solar mobile charger

1. GOVT. MAHILA ENGINEERING COLLEGE, AJMER
PROJECT PRESENTATION ON:
SOLAR MOBILE CHARGER
PROJECT SUPERVISOR: SUBMITTED BY:
MR. S. N. JOSHI JYOTI GARG(17EEMEE015)
ASST. PROFESSOR KHUSHI LOHIA(17EEMEE018)
(EE DEPARTMENT ) MONIKA TAILOR(17EEMEE025)
NANDINI PAREEK(17EEMEE027)
NISHA DANGI(17EEMEE030)
GELOT TARA BEN(18EEMEE201)

2. CONTENTS:
 Introduction
 Objectives
 Methods and Procedures
 Circuit diagram
 Solar panel
 Regulator
 Working
 Specifications
 Advantages
 Disadvantages
 Applications
 Results and Discussion
 Conclusion

3. INTRODUCTION:
 The sun is made up of hydrogen and helium and it emits large
amount of heat and light.
 It is made up of packets of energy called “Photons”.
 A solar cell which forms a primary part of the solar mobile charger
works on the principle of photovoltaic effect.
 When a photon is absorbed the energy of the photon is transferred to
the electron.

4. OBJECTIVES:
 To design and assemble solar mobile charger.
 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 the solar mobile charger.
 Maximizing the use of it in day to day life.

5. METHODS AND PROCEDURES:
 The hardware components needed for making a solar mobile charger
are:
• Solar Panel
• Voltage Regulator
• Switch
• Resistors
• Output Jack.

6. BLOCK DIAGRAM :

7. CIRCUIT DIAGRAM :

8. CIRCUIT :
 The solar panel thus convert solar energy to electrical energy.
 The output from the solar panel is now sent to a voltage regulator
IC7805.
 The voltage regulator ensures that the final output voltage does not
exceed 5V.
 Thus a constant voltage is supplied and the mobile gets charged.

9. SOLAR PANEL
 A solar panel is a set of solar photovoltaic modules
electrically connected and mounted on a supporting
structure.
 A photovoltaic module is a packaged, connected
assembly of solar cells.
 The solar panel 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 a panel or an
array of solar modules, an inverter, and sometimes a
battery and/or solar tracker and interconnection wiring.
R

10. REGULATOR
 A 5V voltage regulator (7805) is used to ensure that no more than
5V is delivered to the Digi lab board 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 regulators output. If a power supply provides a voltage
higher than 7 or 8 volts, the regulator must dissipate significant heat.

11. WORKING:
 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 off the electrons from the atoms.
 It flows unidirectional through the material which provides electrical
energy.
 An array of solar cells convert solar energy into usable Electrical
energy.

12. SPECIFICATIONS:
 Uses high-efficiency monocrystalline silicon
 Solar panel: 5.5V/1000mA
 Output voltage: 5.5V
Output current: 300-550mA

13. ADVANTAGES:
 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.

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

15. APPLICATIONS:
 For low-power portable electronics, like calculators or small fans, a
photovoltaic array may be a reasonable energy source rather than a
battery.
 Solar chargers can charge lead acid or Ni-Cd battery bank up to 48
V and hundreds of ampere-hours (up to 400 Ah) capacity.
 Small portable models designed to charge a range of different
mobile phones, cell phones, iPods or other portable audio
equipment.
 Public solar chargers permanently installed in public places, such as
parks, squares and streets, which passersby can use for free.

16. RESULTS AND DISCUSSION:
 It can be used in various applications and has a lot of features.
 Relatively small size and can be used anywhere(portability).
 Requires no electrical start-up power.
 Higher efficiency than photovoltaic systems of the same size.
 Low maintenance, emission free and environment friendly.
 But one of the major factors that needs to be discussed is about the
cost.
 The charging rate of a solar charger can be much slower than that of
a normal charger.
 These are the few points that are to be discussed so that solar
charger can be used without any more disadvantages.

17. CONCLUSIONS:
 The energy must thus be conserved and used efficiently.
 Battery life is high and also its adaptability.
 So, Solar mobile charger is highly applicable in today’s world.
 This is due to the continual depletion of resources.
 Solar energy is renewable and can be used for the simplest of
purpose i.e. solar mobile charger.

18. THANK YOU