Application of Three Independent Sources to Mobile Phone Charging During Emergencies

  • Azuka Affam
  • Rosmiwati Mohd-MokhtarEmail author
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 547)


In this paper, the amalgamation of three input power sources as a charging tool for phones and low power communication devices is presented. The developed system comprises a human powered dynamo, solar panels to harvest energy from the sun and a rechargeable battery supply. A simple switching mechanism is incorporated to switch between respective sources. A common dc-dc regulation circuit adjusts the vacillating input voltages to satisfy phone and communication device charging voltage specification. The multi-source system eliminates the effect of periodic variation and unavailability of any of the input sources in event of a need for emergency device charging and demonstrates the potential to power or charge a phone.


Phone battery charging Multi-source Energy harvesting 



This work has been supported by FRGS Grant: 203/PELECT/6071291.


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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.School of Electrical & Electronic EngineeringUniversiti Sains MalaysiaNibong TebalMalaysia

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