 1 Embedded System Embedded systems are electronic devices that incorporate microprocessors with in their implementations. Embedded systems designers usually have a significant grasp of hardware technologies. They use specific programming languages and software to develop embedded systems and manipulate the equipment. Embedded systems often use a (relatively) slow processor and small memory size to minimize costs. An embedded system is a special-purpose system in which the computer is completely encapsulated by or dedicated to the device or system it controls. Unlike a general-purpose computer, such as a personal computer, an embedded system performs one or a few pre-defined tasks, usually with very specific requirements. Since the system is dedicated to specific tasks, design engineers can optimize it, reducing the size and cost of the product. Embedded systems are often mass-produced, benefiting from economies of scale. . 2 GSM Technology Global System for Mobile Communication (GSM) is a set of ETSI standards specifying the infrastructure for a digital cellular service. GSM (Global System for Mobile communication) is a digital mobile telephone system that is widely used in many parts of the world. GSM uses a variation of Time Division Multiple Access (TDMA) and is the most widely used of the thr ee digital wireless telephone technologies (TDMA, GSM, and CDMA). GSM digitizes and compresses data, then sends it down a channel with two other streams of user data, each in its own time slot. GSM operates in the 900MHz, 1800MHz, or 1900 MHz frequency bands. GSM (Global System for Mobile communications) is the technology that underpins most of the world’s mobile phone networks. The GSM platform is a hugely successful wireless technology and an unprecedented story of global achievement and cooperation. GSM has become the world’s fastest growing communications technology of all time and the leading global mobile standard, spanning 218 countries. GSM is an open, digital cellular technology used for transmitting mobile voice and data services. GSM operates in the 900MHz and 1. GHz bands GSM supports data transfer speeds of up to 9. 6 kbps, allowing the transmission of basic data services such as SMS. Everyday, millions of people are making phone calls by pressing a few buttons. Little is known about how one person’s voice reaches the other person’s phone that is thousands of miles away. Even less is known about the security measures and protection b ehind the system. The complexity of the cell phone is increasing as people begin sending text messages and digital pictures to their friends and family. The cell phone is slowly turning into a handheld computer. All the features and advancements in cell phone technology require a backbone to support it. When a mobile subscriber roams into a new location area (new VLR), the VLR automatically determines that it must update the HLR with the new location information, which it does using an SS7 Location Update Request Message. The Location Update Message is routed to the HLR through the SS7 network, based on the global title translation of the IMSI that is stored within the SCCP Called Party Address portion of the message. The HLR responds with a message that informs the VLR whether the subscriber should be provided service in the new location. . 3 Micro controller Microcontrollers as the name suggests are small controllers. They are like single chip computers that are often embedded into other systems to function as processing/controlling unit. Microcontroller – A single chip used to control other devices. Any microcomputer system requires memory to store a sequence of instructions making up a program, parallel port or serial port for communicating with an external system, timer / counter for control purposes like generating time delays, Baud rate for the serial port, apart from the controlling unit called the Central Processing Unit. CHAPTER 2 DESCRIPTION OF PROJECT 2. 1 Block diagram and description [pic] Fig 2. 1 Block Diagram of dam level warning using GSM SMS In this block diagram we are using microcontroller, GSM modem, LCD, power supply, MAX-232, control circuitry, liquid level indicator. These all are mentioned below. Description The main aim is to send SMS when ever the water level crosses the threshold level. And necessary precautions are taken when ever the water exceeds the last level. To send an SMS to the concerned person we have certain steps to follow. In-order to work with any components basic requirement is power supply. Now the aim is to design the power supply section which converts 230V AC in to 5V DC. Since 230V AC is too high to reduce it to directly 5V DC, therefore we need a step-down transformer that reduces the line voltage to certain voltage that will help us to convert it in to a 5V DC. There are many types of power supply. Most are designed to convert high voltage AC mains electricity to a suitable low voltage supply for electronics circuits and other devices. A power supply can by broken down into a series of blocks, each of which performs a particular function. This power supply is connected to the micro controller. In a very simplistic form, a micro-controller system can be viewed as a system that reads from (monitors) inputs, performs processing and writes to (controls) outputs. Micro controllers are useful to the extent that they communicate with other devices, such as sensors, motors, switches, keypads, displays, memory and even other micro-controllers. Next input should be given to the microcontroller it is done by the level indicator. Level indicator has certain levels when the water touches the different levels of level indicator the micro controller takes the input as the level indicator is connected to the ports. This information is displayed on the LCD. When the LCD is ON the GSM (Global System for Mobile communication) gets activated by sending some commands to the microcontroller. For communication with the micro controller MAX 232 is used. This is used to convert the voltage level that is required for GSM, then the SMS is passed to the person or concerned authority using the GSM. For controlling the system we are using motors. Motors act as relays, which is an ON OFF switch. Through this relay action the motors work and controlling of the gates can be done. Hardware components 1. Power supply 2. micro controller 3. level indicator 4. MAX 232 5. GSM(Global system for Mobile communication) Modem 6. LCD(liquid crystal display) 7. control system 2. 2 Power supply The power supplies are designed to convert high voltage AC mains electricity to a suitable low voltage supply for electronics circuits and other devices. A power supply can by broken down into a series of blocks, each of which performs a particular function. A d. c power supply which maintains the output voltage constant irrespective of a. c mains fluctuations or load variations is known as â€Å"Regulated D. C Power Supply†. For example a 5V regulated power supply system as shown below: [pic] Fig 2. 2 5V regulated power supply system The regulated DC output is very smooth with no ripple. It is suitable for all electronic circuits. 2. 2. 1 Transformer Transformers convert AC electricity from one voltage to another with little loss of power. Transformers work only with AC and this is one of the reasons why mains electricity is AC. Step-up transformers increase voltage, step-down transformers reduce voltage. Most power supplies use a step-down transformer to reduce the dangerously high mains voltage (230V in UK) to a safer low voltage. Transformers waste very little power so the power out is (almost) equal to the power in. Note that as voltage is stepped down current is stepped up. 2. 2. 2 Rectifier A circuit which is used to convert a. c to dc is known as â€Å"rectifier†. The process of conversion a. c to d. is called â€Å"rectification† Types of rectifier: †¢ Half wave Rectifier †¢ Full wave rectifier 1. Centre tap full wave rectifier. 2. Bridge type full bridge rectifier. Bridge Rectifier: A bridge rectifier makes use of four diodes in a bridge arrangement to achieve full-wave rectification. This is a widely used configuration, both with individual diodes wired as shown and with single compone nt bridges where the diode bridge is wired internally. A bridge rectifier makes use of four diodes in a bridge arrangement as shown in fig below to achieve full-wave rectification. This is a widely used configuration, both with individual diodes wired as shown and with single component bridges where the diode bridge is wired internally. [pic] Fig 2. 2. 2 Bridge Rectifier arrangement 2. 2. 3 Filter A Filter is a device which removes the a. c component of rectifier output but allows the d. c component to reach the load. We have seen that the ripple content in the rectified output of half wave rectifier is 121% or that of full-wave or bridge rectifier or bridge rectifier is 48% such high percentages of ripples is not acceptable for most of the applications. Ripples can be removed by one of the following methods of filtering. †¢ A capacitor, in parallel to the load, provides an easier by –pass for the ripples voltage though it due to low impedance. At ripple frequency and leave the d. c. to appears the load. †¢ An inductor, in series with the load, prevents the passage of the ripple current (due to high impedance at ripple frequency) while allowing the d. c (due to low resistance to d. c) 2. 2. 4 Regulator Voltage regulator ICs is available with fixed (typically 5, 12 and 15V) or variable output voltages. The maximum current they can pass also rates them. Negative voltage regulators are available, mainly for use in dual supplies. Most regulators include some automatic protection from excessive current (‘overload protection’) and overheating (‘thermal protection’). Many of the fixed voltage regulator ICs has 3 leads and look like power transistors, such as the 7805 +5V 1A regulator shown on the right. The LM7805 is simple to use. You simply connect the positive lead of your unregulated DC power supply (anything from 9VDC to 24VDC) to the Input pin, connect the negative lead to the Common pin and then when you turn on the power, you get a 5 volt supply from the output pin. Regulator eliminates ripple by setting DC output to a fixed voltage. [pic] Fig 2. 2. 4 Regulator 2. 3 Micro controller (AT89C51) In this project work we are using AT89C51 micro-controller. This micro-controller plays a major role. Micro-controllers were originally used as components in complicated process-control systems. However, because of their small size and low price, Micro-controllers are now also being used in regulators for individual control loops. In several areas Micro-controllers are now outperforming their analog counterparts and are cheaper as well. A Micro controller consists of a powerful CPU tightly coupled with memory RAM, ROM or EPROM), various I / O features such as Serial ports, Parallel Ports, Timer/Counters, Interrupt Controller, Data Acquisition interfaces-Analog to Digital Converter (ADC), Digital to Analog Converter (ADC), everything integrated onto a single Silicon Chip. It does not mean that any micro controller should have all the above said features on chip, Depending on the need and area of application for which it is designed, The ON-CHIP features present in it may or may not include all the individual section said above. Any microcomputer system requires memory to store a sequence of instructions making up a program, parallel port or serial port for communicating with an external system, timer / counter for control purposes like generating time delays, Baud rate for the serial port, apart from the controlling unit called the Central Processing Unit 2. 3. 1 Features 1. 8 Bit CPU optimized for control applications 2. Extensive Boolean processing (Single – bit Logic) Capabilities. 3. On – Chip Flash Program Memory 4. On – Chip Data RAM 5. Bi-directional and Individually Addressable I/O Lines 6. Multiple 16-Bit Timer/Counters . Full Duplex UART 8. Multiple Source / Vector / Priority Interrupt Structure 9. On – Chip Oscillator and Clock circuitry. 10. On – Chip EEPROM 11. One Serial communication port 2. 3. 2 Block diagram of 89C51 Fig 2. 3. 2 Block diagram of microcontroller 89C51 SERIES: 89C51 Family, TECHNOLOGY: CMOS This microcontroller had 128 bytes of RAM,4K bytes of on-chip ROM, two timers, one serial port and 4 ports(each 8-bits wide)all on single chip. At that time it was also referred to as a â€Å"system on a chip†. The 8051 is an 8-bit processor, meaning that the CPU can work on only 8-bits of data at time. Data larger than 8-bits has to be broken into 8-bit pieces to be processed by the CPU. The 8051 can have a maximum of 64K bytes of ROM, many manufacturers have put only 4Kbytes on chip. The P89C51 provides the following standard features: 4K bytes of Flash, 128 bytes of RAM, 32 I/O lines, two 16-bit timer/counters, five vector two-level interrupt architecture, a full duplex serial port, and on-chip oscillator and clock circuitry. In addition, the P89C51 is designed with static logic for operation down to zero frequenc and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning. The Power-down Mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset. 2. 3. 3 Memory organization Program Memory Figure below shows a map of the lower part of the program memory. After reset, the CPU begins execution from location 0000H. As shown in fig. , each interrupt is assigned a fixed location in program memory. The interrupt causes the CPU to jump to that location, where it executes the service routine. External Interrupt 0, for example, is assigned to location 0003H. If External Interrupt 0 is used, its service routine must begin at location 0003H. If the interrupt is not used, its service location is available as general purpose. Program memory addresses are always 16 bits wide, even though the actual amount o program memory used may be less than 64Kbytes. External program execution sacrifices two of the 8-bit ports, P0 and P2, to the function of addressing the program memory. [pic] Fig 2. 3. 3 Program Memory 2. 3. 4 Pin diagram of 89C51 [pic] Fig 2. 3. 4 Pin Diagram of AT89C51 2. . 5 Pin description Vcc Pin 40 provides supply voltage to the chip. The voltage source is +5v. Gnd Pin 20 is the ground. Ports 0, 1, 2 and 3 As shown in pin diagram the four ports P0, P1, P2, and P3 each use of 8 pins making the 8-bit ports. All the ports upon Reset are configured as input, since P0-P3 have FFH on them. Port 0 Port 0 occupies a total of 8 pins (pins 32-33). It can be used for input or ou tput. Port0 is also designated as AD0-AD7, allowing it to be used for both address and data. When connecting an 8051/31 to an external memory, port 0 provides both address and data. The 8051 multiplexes address and data through port 0 to save pins. ALE=0, it provides data D0-D7, but when ALE=1, it has address A0-A7. Therefore, ALE is used for demultiplexing address address and data with the help of a 74LS373 latch. In the 8051-based systems where there is no external memory connection, the pins of P0 must be connected externally to a 10k –ohm pull-up resistor. This is due to the fact that P0 is an Open drain, Unlike P1, P2, P3. Open drain is a term used for Mos chips in the same way that open collector is used for TTL chips. In many systems using the 8751, 89C51, or DS89C4x0 chips, we normally connect P0 to pull-up resistors. With external pull-up resistors connected to P0, it can be used as a simple I/O port, just like P1 and P2. In contrast to Port 0, ports p1, p2, and p3 do not need any pull-up resistors since they already have pull-up resistors internally. Upon reset, ports p1, p2, ad p3 are configured as input ports. Port 1 Port 1 occupies a total of 8-pins (pins1-8). It can be used as input or output. In contrast to port 0, this port does not need any pull-up resistors since it already has pull-up resistors internally. Upon reset, port1 is configured as an input port. Port 2 Port 2 occupies a total 8 pins (pins 21-28). It can be used as input or output. However, in 8031-based systems, port2 is also designatedas A8-A15, indicating its dual function. Since an 8051/31 is capable of accessing 64K bytes of external memory, it needs a path for the 16 bits of the address. While P0 provides the lower 8 bits via A0-A7, it is the job of p2 is used for the upper 8 bits of the 16-bit address, and it cannot be used for I/O. Just like P1, port 2 does not need any pull-up resistors since it already has pull-up resistors internally. Upon reset, port2 is configured as an input port. Port 3 Port 3 occupies a total of 8 pins (pins 10-17). It can be used as input or output. P3 does not need any pull-up resistors, just as P1 and P2 did not. Although Port 3 is configured as an input port upon reset, this is not the way it is most commonly used. Port 3 has the additional function of providing some extremely important signals such as interrupts. The below table provides these alternate functions of P3. This is information applies to both 8051 and 8031 chips. Port 3 also receives some control signals for Flash programming and verification. RST Reset input. A high on this pin for two machine cycles while the oscillator is running resets the device. ALE/PROG Prior to each reading from external memory, the microcontroller will set the lower address byte (A0-A7) on P0 and immediately after that activates the output ALE. Upon receiving signal from the ALE pin, the external register (74HCT373 or 74HCT375 circuit is usually embedded) memorizes the state of P0 and uses it as an address for memory chip. In the second part of the microcontroller’s machine cycle, a signal on this pin stops being emitted and P0 is used now for data transmission (Data Bus). In his way, by means of only one additional (and cheap) integrated circuit, data multiplexing from the port is performed. This port at the same time used for data and address transmission. PSEN Program Store Enable is the read strobe to external program memory. When the AT89C51 is executing code from external program memory, PSEN is activated twice each machine cycle, except that two PSEN activations are skipped during each access to external data memory. EA/VPP External Access Enable (EA). EA must be strapped to GND in order to enable the device to fetch code from external program memory locations starting at 0000H up to FFFFH. Note, however, that if lock bit 1 is programmed, EA will be internally latched on reset. EA should be strapped to VCC for internal program executions. This pin also receives the 12-volt programming enable voltage (VPP) during Flash programming, for parts that require 12-volt VPP. XTAL1 and XTAL2 The 8051 has an on-chip oscillator but requires an external clock to run it. Most often a quartz crystal oscillator is connected to inputs XTAL1 (pin19) and XTAL2 (pin18). The quartz crystal oscillator connected to XTAL1 and XTAL2 also needs two capacitors of 30pf value. One side of each capacitor is connected to the ground. It must be noted that there are various speeds of the 8051 family. Speed refers to the maximum oscillator frequency connected to XTAL. For example, a 12-MHz chip must be connected to a crystal with 12 MHz frequency of no more than 20 MHz. When the 8051 is connected to a crystal oscillator and is powered up, we can observe the frequency on the XTAL2 pin using the oscilloscope. 2. 3. 6 Timers On-chip timing/counting facility has proved the capabilities of the microcontroller for implementing the real time application. These includes pulse counting, frequency measurement, pulse width measurement, baud rate eneration, etc,. Having sufficient number of timer/counters may be a need in a certain design application. The 8051 has two timers/counters. They can be used either as timers to generate a time delay or as counters to count events happening outside the microcontroller. Let discuss how these timers are used to generate time delays and we will also discuss how they are been used as even t counters. 2. 3. 7 Polling In polling the microcontroller continuously monitors the status of a given device; when the status condition is met, it performs the service . After that, it moves on to monitor the next device until each one is serviced. Although polling can monitor the status of several devices and serve each of them as certain condition are met. 2. 3. 8 Interrupts In the interrupts method, whenever any device needs its service, the device notifies the microcontroller by sending it an interrupts signal. Upon receiving an interrupt signal, the microcontroller interrupts whatever it is doing and serves the device. The program associated with the interrupts is called the interrupt service routine (ISR). or interrupt handler. Six Interrupts in the 8051: 1. In reality, only five interrupts are available to the user in the 8051, but many manufacturers’ data sheets state that there are six interrupts since they include reset . the six interrupts in the 8051 are allocated as above. 2. Reset. When the reset pin is activated, the 8051 jumps to address location 0000. this is the power-up reset. 3. Two interrupts are set aside for the timers: one for Timer 0 and one for Timer 1. Memory location 000BH and 001BH in the interrupt vector table belong to Timer 0 and Timer 1, respectively. 4. Two interrupts are set aside for hardware external harder interrupts. Pin number 5. 12(P3. 2) and 13(P3. 3) in port 3 are for the external hardware interrupts INT0 and INT1,respectively. These external interrupts are also referred to as EX1 and EX2. Memory location 0003H and 0013H in the interrupt vector table are assigned to INT0 and INT1, respectively. 6. Serial communication has a single interrupt that belongs to both receive and transmit. The interrupt vector table location 0023H belongs to this interrupt. 2. 3. 9 Registers In the CPU, registers are used to store information temporarily. That information could be a byte of data to be processed, or an address pointing to the data to be fetched. The vast majority of 8051 registers are 8–bit registers. In the 8051 there is only one data type: 8bits. The 8bits of a register are should in the diagram from the MSB (most significant bit) D7 to the LSB (least significant bit) D0. With an 8-bit data type, any data larger than 8bits must be broken into 8-bit chunks before it is processed. Since there are a large number of registers in the 8051, we will concentrate on some of the widely used general-purpose registers. D7 |D6 |D5 |D4 |D3 |D2 |D1 |D0 | The most widely used registers of the 8051 are A(accumulator), B, R0, R1, R2, R3, R4, R5, R6, R7, DPTR(data pointer), and PC(program counter). All of the above registers are 8-bits, except DPTR and the program counter. The accumulator, register A, is used for all arithmetic and logic instructions. 2. 3. 10 Serial communication Computers can transfer data in two ways: paralle l and serial. In parallel data transfers, often 8 or more lines (wire conductors) are used to transfer data to a device that is only a few feet away. Examples of parallel transfers are printers and hard disks; each uses cables with many wire strips. Although in such cases a lot of data can be transferred in a short amount of time by using many wires in parallel, the distance cannot be great. To transfer to a device located many meters away, the serial method is used. In serial communication, the data is sent one bit at a time, in contrast to parallel communication, in which the data is sent a byte or more at a time. Serial communication of the 8051 is the topic of this chapter. The 8051 has serial communication capability built into it, there by making possible fast data transfer using only a few wires. Serial data communication uses two methods, asynchronous and synchronous. The synchronous method transfers a block of data at a time, while the asynchronous method transfers a single byte at a time. The 8051 transfers and receives data serially at many different baud rates. The baud rate in the 8051 is programmable. This is done with the help of Timer1. The 8051 divides the crystal frequency by 12 to get the machine cycle frequency. The 8051’s serial communication UART circuitry divides the machine cycle frequency of 921. 6 kHz divided by 32 once more before it is used by Timer 1 to set the Baud rate. SBUF register SBUF is an 8-bit register used solely for serial communication in the 8051. For a byte of data to be transferred via the TXD line, it must be placed in the SBUF register. Similarly, SBUF holds the byte of data when it is received by the 8051’s RXD line. SBUF can be accessed like any other register in the 8051. The moment a byte is written into SBUF, it is framed with the start and stop bits and transferred serially via the TXD pin. Similarly, when the bits are received serially via RXD, the 8051 defames it by eliminating the stop and start bits, making a byte out of the data received, and then placing it in the SBUF. SCON (serial control) register The SCON register is an 8-bit register used to program the start bit, stop bit, and data bits of data framing, among other things. Transmit In mode0 the data transmission in form of pulse train automatically starts on the pin RXD at the moment the data has been written to the SBUF register. In fact, this process starts after any instruction being performed on this register. Upon all 8 bits have been sent, the bit TI in the SCON register is automatically set. In mode1 a sequence for data transmission via serial communication is automatically started upon the data has been written to the SBUF register. End of 1 byte transmission is indicated by setting the TI bit in the SCON register. In mode2 TI (transmit interrupt) is bit D1 of the SCON register. This is an extremely important flag bit in the SCON register. When the 8051 finishes the transfer of the 8-bit character, it raises the TI flag to indicate that it is ready to transfer another byte. The TI bit is raised at the beginning of the stop bit. Receive In mode0 data receiving starts through the pin RXD once two necessary conditions are met: bit REN=1 and RI=0 (both bits reside in the SCON register). Upon 8 bits have been received, the bit RI (register SCON) is automatically set, which indicates that one byte is received. In mode1 data receiving starts as soon as the START bit (logic zero (0)) appears on the pin RXD. The condition is that bit REN=1and bit RI=0. Both of them are stored in the SCON register. The RI bit is automatically set upon receiving has been completed. In mode2 RI (receive interrupt) is the D0 of the SCON register. This is another extremely important flag bit in the SCON register. When the 8051 receives data serially via RXD, it gets rid of the start and stop bits and places the byte in the SBUF register. Then it raises the RI flag bit to indicate that a byte has been received and should be picked up before it is lost. RI is raised halfway through the stop bit. 2. 4 Level Indicator Level indicator is used to indicate the different water levels in the dams. Liquid level indicator is used to indicate the water present at what level. Here we are considering three level Low level . Medium level and High level, as the liquid level increases a message is sent to the concern person regard level of water. The main purpose of this level indicator is it checks the water level and gives the input information to micro controller. 2. 5 MAX 232 The MAX232 from Maxim was the first IC which in one package contains the necessary drivers (two) and receivers (also two), to adapt the RS-232 signal voltage levels to TTL logic. It became popular, because it just needs one voltage (+5V) and generates the necessary RS-232 voltage levels (approx. 10V and +10V) internally. This greatly simplified the design of circuitry. Circuitry designers no longer need to design and build a power supply with three voltages (e. g. -12V, +5V, and +12V), but could just provide one +5V power supply, e. g. with the help of a simple 78Ãâ€"05 voltage converter. The MAX232 has a successor, the MAX232A. The ICs are almost identical, however, the MAX232A is much more often used (and easier to get) than the original MAX232, and the MAX232A only needs external capacitors 1/10th the capacity of what the original MAX232 needs. It should be noted that the MAX 232(A) is just a driver/receiver. It does not generate the necessary RS-232 sequence of marks and spaces with the right timing, it does not decode the RS-232 signal, and it does not provide a serial/parallel conversion. â€Å"All it does is to convert signal voltage levels†. The MAX 232(A) has two receivers (converts from RS-232 to TTL voltage levels) and two drivers (converts from TTL logic to RS-232 voltage levels). This means only two of the RS-232 signals can be converted in each direction. The old MC1488/1498 combo provided four drivers and receivers. The MAX232 is a dual driver/receiver that includes a capacitive voltage generator to supply EIA-232 voltage levels from a single 5-V supply. Each receiver converts EIA-232 inputs to 5-V TTL/CMOS levels. These receivers have a typical threshold of 1. 3 V and a typical hysteresis of 0. 5 V, and can accept  ±30-V inputs. Each driver converts TTL/CMOS input levels into EIA-232 levels. The RS232 standard is not TTL compatible; therefore, it requires a line driver such as the MAX232 chip to convert RS232 voltage levels to TTL levels, and vice versa. The interfacing of 8051 with RS232 connectors via the MAX232 chip is the main topic. The 8051 has two pins that are used specifically for transferring and receiving data serially. These two pins are called TXD and RXD and a part of the port 3 group (P3. 0 and P3. 1). Pin 11 of the 8051 is assigned to TXD and pin 10 is designated as RXD. These pins are TTL compatible; therefore, they require a line driver to make them RS232 compatible. One such line driver is the MAX232 chip. [pic] Fig 2. 5 8051 connection to RS232 MAX232 converts from RS232 voltage levels to TTL voltage levels, and vice versa. One advantage of the MAX232 chip is that it uses a +5V power source which, is the same as the source voltage for the 8051. In the other words, with a single +5V power supply we can power both the 8051 and MAX232, with no need for the power supplies that are common in many older systems. The MAX232 has two sets of line drivers for transferring and receiving data. The line drivers used for TXD are called T1 and T2, while the line drivers for RXD are designated as R1 and R2. In many applications only one of each is used. 2. 6 GSM (Global system for mobile communication) Modem A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. A GSM modem is a specialized type of modem which accepts a SIM card, and operates over a subscription to a mobile operator, just like a mobile phone. From the mobile operator perspective, a GSM modem looks just like a mobile phone. A GSM modem can be an external modem device, such as the Wavecom FASTRACK Modem. Insert a GSM SIM card into this modem, and connect the modem to an available serial port on your computer. A GSM modem can be a PC Card installed in a notebook computer, such as the Nokia Card Phone. A GSM modem could also be a standard GSM mobile phone with the appropriate cable and software driver to connect to a serial port on your computer. Phones such as the Nokia 7110 with a DLR-3 cable, or various Ericsson phones, are often used for this purpose. A dedicated GSM modem (external or PC Card) is usually preferable to a GSM mobile phone. This is because of some compatibility issues that can exist with mobile phones. For example, if you wish to be able to receive inbound MMS messages with your gateway, and you are using a mobile phone as your modem, you must utilize a mobile phone that does not support WAP push or MMS. This is because the mobile phone automatically processes these messages, without forwarding them via the modem interface. Similarly some mobile phones will not allow you to correctly receive SMS text messages longer than 160 bytes (known as â€Å"concatenated SMS† or â€Å"long SMS†). This is because these long messages are actually sent as separate SMS messages, and the phone attempts to reassemble the message before forwarding via the modem interface. (We’ve observed this latter problem utilizing the Ericsson R380, while it does not appear to be a problem with many other Ericsson models. ) When you install your GSM modem, or connect your GSM mobile phone to the computer, be sure to install the appropriate Windows modem driver from the device manufacturer. To simplify configuration, the Now SMS/MMS Gateway will communicate with the device via this driver. An additional benefit of utilizing this driver is that you can use Windows diagnostics to ensure that the modem is communicating properly with the computer. The Now SMS/MMS gateway can simultaneously support multiple modems, provided that your computer hardware has the available communications port resources. 2. 6. 1 Architecture of GSM network A GSM network is composed of several functional entities, whose functions and interfaces are specified. Figure 1 shows the layout of a generic GSM network. The GSM network can be divided into three broad parts. The Mobile Station is carried by the subscriber. The Base Station Subsystem controls the radio link with the Mobile Station. The Network Subsystem, the main part of which is the Mobile services Switching Center (MSC), performs the switching of calls between the mobile users, and between mobile and fixed network users. The MSC also handles the mobility management operations. Not shown are the Operations A GSM network is composed of several functional entities, whose functions and interfaces are specified. Figure shows the layout of a generic GSM network. The GSM network can be divided into three broad parts. Subscriber carries the Mobile Station. The Base Station Subsystem controls the radio link with the Mobile Station. The Network Subsystem, the main part of which is the Mobile services Switching Center (MSC), performs the switching of calls between the mobile users, and between mobile and fixed network users. The MSC also handles the mobility management operations. Not shown is the Operations intendance Center, which oversees the proper operation and setup of the network. The Mobile Station and the Base Station Subsystem communicate across the Um interface, also known as the air interface or radio link. The Base Station Subsystem communicates with the Mobile services Switching Center across the A interface. [pic] Fig 2. 6. 1 General architecture of a GSM network Mobile Station: The mobile station (MS) consists of the mobile equipment (the terminal) and a smart card called the Subscriber Identity Module (SIM). The SIM provides personal mobility, so that the user can have access to subscribed services irrespective of a specific terminal. By inserting the SIM card into another GSM terminal, the user is able to receive calls at that terminal, make calls from that terminal, and receive other subscribed services. The mobile equipment is uniquely identified by the International Mobile Equipment Identity (IMEI). The SIM card contains the International Mobile Subscriber Identity (IMSI) used to identify the subscriber to the system, a secret key for authentication, and other information. The IMEI and the IMSI are independent, thereby allowing personal mobility. The SIM card may be protected against unauthorized use by a password or personal identity number. Base Station Subsystem: The Base Station Subsystem is composed of two parts, the Base Transceiver Station (BTS) and the Base Station Controller (BSC). These communicate across the standardized Abis interface, allowing (as in the rest of the system) operation between components made by different suppliers. The Base Transceiver Station houses the radio transceivers that define a cell and handles the radio-link protocols with the Mobile Station. In a large urban area, there will potentially be a large number of BTSs deployed, thus the requirements for a BTS are ruggedness, reliability, portability, and minimum cost. The Base Station Controller manages the radio resources for one or more BTSs. It handles radio-channel setup, frequency hopping, and handovers, as described below. The BSC is the connection between the mobile station and the Mobile service Switching Center (MSC). Network Subsystem The central component of the Network Subsystem is the Mobile services Switching Center (MSC). It acts like a normal switching node of the PSTN or ISDN, and additionally provides all the functionality needed to handle a mobile subscriber, such as registration, authentication, location updating, handovers, and call routing to a roaming subscriber. These services are provided in conjunction with several functional entities, which together form the Network Subsystem. The MSC provides the connection to the fixed networks (such as the PSTN or ISDN). Signalling between functional entities in the Network Subsystem uses Signalling System Number 7 (SS7), used for trunk signalling in ISDN and widely used in current public networks. The Home Location Register (HLR) and Visitor Location Register (VLR), together with the MSC, provide the call-routing and roaming capabilities of GSM. The HLR contains all the administrative information of each subscriber registered in the corresponding GSM network, along with the current location of the mobile. The location of the mobile is typically in the form of the signaling address of the VLR associated with the mobile as a distributed database station. The actual routing procedure will be described later. There is logically one HLR per GSM network, although it may be implemented The Visitor Location Register (VLR) contains selected administrative information from the HLR, necessary for call control and provision of the subscribed services, for each mobile currently located in the geographical area controlled by the VLR. Although each functional entity can be implemented as an independent unit, all manufacturers of switching equipment to date implement the VLR together with the MSC, so that the geographical area controlled by the MSC corresponds to that controlled by the VLR, thus simplifying the signalling required. Note that the MSC contains no information about particular mobile stations — this information is stored in the location registers. The other two registers are used for authentication and security purposes. The Equipment Identity Register (EIR) is a database that contains a list of all valid mobile equipment on the network, where each mobile station is identified by its International Mobile Equipment Identity (IMEI). An IMEI is marked as invalid if it has been reported stolen or is not type approved. The Authentication Center (AuC) is a protected database that stores a copy of the secret key stored in each subscriber’s SIM card, which is used for authentication and encryption over the radio channel. 2. 6. 2 Smart modem(GSM/GPRS) Analogic’s GSM Smart Modem is a multi-functional, ready to use, rugged and versatile modem that can be embedded or plugged into any application. The Smart Modem can be customized to various applications by using the standard AT commands. The modem is fully type-approved and can directly be integrated into your projects with any or all the features of Voice, Data, Fax, SMS, and Internet etc. Smart Modem kit contains the following items: 1. Analogic’s GSM/GPRS Smart Modem 2. SMPS based power supply adapter. 3. 3 dBi antenna with cable (optional: other types) 4. Data cable (RS232) 5. User Manual Temperature Range: Operating temperature: from -200C to +550C Storage temperature: from -250C to +700C Installing the modem: To install the modem, plug the device on to the supplied SMPS Adapter. For Automotive applications fix the modem permanently using the mounting slots (optional as per your requirement dimensions). Inserting/ Removing the SIM Card: To insert or Remove the SIM Card, it is necessary to press the SIM holder ejector button with Sharp edged object like a pen or a needle. With this, the SIM holder comes out a little, then pulls it out and insert or remove the SIM Card [pic] Fig 2. 6. 2 Inserting/Removing the sim card into the modem Make sure that the ejector is pushed out completely before accessing the SIM Card holder do not remove the SIM card holder by force or tamper it (it may permanently damage). Place the SIM Card Properly as per the direction of the installation. It is very important that the SIM is placed in the right direction for its proper working condition. Connecting External Antenna Connect GSM Smart Modem to the external antenna with cable end with SMA male. The Frequency of the antenna may be GSM 900/1800 MHz. The antenna may be (0 dbi, 3 dbi or short length L-type antenna) as per the field conditions and signal conditions. DC Supply Connection The Modem will automatically turn ON when connection is given to it. The following is the Power Supply Requirement: Connecting Modem to external devices: RS232 can be used to connect to the external device through the D-SUB/ USB (for USB model only) device that is provided in the modem. 2. 7 LCD (Liquid crystal display) Liquid crystal displays (LCDs) have materials, which combine the properties of both liquids and crystals. Rather than having a melting point, they have a temperature range within which the molecules are almost as mobile as they would be in a liquid, but are grouped together in an ordered form similar to a crystal. An LCD consists of two glass panels, with the liquid crystal material sand witched in between them. The inner surface of the glass plates are coated with transparent electrodes which define the character, symbols or patterns to be displayed polymeric layers are present in between the electrodes and the liquid crystal, which makes the liquid crystal molecules to maintain a defined orientation angle. When the LCD is in the off state, light rays are rotated by the two polarisers and the liquid crystal, such that the light rays come out of the LCD without any orientation, and hence the LCD appears transparent. When sufficient voltage is applied to the electrodes, the liquid crystal molecules would be aligned in a specific direction. The light rays passing through the LCD would be rotated by the polarisers, which would result in activating/ highlighting the desired characters. The LCD does don’t generate light and so light is needed to read the display. By using backlighting, reading is possible in the dark. The LCD’s have long life and a wide operating temperature range. 2. 7. 1 Pin description of LCD: [pic] VCC, VSS and VEE: While VCC and VSS provide +5V and ground respectively, VEE is used for controlling LCD contrast. The three control lines are referred to as EN, RS, and RW. EN: The EN line is called â€Å"Enable†. This control line is used to tell the LCD that you are sending it data. To send data to the LCD, your program should first set this line high (1) and then set the other two control lines and/or put data on the data bus. RS: The RS line is the â€Å"Register Select† line. When RS is low (0), the data is to be treated as a command or special instruction. When RS is high (1), the data that is sent is a text data which should be displayed on the screen. RW: The RW line is the â€Å"Read/Write† control line. When RW is low (0), the information on the data bus is being written to the LCD. When RW is high (1), the program is effectively querying (or reading) the LCD. Only one instruction (â€Å"Get LCD status†) is a read command. All others are write commands, so RW will almost be low. 2. 7. 2 LCD Interfacing Sending commands and data to LCDs with a time delay: [pic] Fig 2. 6. Interfacing of LCD to a micro controller To send any command from command list to the LCD, make pin RS=0. For data, make RS=1. Then sends a high –to-low pulse to the E pin to enable the internal latch of the LCD. 2. 8 Control System The controlling is done through the motors. Here relays acts as motors. A  relay  is an  electrically  operated  switch. Ma ny relays use an electromagnet to operate a switching mechanism, but other operating principles are also used. Relays find applications where it is necessary to control a circuit by a low-power signal, or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits, repeating the signal coming in from one circuit and re-transmitting it to another. Since relays are  switches, the terminology applied to switches is also applied to relays. A relay will switch one or more  poles, each of whose contacts can be  thrown by energizing the coil in one of three ways: 1. Normally-open (NO) contacts connect the circuit when the relay is activated; the circuit is disconnected when the relay is inactive. It is also called a  Form A contact or â€Å"make† contact. 2. Normally-closed (NC) contacts disconnect the circuit when the relay is activated; the circuit is connected when the relay is inactive. It is also called a  Form B contact or â€Å"break† contact. 3. Change-over (CO), or double-throw (DT), contacts control two circuits: one normally-open contact and one normally-closed contact with a common terminal. It is also called a  Form C  contact or â€Å"transfer† contact (â€Å"break before make†). If this type of contact utilizes â€Å"make before break† functionality, then it is called a  Form D  contact. The following designations are commonly encountered: SPST  Ã¢â‚¬â€œ Single Pole Single Throw. These have two terminals which can be connected or disconnected. Including two for the coil, such a relay has four terminals in total. It is ambiguous whether the pole is normally open or normally closed. The terminology â€Å"SPNO† and â€Å"SPNC† is sometimes used to resolve the ambiguity. SPDT  Ã¢â‚¬â€œ Single Pole Double Throw. A common terminal connects to either of two others. Including two for the coil, such a relay has five terminals in total. DPST  Ã¢â‚¬â€œ Double Pole Single Throw. These have two pairs of terminals. Equivalent to two SPST switches or relays actuated by a single coil. Including two for the coil, such a relay has six terminals in total. The poles may be Form A or Form B (or one of each). DPDT  Ã¢â‚¬â€œ Double Pole Double Throw. These have two rows of change-over terminals. Equivalent to two SPDT switches or relays actuated by a single coil. Such a relay has eight terminals, including the coil. Here in this project we are using single pole single throw. The relay has 3 pins, 1st pin is connected to the input, 2nd pin to the output and 3rd pin is connected to the ground. When input is given magnetic flux is generated and the motor starts rotating and the gate will be opened according to the development. A  motor receives power through two or more relays connected to a power source. A switch-operated logic circuit is powered by a relay power source and connects to the relays. To start the motor, the switch is pressed, causing the logic circuit to close the relays sequentially. When all the relays are closed, the motor will start. If the motor starts before the logic circuit closes all of the relays, the motor is stopped and an indication is provided that the relays that have not yet been closed have failed. Otherwise, the motor runs until the switch is pressed again, causing the logic circuit to open the relays and stop the motor. A power relay is a switch that uses an  electromagnet  to open or close a circuit. The basic design of a relay utilizes an electromagnet coil, an armature, a spring and one or more contacts. If the power relay is designed to normally be open, the circuit is not completed when in the off state. As power is applied to the power relay, generally from a battery source, the electromagnet attracts the armature, a movable arm often made of iron. The armature, which was held in place by the spring, is pulled in the direction of the coil until it reaches a contact, thus closing the circuit. If the relay is normally closed, then the coil pulls the armature away from the contact, opening the circuit. A power relay can be operated using a low amount of voltage but can also conduct a higher amount of voltage. In our project we are using a sub image able motor that is nothing but a motor. When a motor starts, the phase controller applies power to the windings so that they become magnetized with the polarity that attracts the permenant magnets on the rotor; this causes the rotor to begin rotating. As the permanent magnets on the rotor rotate past the electro-magnetic windings the phase controller reverses the polarity on the winding so that the winding repels the permanent magnets on the rotor. As the motor runs, the phase controller keeps switching windings on so that they are always attracting the permanent magnets on the rotor then repelling the permanent magnets on the rotor; this keeps it rotating. CHAPTER 3 SCHEMATIC DIAGRAM Fig 3 Schematic Diagram 3. 1 Circuit description This section gives an overview of the whole circuitry and hardware involved in the project. The required operating voltage for Microcontroller 89C51 is 5V. Hence the 5V D. C. power supply is needed by the same. This regulated 5V is generated by stepping down the voltage from 230V to 12V using step down transformer. Now the step downed a. c voltage is being rectified by the Bridge Rectifier using 1N4007 diodes. The rectified a. c voltage is now filtered using a ‘RC’ filter. Now the rectified, filtered D. C. voltage is fed to the Voltage Regulator. This voltage regulator provides/allows us to have a Regulated constant Voltage which is of +5V. The rectified; filtered and regulated voltage is again filtered for ripples using an electrolytic capacitor 100? F. Now the output from this section is fed to 40th pin of 89c51 microcontroller to supply operating voltage. The microcontroller 89C51 with Pull up resistors at Port0 and crystal oscillator of 11. 0592 MHz crystal in conjunction with couple of 30-33pf capacitors is placed at 18th 19th pins of 89c51 to make it work (execute) properly. Operating voltage for the GSM modem will depends on its type and an adaptor is provided with the GSM modem set itself. Here in this project various levels in dams are monitored and if they exceed the threshold values a SMS is sent through the concerned person. To perform all these activities first of all different levels should be monitor using liquid level indicators. These level indicators are placed in dam at different levels like level1, level2, level3 etc†¦ whenever if any level overflows automatically information is sent to the control section using GSM modem. The controlling part of the water level is also done by the controller through the instructions given by the developer. In this process the controller checks the number of threshold levels that are crossed and according to that the gates are being controlled. When modem receives the message controller will communicate with the modem through serial communication. As we can not directly give the data to the controller due to the voltage level difference between the GSM modem and the controller because GSM modem works on RS 232 logic levels whereas micro controller works on TTL logic levels and also we are using PC in this project which is also a RS 232 logic based. So to have compatibility we are using MAX 232. MAX232 converts from RS232 voltage levels to TTL voltage levels, and vice versa. One advantage of the MAX232 chip is that it uses a +5V power source which, is the same as the source voltage for the 8051. In the other words, with a single +5V power supply we can power both the 8051 and MAX232, with no need for the power supplies. The MAX232 has two sets of line drivers for transferring and receiving data. The line drivers used for TXD are called T1 and T2, while the line drivers for RXD are designated as R1 and R2. By using this to TX and RX pins we are going to communicate with the controller. CHAPTER 4 FLOW CHART TX Loop: [pic] RX Loop: [pic] CHAPTER 5 SCOPE AND FUTURE ENHANCEMENT It can be further enhanced by adding dtmf decoder to control the gate s of the dam and we send one msg to GSM amd that will be send the water level of the dam. If any unauthorized person tries to control the gate the GSM modem activate and that will pass this information to the authorized person. CHAPTER 6 CONCLUSION The project â€Å"DAM LEVEL WARNING USING GSM-SMS† has been successfully designed and tested. It has been developed by integrating features of all the hardware components used. Presence of every module has been reasoned out and placed carefully thus contributing to the best working of the unit. Secondly, using highly advanced IC’s and with the help of growing technology the project has been successfully implemented. Finally we conclude that â€Å"DAM LEVEL WARNING USING GSM-SMS† is an emerging field and there is a huge scope for research and development. CHAPTER 7 BIBILOGRAPHY 1. WWW. MITEL. DATABOOK. COM 2. WWW. ATMEL. DATABOOK. COM 3. WWW. FRANKLIN. COM 4. WWW. KEIL. COM 5. WWW. NATIONAL. COM 6. WWW. ATMEL. COM 7. WWW. MICROSOFTSEARCH. COM 8. WWW. GEOCITIES. COM 9. 8051-MICROCONTROLLER AND EMBEDDED SYSTEM. -Mohd. Mazidi 10. The 8051 Micro controller Architecture, Programming Applications -Kenneth J. Ayala 11. Fundamentals of Micro processors and Micro computers -B. Ram 12. Micro processor Architecture, Programming Applications -Ramesh S. Gaonkar 13. Wireless Communications -Theodore 14. S. Rappaport Mobile Tele Communications -William C. Y. Lee CHAPTER 8 APPENDIX Source code Software used: Keil software for c programming About keil software: It is possible to create the source files in a text editor such as Notepad, run the Compiler on each C source file, specifying a list of controls, run the Assembler on each Assembler source file, specifying nother list of controls, run either the Library Manager or Linker (again specifying a list of controls) and finally running the Object-HEX Converter to convert the Linker output file to an Intel Hex File. Once that has been completed the Hex File can be downloaded to the target hardware and debugged. Alternatively KEIL can be used to create source files; automatically compile, link and covert using options set with an easy to use user in terface and finally simulate or perform debugging on the hardware with access to C variables and memory. Unless you have to use the tolls on the command line, the choice is clear. KEIL Greatly simplifies the process of creating and testing an embedded application The user of KEIL centers on â€Å"projects†. A project is a list of all the source files required to build a single application, all the tool options which specify exactly how to build the application, and – if required – how the application should be simulated. A project contains enough information to take a set of source files and generate exactly the binary code required for the application. Because of the high degree of flexibility required from the tools, there are many options that can be set to configure the tools to operate in a specific manner. It would be tedious to have to set these options up every time the application is being built; therefore they are stored in a project file. Loading the project file into KEIL informs KEIL which source files are required, where they are, and how to configure the tools in the correct way. KEIL can then execute each tool with the correct options. It is also possible to create new projects in KEIL. Source files are added to the project and the tool options are set as required. The project is reloaded and the simulator or debugger started, all the desired windows are opened. KEIL project files have the extension Simulator/Debugger Coding include #include #include sbit M1 = P2^0; sbit M2 = P2^1; sbit M3 = P2^2; sbit L1 = P3^5; sbit L2 = P3^6; sbit L3 = P3^7; sbit Buz = P3^4; void TxMsg(unsigned char *msg,unsigned char *mno) { Send(â€Å"AT+CMGS=†); Send(mno); Delay_high(2); Send(msg); } void main() { bit L1_flag=0,L2_flag=0,L3_flag=0; LCD_Init(); Disp_Str(† Water Level â€Å" ); LCD_Cmd(0xC0); Disp_Str(â€Å"Warning System â€Å"); M1=M2=M3=0; Buz = 1; Delay (200); SConfig(); While (1) { If (L1==0 L2==1 L3==1 L1_flag==0) { L1_flag=1; L2_flag=0; L3_flag=0; Buz = 1; M1 = 1; M2 = 0; M3 = 0; LCD_Cmd (0x80); Disp_Str (â€Å"Water Level â€Å"); LCD_Cmd (0xC0); Disp_Str (â€Å"** MEDIUM **†); TxMsg (â€Å"Water Level – MEDIUM†,†9951024603†³); TxMsg (â€Å"Water Level – MEDIUM†,†9848997946†³); TxMsg (â€Å"Water Level – MEDIUM†,†9966644775†³); TxMsg (â€Å"Water Level – MEDIUM†,†9299804677†³); TxMsg (â€Å"Water Level – MEDIUM†,†9849974776†³); Delay (200); } else If (L1==0 L2==0 L3==1 L2_flag==0) { L2_flag=1; L3_flag=0; L1_flag=0; Buz = 1; M1 = 1; M2 = 1; M3 = 0; LCD_Cmd (0x80); Disp_Str (â€Å"Water Level â€Å"); LCD_Cmd (0xC0); Disp_Str (â€Å"** HIGH **†); TxMsg (â€Å"Water Level – HIGH†,†9951024603†³); TxMsg (â€Å"Water Level – HIGH†,†9848997946†); TxMsg (â€Å"Water Level – HIGH†,†9966644775†³); TxMsg (â€Å"Water Level – HIGH†,†9299804677†³); TxMsg (â€Å"Water Level – HIGH†,†9849974776†³); Delay (200); } else if (L1==0 L2==0 L3==0 L3_flag==0) // Level – 3 { L3_flag=1; L2_flag = 0; L1_flag=0; Buz = 0; M1 = 1; M2 = 1; M3 = 1; LCD_Cmd (0x80); Disp_Str (â€Å"Water Level â€Å"); LCD_Cmd (0xC0); Disp_Str (â€Å"** VERY HIGH **†); TxMsg (â€Å"Water Level – VERY HIGH†,†951024603†³); TxMsg (â€Å"Water Level – VERY HIGH†,†9848997946†³); TxMsg (â€Å"Water Level – VERY HIGH†,†9966644775†³); TxMsg (â€Å"Water Level – VERY HIGH†,†9299804677†³); TxMsg (â€Å"Water Level – VERY HIGH†,†9849974776†³); Delay (200); }else if(L1==1 L2==1 L3==1) Buz = 1; L1_flag=0; L2_flag=0; L3_flag=0; M1 = 0; M2 = 0; M3 = 0; LCD_Cmd (0x80); Disp_Str (â€Å"Water Level â€Å"); LCD_Cmd (0xC0); Disp_Str ( "** NORMAL**†); } } } KIT PHOTOS OF DAM LEVEL WARNING USING GSM SMS [pic] Kit photo of dam level warning using GSM SMS ———————– GSM MODEM MAX-232 POWER SUPPLY CONTROL SYSTEM LCD LIQUID LEVEL INDICATOR Level-3 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – — – – – – – – Level-2- – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – Level-1 – – – – â€⠀œ – – – – – — – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – — ———RESERVIOUR— MICRO CONTRO-LLER Tx Rx P0 P1 P2 P3 COUNTER INPUTS EXTERNAL INTERRUPTS CPU SERIAL PORT 4 I/O PORTS BUS CONTROL OSC TIMER 0 TIMER 1 ON CHIP RAM ON-CHIP RAM ON-CHIP FLASH INTERRUPT CONTROL RESET INTERRUPT L OCATIONS 8 bytes (0033)H 002BH 0023H 001BH 0013H 000BH 0003H 0000H How to cite Water Level Warning by Gsm, Essay examples

A Road Not Taken free essay sample

There are many decisions that need to be made in a persons life. Like choosing to spend time hanging out with friends, or to spend time studying for exams. The decisions that a person makes are based on their priorities. The person who chooses to hang out with friend values their friendship over their education, meanwhile, the person who chooses to study for their exams values their education. In the poem, The Road Not Taken Robert Frost uses a metaphor, imaginary, and the structure of the poem to tell the reader that the road a person chooses might be the right or wrong one, but it will make all the difference in their lives. Frost uses the metaphor to show that the choice impacts his life â€Å"The popularity of the poem is largely a result of the simplicity of its symbolism: The speaker must choose between diverging paths in a wood, and he sees that choice as a metaphor for choosing between different directions in life† (Andrews, Terry L). We will write a custom essay sample on A Road Not Taken or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The poet has to choose between two diverging roads, and they have to decide which road they will take to reach his destination Two roads diverge in a yellow wood (1). This not only shows that the speaker has two roads to take but they have two choices in life. Every person in life is going to have decisions to make, weather they are hard or easy, but it is the choice they make that makes them who they are â€Å" The loss of distinction between the roads accordingly casts doubt upon the speakers own sense of distinction in life. (Savoie, John) Robert Frost implies that the road chosen, which is the turning point that made his life different from all the rest and that has made all the difference (20). It is the decisions that one makes that makes them who they are. The imaginary in the poem shows how important a decision a person makes impacts their life. Every person has hard times deciding what they should choose to reach the road that they want to go on. One often questions them self, is this the right or wrong road that they are taking such as when Robert Frost writes two roads diverged in a yellow wood and sorry I could not travels both (1-2). The passage makes the reader see that the decision the poet is making is a difficult one. In the poem Frost describes the leaves being yellow illustrating that it is autumn. Autumn is the season were the leaves change color and life starts to die. As the poem continues it says Because it was grassy and wanted wear (8). Frosts mention of the grass makes the reader think that there is some life on the trails also showing the color green that Frost illustrates. There is a big difference to the yellow and the green. The yellow being the difficult time, while the green being a simple and more laid back time. Therefore the imagery in the poem shows how the decision impacts his or her life. Finally the structure of the poems four stanzas shows how the choice the poet makes impacts his life. In the first stanza the poet is explaining to the reader the situation of choosing which road to take. The second stanza, the speaker chooses the road that is less traveled, but then realizes that they were both just as traveled â€Å"Had worn them really about the same,† (10). In the third stanza the poet continues to describe the road he has taken, and how he would like to come back travel the other road and the feels sorry he couldnt travel both. As the poet travels down his road time has passed by. The poet explains how the road he took â€Å"And having perhaps the better claim Because it was grassy and wanted wear,† (7-8). The poems four stanzas show the decision that the poet makes impacts his life. In The Road Not Taken Robert Frost enables the reader to see the choice that he has made that impacts his life. The metaphor, the descriptive imagery, and the poems structure shows that the road the poet has chosen made all the difference in his life. A persons decision often affects their life. A good decision will lead them on a good road. While a bad decision will lead us down a bad road. We may not know if our decision maybe the right or bad one at the moment, but we will see the outcome in the end. Things happen in your life based on how you decide things not how others decide things.