Implementation of Solar Tracking System Using RTC

Implementation of Solar Tracking System Using RTC ABSTRACT: The main objective of this project is to track the solar energy efficiently and using the same for the house hold applications like glowing Small Bulb, Mobile Phone Charging etc., Commercial made solar trackers to any solar panel array help in increasing the time of the panels facing the sun and allow them to produce their maximum power. Unfortunately they can be expensive to buy. We decided to make our own solar tracker to see if we could reduce the cost. We did not want to re- invent the wheel but wanted to make it more affordable. We started out small and came up with the idea of solar tracking using time instead of using a device that would sense where the sun is and moving the panel towards it. The objective of this project is to control the position of a solar panel in accordance with the motion of sun. Thus our objective is efficient utilization of the solar energy for development of nation and clean environment. Key Words: Solar Tracker, RTC, LDR I. INTRODUCTION: Today, 70% of the population in Indian rural areas experience a dramatic situation where the electric supply is very low and irregular, and in some cases, completely absent from 80,000 villages in the country. The country suffers from unequal energy distribution, with power cuts of 2 to 3  hours in major cities, and in rural areas from 6 to 10 hours during the hot season (May to June). Up to 50% of households in India have no access to modern lighting and the electric grid did not reach remote places of the countryside, with some provinces lacking electricity in the 95% of the region. There are some solutions like solar electricity from solar panels. Although many assume that renewable energy is too expensive for the poor but if it is combined with affordable financing mechanisms, it can be fully implemented and makes this type of clean electricity (and many others like portable rechargeable lamps) a viable option for millions in India. Both renewable and non renewable resources are being used for production of electricity to meet the needs. But non renewable resources are under the stage of extinction so it is better to choose the renewable resources. II.  EXISTING SYSTEM: The simplest of all uses an LDR a Light Dependent Resistor to detect light intensity changes on the surface of the resistor. Other methods use two phototransistors covered with a small plate to act as a shield to sunlight, as shown in Fig. 2. When morning arrives, the tracker is in state A from the previous day. The left phototransistor is turned on, causing a signal to turn the motor continuously until the shadow from the plate returns the tracker to state B. As the day slowly progresses, state C is reached shortly, turning on the right phototransistor. The motor turns until state B is reached again, and the cycle continues until the end of the day or until the minimum detectable light level is reached. Fig.1: Principle of operation of an LDR The problem with a design like this is that phototransistors have a narrow range of sensitivity, once they have been set up in a circuit under set bias conditions It was because of this fact that solar cells themselves were chosen to be the sensing devices. They provide an excellent  mechanism in light intensity detection  making use of renewable energy (solar energy) to produce power. The same energy which is generated further used mobile phone charging, household applications such as glowing small bulb etc., The diagram shows the overview of our project, when the system is on Real Time Clock gives the auto update of Time, date to microcontroller, this information is displayed on LCD through microcontroller. According to the time provided by RTC stepper motor will rotates with particular angle to change the position of solar panel to absorb solar energy. The energy absorbed by solar panel will charge battery, From battery it is given to mobile phone charging circuit which is fur ther used to charge the mobile phone. At the same time the energy stored in the battery used by power circuitry for glowing small lamp etc., FUNCTIONAL BLOCK DIAGRAM: because they are sensitive to varying light and provide a near linear voltage range that can be used to an advantage in determining the present declination or angle to the sun. As a result, a simple time operated solar tracking system using RTC based control system is proposed, with the tilt times of a panel position with respect  to natural position of the Sun has been RTC DS1307 MICRO CONTROLLER AT89S52MECHANICAL ROTATING UNIT DISPLAY UNIT LCD 16X2 POWER SUPPLY SOLAR PANEL BATTERY CHARGING UNIT BATTERY POWER CIRCUITARY implemented as an algorithm to controller. III. PROPOSED SYSTEM Now a days power problem is becoming big issue in society to minimize that we came up with this project. Here we are   Fig2: Block diagram of proposed solar tracking system. The main components used are microcontroller (AT89S52), RTC (DS1307), ADC (MCP3201), Op-Amp (LM324N), 16X2 LCD, Voltage controller (7805). The solar panel, Battery, DC motors are connected externally. The solar panel used in our project is made up of poly-crystalline cells. For these cells aiming is not critical as the cells are picking up the light from many different angles. IV. WORKING The power supply is given to the tracking system from external battery.7805 voltage regulator converts this incoming power supply into 5 volts in order to provide supply to other components in the system. The program to the AT89S52 micro controller is given through ISP pins. Based on RTC , the number of tilts of the panel will be set manually using four switches that are fed as an inputs to the  74LS21 AND gate and its output as an interrupt to the controller. Real Time, Tilt time settings are displayed on LCD which is connected to Port 1 of the micro controller. In this project, we use 4 tilts for tracking purpose and 5th tilt for bringing the panel back to the initial position. The RTC continuously runs and sends a high output to the microcontroller at our prescribed tilt time. Then microcontroller sends a high output to the L293D driver which drives the DC motors connected to the panel. The panel rotation or tilt angles will be initially fixed in the program that is given to the microcontroller. The output of solar panel is connected to OpAmp which amplifies the signal and gives it to the ADC which is connected to the port 1 of the microcontroller. Voltage generated by the panel as per the individual tilt time is  displayed on LCD. Display of LCD is shown in fig 6. Fig 3: LCD displaying the time and date LCD is used as the display unit. It stands for Liquid Crystal Display. These components are specialized for being used with the microcontroller. LCD screen consists of two lines with 16 characters each. Each character consists of 5x7dot matrix. Here we use LCD to display real time provided by RTC. EXPERIMENTAL RESULTS: Fig 4: Prototype of Time operated solar tracking system using RTC Fig 5: Control equipment of solar tracking system CONCLUSION: The design of microcontroller based on efficient solar tracking system with real time clock is developed and described. The proposed system provides a variable indication of their relative angle to the sun by comparing with pre defined measured readings. By using this method, the solar tracker was successfully maintained a solar array at a sufficiently perpendicular angle to the Sun. The power increase gained over a fixed horizontal array was in excess of 40%. The proposed design is achieved with low power consumption, high accuracy and low cost. References: Table 1: Captured Panel voltage with proposed tracking system. S.NO TIME PANELVOLTAGE (V) 1 8.00 AM 9.0 2 9.00 AM 12.5 3 10.00 AM 13.0 4 11.00 AM 13.5 5 12.00 PM 14.0 6 1.00 PM 14.5 7 2.00 PM 12.5 8 3.00 PM 11.4 9 4.00 PM 9.3 10 5.00 PM 6.5 11 6.00 PM 1.5 Table 2: Captured panel voltages without proposed tracking system

North American Free Trade Agreement

The NAFTA agreement was signed in 1992, ratified in 1993 and implemented in 1994. It was designed to completely rescind trade barriers between these three nations. It had been surmised that this agreement would enhance employment due to increase in trade (North American Free Trade Agreement (NAFTA) , 1995).This agreement, which is second only to the European Economic Area in trade volumes, constitutes a single free trading zone for approximately three hundred and sixty – five million consumers of these three countries. It set aside import duties on a large number of goods that were exported from the US to Mexico and over a period of fourteen years, hoped to eliminate all tariffs. Subsequently, sections on affording protection to workers and the environment were included (Vogel, 2007).An agreement was reached between Canada, Mexico and the United States of America, whereby a free trade zone was to be created between these countries. This was termed as the North American Free Tr ade Agreement or the NAFTA. It has been instrumental in providing a platform for resolving trade related disputes amongst these nations. Furthermore, the NAFTA has actively taken up the safeguarding of intellectual property rights and compliance with the laws relating to the protection of such rights (North American Free Trade Agreement (NAFTA) , 2003).The NAFTA has engendered bitter and persistent opposition. A number of collective bargaining organizations have highlighted the fact that the prevalence of abundant and comparatively cheaper labor in Mexico has prompted several manufacturers to shift their operations to that country. The result of this relocation has been a drastic reduction of jobs in the US. However, opponents to this contention have argued that the free trade brought about by the NAFTA has generated more jobs than it has destroyed in the US (North American Free Trade Agreement (NAFTA) , 2002).There has been a marked increase in unemployment in the US. Moreover, the number of immigrants, both legal and illegal, into the US has depicted an unprecedented increase. The mass immigration of Mexicans is so grave that on many an occasion, they have risked their lives to enter the US. A meaningful decision regarding the various disputes besetting NAFTA has not been taken and it seems to have failed miserably (Tonelson, 2004).The consensus of most of the authentic reports has been that NAFTA has benefited only the transnational corporations. Workers, farmers and small businesses in Canada, Mexico and the US have uniformly been put to a huge loss. In addition, the environment has also sustained considerable damage due to this agreement. The health, safety and rights of labor in all three countries were badly compromised. However, there was a significant boost to the economy of the US and Mexico (Brown). Therefore, it can be stated, unequivocally, that the NAFTA, has by and large been a fiasco and the only beneficiaries have been the transnational corpor ations. â€Å"North American Free Trade Agreement (NAFTA).† The New Dictionary of Cultural Literacy, Houghton Mifflin. 2002. CredoReference. 18 December 2007 . The New Dictionary of Cultural Literacy, Houghton Mifflin, 2002, s.v. â€Å"North American Free Trade Agreement (NAFTA),† DISPLAYURL (accessed December 18, 2007). http://www.credoreference.com/entry/2444726ReferencesBrown, G. (n.d.). Speak Out: Portrait of a Failure, NAFTA and Workplace Health and Safety. Retrieved December 18, 2007, from MHSSN: http://mhssn.igc.org/brown_synergist.htmNorth American Free Trade Agreement (NAFTA) . (2002). Retrieved December 18 , 2007, from The New Dictionary of Cultural Literacy, Houghton Mifflin: http://www.credoreference.com/entry/2444726North American Free Trade Agreement (NAFTA) . (1995). Retrieved December 18 , 2007, from In Dictionary of Economics, Wiley: http://www.credoreference.com/entry/2765482North American Free Trade Agreement (NAFTA)North American Free Trade Agreemen t (NAFTA) . (2003). Retrieved December 18, 2007, from Webster's New World Finance and Investment Dictionary: http://www.credoreference.com/entry/Tonelson, A. (2004, January 20). NAFTA at 10 – A Miserable Failure. Retrieved December 18, 2007, from American Economic Alert: http://www.americaneconomicalert.org/view_art.asp?Prod_ID=936Vogel, D. (2007). North American Free Trade Agreement . Microsoft ® Student 2008 [DVD] . Redmond, WA: Microsoft Corporation  ® 2008.  © 1993-2007 Microsoft Corporation. North American Free Trade Agreement NAFTA agreement was signed in 1992, ratified in 1993 and implemented in 1994. It was designed to completely rescind trade barriers between these three nations. It had been surmised that this agreement would enhance employment due to increase in trade (North American Free Trade Agreement (NAFTA) , 1995).This agreement, which is second only to the European Economic Area in trade volumes, constitutes a single free trading zone for approximately three hundred and sixty – five million consumers of these three countries. It set aside import duties on a large number of goods that were exported from the US to Mexico and over a period of fourteen years, hoped to eliminate all tariffs. Subsequently, sections on affording protection to workers and the environment were included (Vogel, 2007).An agreement was reached between Canada, Mexico and the United States of America, whereby a free trade zone was to be created between these countries. This was termed as the North American Free Trade Agreement or the NAFTA. It has been instrumental in providing a platform for resolving trade related disputes amongst these nations. Furthermore, the NAFTA has actively taken up the safeguarding of intellectual property rights and compliance with the laws relating to the protection of such rights (North American Free Trade Agreement (NAFTA) , 2003).The NAFTA has engendered bitter and persistent opposition. A number of collective bargaining organizations have highlighted the fact that the prevalence of abundant and comparatively cheaper labor in Mexico has prompted several manufacturers to shift their operations to that country. The result of this relocation has been a drastic reduction of jobs in the US. However, opponents to this contention have argued that the free trade brought about by the NAFTA has generated more jobs than it has destroyed in the US (North American Free Trade Agreement (NAFTA) , 2002).There has been a marked increase in unemployment in the US. Moreover, the num ber of immigrants, both legal and illegal, into the US has depicted an unprecedented increase. The mass immigration of Mexicans is so grave that on many an occasion, they have risked their lives to enter the US. A meaningful decision regarding the various disputes besetting NAFTA has not been taken and it seems to have failed miserably (Tonelson, 2004).The consensus of most of the authentic reports has been that NAFTA has benefited only the transnational corporations. Workers, farmers and small businesses in Canada, Mexico and the US have uniformly been put to a huge loss. In addition, the environment has also sustained considerable damage due to this agreement. The health, safety and rights of labor in all three countries were badly compromised. However, there was a significant boost to the economy of the US and Mexico (Brown). Therefore, it can be stated, unequivocally, that the NAFTA, has by and large been a fiasco and the only beneficiaries have been the transnational corporatio ns. â€Å"North American Free Trade Agreement (NAFTA).† The New Dictionary of Cultural Literacy, Houghton Mifflin. 2002. CredoReference. 18 December 2007 . The New Dictionary of Cultural Literacy, Houghton Mifflin, 2002, s.v. â€Å"North American Free Trade Agreement (NAFTA),† DISPLAYURL (accessed December 18, 2007). http://www.credoreference.com/entry/2444726ReferencesBrown, G. (n.d.). Speak Out: Portrait of a Failure, NAFTA and Workplace Health and Safety. Retrieved December 18, 2007, from MHSSN: http://mhssn.igc.org/brown_synergist.htmNorth American Free Trade Agreement (NAFTA) . (2002). Retrieved December 18 , 2007, from The New Dictionary of Cultural Literacy, Houghton Mifflin: http://www.credoreference.com/entry/2444726North American Free Trade Agreement (NAFTA) . (1995). Retrieved December 18 , 2007, from In Dictionary of Economics, Wiley: http://www.credoreference.com/entry/2765482North American Free Trade Agreement (NAFTA)North American Free Trade Agreement (N AFTA) . (2003). Retrieved December 18, 2007, from Webster's New World Finance and Investment Dictionary: http://www.credoreference.com/entry/Tonelson, A. (2004, January 20). NAFTA at 10 – A Miserable Failure. Retrieved December 18, 2007, from American Economic Alert: http://www.americaneconomicalert.org/view_art.asp?Prod_ID=936Vogel, D. (2007). North American Free Trade Agreement . Microsoft ® Student 2008 [DVD] . Redmond, WA: Microsoft Corporation  ® 2008.  © 1993-2007 Microsoft Corporation.

The Channel Tunnel Project Management Essay - 4222 Words

A PROJECT ANALYSIS ON THE DEVELOPMENT OF THE CHANNEL TUNNEL 1.0 INTRODUCTION The Channel Tunnel is one of Europes biggest infrastructure projects ever. The 50.45km long tunnel has fulfilled this old dream by linking Britain and the rest of Europe. The idea of a fixed link between Britain and France was first mooted by a French engineer in 1802; it connects England and France 50m below the seabed of the English Channel. Its not just a tunnel, but a huge infrastructure containing massive machinery and control systems in an underwater tunnel system (Lemley, 1995; Kirkland, 1995). In 1990 the service tunnels broke through at the halfway point. The main rail tunnels met on May 22, 1991 and on June 28, 1991, each accompanied by a†¦show more content†¦Several adaptations to the traditional approaches like agile, interactive, phased, extreme, etc have been made but each will be expected to meet the requirements of the project objectives, timeline, resources, and deliveries of the stakeholders. Other industry standard certifications like ISO9000 and regulatio ns like the Sarbanes-Oxley have also influenced methodologies and processes used by several organisations (Kerzner, 2003). Generally, managing projects should involved five major process which include the project initiation, planning, execution, monitoring and controlling, and then project closing. See Fig. 2 below. [pic] Fig 2: Major Project Management Processes. (Source: US DEPARTMENT OF VETERANS AFFAIRS) The nature and scope of a project is determined at the initiation stage. This involves analyzing the business needs, developing goals, budgets, tasks, deliverables, and the stakeholder analysis. The project planning stage determines the planning team, develops the scope, and identifies work breakdown structure and activities that will be needed to complete deliverables. The planning stage also estimates time and cost activities, develop schedule and risk plan, and gain formal approval for work to begin. 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Early Signs Of A Progressive Dementia - 784 Words

The early signs of a progressive dementia often bring discord to families, because siblings disagree on what is really wrong and chalk up the changes they are seeing to depression, boredom, a recent illness or even â€Å"allergies†. One of the family members usually suspects something like â€Å"Alzheimer’s† but the other disagree thus diagnosis is delayed. Early dementia is also known as MCI (Mild Cognitive Impairment) and only about half of those with this diagnosis move on to one of the more progressive dementias. So, it is understandable that some in a family might say – â€Å"Grandma was just like Dad.† â€Å"But, she was able to take care of herself till she was 85.† The importance of early diagnosis is three fold: 1) Allows the person with a progressive illness to be more involved with the planning for the future. 2) Allows the AD person to participate in drug studies and/or to take medications that extend the functionality for activities of daily living. 3) Helps the primary care givers to plan for the future so they are not always wondering what will happen – they then can start planning for sharing the care, cost of care and legal documents that will be needed. If your family member is younger and you have not sought a diagnosis it is sometimes a good idea to seek Long Term Insurance before the diagnosis because would most often a dementia diagnosis would prohibit that individual from qualifying. 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