DESIGN AND CONSTRUCTION OF A SOLAR POWERED MULTIPLE CELL PHONES CHARGING BOOTH

ABSTRACT

Cell phones need electric sources to charge their batteries in order to work, but there are people in developing and third world countries that find it hard to access electric sources.In an attempt to provide an alternative means of charging to those unfortunate areas in third world and developing countries, a solar powered cell phone charging booth is to be designed and constructed in this project.

The goal of this project is to create a multiple output solar cell phone chargers for Local areas that found it difficult to charge their phones. The charger takes an input of 12 volts from solar panel and reduces the voltage level to 5 volts output used to charge cell phones.

The design, construction and testing of the solar charger has been achieved and found to work satisfactorily. A cell phone charged at a rate similar to a conventional phone charger and the operation offers a reliable protection for cell phone batteries under charging.

CHAPTER1: INTRODUCTION

1.1 Introduction- - - - - - - - - - 1

1.2 Aim and Objectives- - - - - - - - - 3

1.3 Scope of the Project- - - - - - - - - 3

1.4 Problem Statement- - - - - - - - - 4

1.5 Justification of the Project- - - - - - - - 4

1.6 Thesis Outline-- - - - - - - - - 5

CHAPTER 2: LITERATURE REVIEW 

2.1 Introduction- - - - - - - - - - 7

2.2 Hardware Components- - - - - - - - 82.

2.1 Solar Panel- - - - - - - - - - 82

.2.2 Solar Charger- - - - - - - - - 92.

2.3 USB Port- - - - - - - - - - 102.

2.4 Cell Phone Battery-- - - - - - - - 12

2.3 Components Description- - - - - - - - 13

CHAPTER 3: MATERIALS AND METHODS

3.1Design Requirements-- - - - - - - 19

3.2 Circuit Diagram for the Solar Charger- - - - - - 20

3.3Circuit Analysis- - - - - - - - - 21

3.4List of Components- - - - - - - - - 26

CHAPTER FOURDESIGN ANALYSIS AND CONSTRUCTION

CHAPTER FIVEPROJECT CONSTRUCTION PROCESS AND TESTING

LIST OF FIGURES

Figure                                                                                                     PageFigure 

2.1: USB Connectors- - - - - - - - 

Figure 2.2: Resistors Configurations for USB Pins- - - - -14

Figure 2.3: TL431 Pin Configuration- - - - - - -15Figure 2.4: 7805 Pin out- - - - - - - - 16Figure 2.5:  Voltage Regulator Block Diagram- - - - - 17Figure 2.6: Pin out of LM358- - - - - - - - 18Figure 3.1: The Proposed Circuit Design for Solar Charger- - - 20Figure 3.4: LM358 Connection- - - - - - - 24Figure 4.1: Image of the Circuit on Project Board without battery- - 28Figure 4.2: Image of Circuit on Project Board with Battery- - - 28Figure 4.3: Image of Solar Charger Circuit-- - - - - 29Figure 4.4: Image of Multi-meter used- - - - - 29

Figure 4.5: Solar Charger Circuit Output- - - - - - 30Figure 4.6: Complete Circuit of the Solar Charger- - - - 30Figure 4.7: Image of Soldering iron used- - - - - - 31Figure 4.8: Solar Panel construction casing- - - - - 32Figure 4.9: Front and Back views of the Circuit Construction Casing - 33Figure 4.10: Snap shot of the complete Device with Cell phones connected-- - - - - - - - - - - 33