presented by:
A.Alfred Ignatius
D.Balaji
S.Antony Lawrence
G.Arun Praharish
B.Felix
P.Murugan


SOLAR AUTOMATIC MOBILE CHARGER WITH PAY SYSTEM
 ABSTRACT:
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THE DAWN OF 4G: GENERATION NEXT
ABSTRACT
Third-generation (3G) mobile networks face a new rival: so-called 4G. And, astonishingly, the new networks may even be profitable. Alvin Toffler, an eminent futurologist, once said, THE FUTURE ALWAYS COMES TOO FAST, BUT IN THE WRONG ORDER. The state of wireless telecoms is a classic example. Even as 3G mobile networks are being switched on around the world, a couple of years later than planned, attention is shifting to what comes next: a group of newer technologies that are, ine ....etc

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INTRODUCTION
Solar energy is an attractive energy source for powering portable devices. For some time, it has been widely used in applications like calculators and spacecraft.More recently, solar power is being considered for a much wider range of consumer applications including mobile phone chargers. However, power available from a solar panel is heavily dependent on the operating environment. This includes such things as light intensity, time and location. Therefore, batteries typically are used as energy storage el ....etc

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i need the complete details of this project. lz help me ....etc

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sir plz help me in this project and kindly rply with how to to initiate for the topic................
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plz send me the complete detail of this topic solar automatic cell phone charger with pay system ....etc

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Solar Electric Charge Controller and
Portable Power Supply

This projects is a device that will allow a solar panel to efficiently recharge a DC battery. The solar panel is operated at an optimal power level regardless of the battery voltage. The controller will vary the voltage across the panel
to find and maintain the maximum power point. the battery is charged using using pulse width modulation techniques. The major components of the projects are:
-a boost DC-DC converter
-a microcontroller
-a current sensing microchip
-a Liq ....etc

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You can save on your electricitybills by switching to alternativesources of power. Thephotovoltaic module or solar paneldescribed here is capable of deliveringa power of 5 watts. At full sunlight,the solar panel outputs 16.5V.It can deliver a current of 300-350mA. Using it you can charge threetypes of batteries: lead acid, Ni-Cdand Li-ion. The lead-acid batteriesare commonly used in emergencylamps and UPS.The working of the circuit is simple.The output of the solar panel isfed via diode 1N5402 (D1), whichacts as a polarity gu ....etc

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Sir,

I want to build a solar charger for a 48v lead-acid battery using the MPPT technology. Can you please suggest a way for the same? I have searched a lot on the internet but could not find a circuit for charging a 48v battery, instead i could only find one for a 12v. Is it the same? I would be thoroughly obliged if you could answer my question.

Abhishek Walimbe,
2nd Year B.TECH(Electronics) ....etc

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