Keeping our mobile phones alive is the most important task now a days, So here a small idea of charging mobile phones with help of renewal energy source.

1. S0LAR MOBILECHARGER

2. CONTENTS
1. Introduction
2. Solar Process
3. PV Cell specification
4. Manufacturing of solar cell
5. Specification of charger
6. Block Diagram
7. Circuit Diagram
8. Application
9. Advantage
10. Disadvantage
11. Future Scope
12. Conclusion.

3. INTRODUCTION
* Solar mobile charger is the device which can charge the cell phone with the help of solar power.
* The main source of this solar power is sunlight . Sunlight is made up of photons or packets of
energy.
* These photon contains various amount of energy corresponding to different wavelength of light .
* When a photon is absorbed , the energy of the photon is transferred to an electron in an atom of th
cell , that is we can say that solar cell directly converts solar energy into electricity.
* In today era 80% of the energy we use , comes from fossil fuel and about only 1% comes from solar
energy. It is estimated that the world’s oil reserves will last for 30 to 40 years where solar energy is
forever.
* Solar energy has two big advantage over fossil fuel:
* It is renewable.
* No effect on the environment.
* There is also some drawbacks of solar energy, like that it can’t produce in the absence of sunlight.

4. SOLAR PROCESS
* Solar cell works on photovoltaic effect. Sunlight
composed
of photons of different wavelength.
* When photon strikes on solar cell ,they may be
reflected or
absorbed.
* When a photon is absorbed , the energy of photon is
transferred to an electron in an atom of the
cell(which is generally semiconductor).
* When electron will get energy ,it will be able to move,

5. PV CELL SPECIFICATION
* Photovoltaic cell is an electrical device that convert the energy of ligh
directly into electricity by photovoltaic effect.
* The operation of PV Cell require three basic attributes:
1. The absorption of light , generating electron-hole pair.
2. The separation of charge career of opposite types.
3. The separate extraction of those carriers to an external circuit.

6. MANUFACTURING OF SOLAR CELL
* Row material: The basic components of solar cell is pure silicon , whic
not pure in natural state.
* Purifying the silicon and making single crystal silicon.
* Making small small silicon crystal.
* Doping : It is used to increase the strength of material.
* Anti Reflecting Coating : to improve efficiency.
* Encapsulating the cell.

7. SPECIFICATION OF CHARGER
* Use high efficiency mono-crystalline silicon.
* Solar Panel: 5.5V/1000mA.
* Output Voltage: 5.5V.
* Output Current: 300-550mA.

8. BLOCK DIAGRAM

9. CIRCUIT DIAGRAM

10. APPLICATION
* To charge mobile phone and camera (Digital as well as CC camera)
* MP3 , CD and MD players can be charged.
* This device can also be used to charge batteries of portable DVD ,
smart cards readers , etc
* Ability to recharge AA batteries any time & any where there is sun
light.
* To power 2W bulbs in hut , bed-lamps , low watt lights , etc.

11. ADVANTAGE
* Utilize renewable sources.
* Uses low input voltage to produce high voltage spikes of
output
for charging.
* Bring convenience to the users.
* Useful for users in remote area & portable for travellers.
* To save the electricity bill cost in the long run.
* Reduce environmental pollution.

12. DISADVANTAGE
* Cost is high.
* It will not work in cloudy day.
* They are only use for small amount of time.
* It may not be ideal in your situation.
* Solar charger have no capacity to store the energy.
* It is also applies to the portable device.
* Charger is different type such as – Laptop , cell phone &
MP3 player

13. FUTURE SCOPE
* Solar energy can only be harnessed when it is daytime and sunny .
To overcome this , solar panels can be coupled with back-up battery
which can store the excess power generated during the day and use
it to improve energy to system in the absence of sunlight.
* The large size of solar panel makes the device bulky and non-portable
The solar panel should be fabricated to cover the entire device , which
can effectively reduce the size of the entire device.

14. CONCLUSION
* To make sure we have plenty of energy in the future . it’s up to all of us to use energ
* We must all conserve energy and use it efficiently.
* All energy source have an impact on the environment. Concern about more developm
renewable energy sources such as solar , hydrogen wind etc.
* In solar mobile charger ripples will not be there as we use DC power directly to char
mobile .
* Versatility of solar mobile charger is high.
* Life of the battery will be high as we use solar mobile charger.
* Adaptability is high.

15. THANK YOU !