This document presents a summary of a presentation on a solar mobile charger. It discusses how solar panels convert sunlight into electrical energy through the photovoltaic effect. A circuit diagram and working principle are provided showing how the solar energy is regulated to a stable 5V to charge mobile phones and other devices. The summary highlights key advantages like using a renewable energy source freely without maintenance, and disadvantages such as slower charging times compared to main chargers. Applications mentioned include charging small portable electronics and using public solar chargers installed in parks.

1. A PRESENTATION
ON
SOLAR MOBILE CHARGER
SASWATI SOUMYA SHARMA
Regd. no-1721105049
Roll no-35337
Branch-ELECTRICAL ENGINEERING

2. Contents:
 Introduction
 Objectives
 Block diagram
 Ckt diagram
 Working principle
 Advantages and disadvantages
 Applications
 Conclusion
 References

3. Introduction:
 The sun is made up of hydrogen and helium and it emits enormous
amount of heat.
 A solar cell which forms a primary part of the solar mobile charger works
on the principle of photovoltaic effect.
 It is made up of packets of energy called ‘photons’.
 When a photon is absorbed the energy of the photon is transferred to the
electron.

4. Objectives:
 To study the basic operations of a solar mobile charger.
 To know the advantages and limitations of its use.
 To know the future scope of solar mobile charger.
 Maximizing the use of it in day to day life.

5. Solar panel:
 A solar panel is a set of solar photovoltaic
modules electrically connected and mounted
on a supporting structure.
 It can be used as a component of a larger
photovoltaic system to generate and supply
electricity in commercial and residential
applications.
 A photovoltaic system typically includes an
inverter,and sometimes a battery and solar
tracker.

6. Regulator:
 A 5v voltage regulator is used to ensure
that no more than 5v is delivered .
 If a DC supply of greater than 12v is used,
excessive heat will be generated and the
board may be damaged. If a DC supply of
less than 5v is used, insufficient voltage will
be present at the regulator’s output.
 If a power supply provides a voltage higher
than 7or 8 volts, the regulator must
dissipate significant heat.

7. Working principle:
 Photons attacking the solar cells are
absorbed by any semiconducting material
such as silicon.
 The energy of the absorbed photon is
transferred to the electron.
 This energy knocks of the electrons from the
atoms.
 It flows unidirectional through the material
which provides electrical energy.
 An array of solar cells convert the solar
energy into usable electrical energy.

8. Circuit diagram:

9. Andvantages:
 Solar energy is a renewable energy sources.
 Solar energy comes in free of charge.
 Solar cells panel on the solar charger does not require much maintenance.
 It also helps reduces cost such as electric bills as the solar charger source
of energy is free.

10. Disadvantages:
 Solar charger need light to work.
 Charging a device by solar charger is much slower than the main charger.

11. Applications:
 Used for low power portable electronics, like calculators or small fans.
 Small portable models designed to charge a range of different mobile
phones, iPods or other portable audio equipment.
 Public solar chargers permanently installed in public places,such as parks and
streets which can use for free.

12. Conclusion:
 Battery life is more as high voltages are not developed.
 Adoptability is also high. So solar mobile charger is highly applicable in
today’s world.
 Solar energy is renewable and can be used for the simplest of purpose i.e
solar mobile charger.

13. References:
1. SOLAR ENERGY BASED MOBILE CHARGER A. H. Tirmare, V. V. Khandare, P. S. Mali Assistant
Professor, E &TC, Bharati vidyapeeth‟s College of Engg. Kolhapur, Maharashtra, India
2. M.S.Varadarajan Veltech Dr.RR and Dr.SR Technical University Chennai, India“Coin Based
Universal Mobile Battery Charger” IOSR Journal of Engineering (IOSRJEN) ISSN: 2250-3021
Volume 2, Issue 6 (June 2012), PP 1433-1438 www.iosrjen.org ISSN: 2250-3021
www.iosrjen.org 1433
3. Kalyani U. Chafle, B. M. Faruk, R. S. Shrivas, N.S.SawarkarResearch Scholar, Department of
Electronics and Telecommunication Engineering, Jawaharlal Darda Institute of Engineering &
Technology, Yavatmal, INDIA “Coin based mobile charger on solar energy” International
Journal Of Research –Granthaalayah Vol.3(Iss.1):January,2015] ISSN- 2350-0530(O) ISSN2394-
3629(P)
4. Pastre, M. Krummenacher, F. Robortella, R. Simon-Vermot, R. Kayal, M. Ecole Polytech. Fed. de
Lausanne, Lausanne, A fully integrated solar battery charger Circuits and Systems and TAISA
Conference, 2009. NEWCAS-TAISA '09. Joint IEEE North-East Workshop

14. THANK YOU