A Proposed Computerized Payroll System - It

Topics: Photovoltaics, Solar cell, Photovoltaic module Pages: 12 (4587 words) Published: January 12, 2013

Chapter I
Electricity is a naturally occurring force that exists everywhere and it is used to power many things that are used in our everyday life. Without electricity, people’s lives would be very different and in many cases more difficult. There are many ways to generate electricity; one way in producing electricity is the use of solar cells. Solar cells or photovoltaic cells are made of semiconductor materials such as silicon and designed to convert light energy into electrical energy by the photovoltaic effect. Photovoltaic effect is the basic physical process through which a solar cell converts light into electricity. Light is one of the most abundant forms of energies and by using this energy in a proper way an eco-friendly form of energy can be produced. When light energy strikes, it absorbs photons of light and releases electrons these free electrons then forms an electric current that can be used to power a load. According to The World Factbook, the world has over 5 billion mobile phone users. In the Philippines alone, there are 92,227,000 mobile cellular telephone subscribers, placing the country in the 11th position of most number of mobile phone users in the year 2010. This fact shows that mobile phones are essential therefore the batteries are needed to be charged and one way to charge it, is through solar energy. For its commercial purpose, the solar powered mobile phone charger is designed to have a coin timer that will recognize the coin to activate the timer and the mobile phone charger. The time that it will take for the mobile phone to charge depends on the amount of money that will be inserted in the device. Through this, the materials used for the machine, like the solar calls, will be recovered. The convenience of the machine lies in its capability to be installed either indoor or outdoor locations as long as there is light that can be absorbed by the photovoltaic cells. Background of the Study

From the survey given randomly to some students and employee’s most of them frequently use…. try dn to.. From the survey that was gathered, most people frequently usetheir mobile phones and sometimes forget to charge their phones at home; such causes them to run out of battery charge when they need to use it outside, especially in emergency purposes. The places where they need to charge their phones the most in case of emergency are schools, hospital, mall, offices, bus stations and other terminals. For the past years, a mobile phone charger coin-operated machine already exists in the Philippines and this was stated from the article of Rey Gamboa from Philippine Star. However, this machine is usually available on public and indoor places like Ministop and 7-eleven and are powered by power grids. Therefore, the proposed design is a mobile phone charger vending machine that uses solar cells to produce electricity that will power the device without the need for outlet plugging(the power in the outlet… try to… ). It can be used on both indoors and outdoors as long as light is available.It may also payback the expense of the material used and the good thing is that the time span of a solar cell is about 30 years according to the studies done in 2007 by International Journal of Environmental Technology and Management. It may also payback the expenses for the materials used in having solar cells and it has a time span of more than thirty years according to the studies of the International Journal of Environmental Technology and Management in the year of 2007. trydn… Statement of the Problem

This project study dealt in the development of using free energy caused by light that produces electricity for the mobile phone charger. This form of transforming energy will help lessen the environmental problem such as pollution, global warming, acid rain or smog.At the same time, it paybacks the causeof the solar cells itself by using it as a solar powered...
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