Development of Portable Charger for Mobile Phone Using
Arduino Microcontroller during Disaster Recovery
Teddy Surya Gunawan, Mira Kartiwi, Nur Ranis Sabrina Suhaimi, Rashidah Abu Bakar
Electrical and Computer Engineering Deportment
Information Systems Deportment
International Islamic University Malaysia
Advisor：趙春棠
Postgraduate：王嘉帷
Outline
Abstract
Introduction
Purpose
Materials and Methods
◦ Energy Harvesting
◦ DC/DC Boost Converter
◦ Intermediate Battery
◦ Li-Ion Charging Circuit using Arduino
 Performance Evaluation
 Conclusions
 References

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Abstract

The objective of this research is to design and develop a
portable charger for mobile phone using Arduino
microcontroller, which can be used effectively during
disaster event.
Introduction
Figure 1. Model of Disaster Recovery Activities
Introduction
Figure 2. The Cause of Telecommunication Failure during Disaster
Introduction

Development of Portable Charger
Figure 3. Design of mechanical and solar powered portable charger
Purpose

In this paper, the intended portable charger will be used
during emergency response as highlighted in Figure 1.
More specifically, the emergency response phase begins
with the search and rescue period and emphasizes
fulfilling the basic needs of individuals.
Materials and Methods
Energy Harvesting
 The energy harvesting part consists of solar and
mechanical power source.
 As shown in Figure 3, the hand crank mechanical system
tested is able to produce between 3 to 4V while the solar
panel tested is able to produce between 3 to 6V.
Materials and Methods
DC/DC Boost Converter
 To charge the 12 V intermediate battery, a DC/DC boost
converter is required to pump up the appropriate voltage.
It is a DC/DC step up voltage converter that will take in a
DC voltage and output a higher DC voltage.
Materials and Methods
DC/DC Boost Converter
Figure 4. DC/DC Boost Converter using LM2577T
Materials and Methods
Intermediate Battery
 Sealed Lead Acid Battery (SLA 密封式鉛酸電池)
 The SLA form is very similar to lead acid battery except
that the electrolyte is in the form of a gel rather than a
liquid. It is basically a maintenance free battery.
Materials and Methods
SLA Battery and Charging Circuit
Figure 5. Basic Charging Circuit for Intermediate Battery
Materials and Methods
SLA Battery and Charging Circuit
 SLA battery employs float charging method in which the
battery is connected to constant-voltage supply
continuously as shown in Figure 5, so that it maintains
the cell in a fully charged condition.
 SLA battery is also the cheapest battery among the other
rechargeable batteries.
Materials and Methods
Li-Ion Charging Circuit using Arduino
 Generally, mobile phone battery using Li-Ion [4] is rated
3.7 volts at 1000 to 1300 mAh while our intermediate
battery, SLA having 12 volt rating with a 0.36 A current.
 The circuit described in Figure 6 provides 7V regulator
voltage and sufficient current for the slow charging of the
mobile phone.
Materials and Methods
Li-Ion Charging Circuit using Arduino
Figure 6. Li-Ion Battery Charging Circuit using Arduino Microcontroller
Materials and Methods
Li-Ion Charging Circuit using Arduino
Figure 7. Flowchart of Li-Ion
Charging Mechanism using Arduino
Performance Evaluation
Performance Evaluation of Mechanical Energy
Figure 8. Testing Performance of Different Types of DC Motor using Hand Drill,
Digital Voltage Meter, and Tachometer
Performance Evaluation
Performance Evaluation of Mechanical Energy
Table 1. Performance of Various Dc Motors
Performance Evaluation
Performance Evaluation of Solar Energy
Figure 9. Testing Performance of Solar Panel in Single, Series, and Parallel
Configurations
Performance Evaluation
Performance Evaluation of Solar Energy
Table 2. Performance of Solar Panels
Performance Evaluation
Figure 10. DC/DC Boost Circuit
Performance Evaluation
Table 3. Charging Time for Li-Ion Battery
Performance Evaluation
Figure 11. Portable Charger Utilizing Arduino Microcontroller
Conclusions

The design of portable charger for mobile phone suitable
during disaster recovery has been presented. The charger
has two power source, mechanical and solar power. Various
DC motors and solar panels have been experimented to
select the best configuration. A DC/DC boost converted
was then used to increase the input voltage from 3V to
around 12 V to charge the intermediate battery. Charging
time for intermediate battery to be fully charged is about 2
hours, while the mobile phone Li-Ion battery requires
about 4 hours to be fully charged.
References
1.
A. M. Townsend and M. L. Moss, "Telecommunications infrastructure in
disasters: preparing cities for crisis communication, " Centre for Catastrophe
Preparedness and Response, New York University 2005.
2.
ITU, Telecommunication Regulation Handbook, International
Telecommunication Union, 2011.
3.
F. Patricelli, J. E. Beakley, A. Carnevale, M. Tarabochia, and D. K. J. E. v.
Lubitz, "Disaster management and mitigation: the telecommunication
infrastructure, " Disasters, vol. 33, pp. 23-27, 2008.
4.
M. Chen and G. A. Rincon-Mora, "Accurate, Compact, and Power-Efficient LiIon Battery Charger Circuit, " IEEE Transactions on Circuits and Systems, vol.
53, pp. 1180-1184, 2006.
5.
C. D. Rahn and C.-Y. Wang, Battery Systems Engineering, Wiley, 2013.
References
6.
A. V. d. Rosa, Fundamentals of Renewable Energy Processes, 3rd Edition,
Academic Press, 2012.
7.
R. J. M. Vullers, R. v. Schaijk, I. Doms, C. V. Hoof, and R. Mertens,
"Micropower energy harvesting, " Solid-State Electronics, vol. 53, pp. 684693, 2009.
8.
J. A. Paradiso and T. Starner, "Energy scavenging for mobile and wireless
electronics, " IEEE Pervasisve Computing, vol. 4, pp. 18-27, 2005.
9.
M. McRoberts, Beginning Arduino, 2nd Edition, Academic Press, 2013.
10.
J. Lopez, M. Gonzalez, J. C. Viera, and C. Blanco, "Fast-Charge in LithiumIon Batteries for Portable Applications, " in 26th Annual International
Telecommunications Energy Conference (INTELEC). Chicago, 2004, pp. 1924.
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