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WORLD ENGINEERING

CONFERENCE ON SUSTAINABLE

INFRASTRACTURE 2O14

YOUNG ENGINEERS PROGRAMME

ABUJA –NIGERIA 2-7 NOVEMBER 2014

AUTO-RUN CELL

PHONE

‘‘HARNESSING ENERGY WITHIN

THE DEVICE”

UNIVERSITY OF NAIROBI,

KENYA

GEORGE OUMA OTIENO

BSC IN ELECTRICAL AND INFORMATION ENGINEERING

FIFTH YEAR

AUTO-RUN CELLPHONE 05-11-2014 3

ABSTRACT

The Auto-run Cellphone is a project that addresses the issue of quick battery

discharge in smartphones due to the many applications that run. The project solves this generating electrical energy for charging while mobile is being used.

This is achieved by a pretty small wireless device that is mounted at the back of

the phone to act as a charger. It uses energy from the radiation caused by the

Radiofrequency from the Base Transceiver Station (BTS) while communication is taking place. The device does the conversion and regulation of the Voltage and

Current to achieve mobile charging specifications.

AUTO-RUN CELLPHONE 05-11-2014 4

• Scope

• Methodology

• Discussion

• Technology

• World Population

• Energy

• The General Picture

• Communication Process

• Mobile Site

Contents

• The Idea

• The Process

• First Prototype

• Beneficiaries

• Advantages

• Challenges

• Cost Benefit Analysis

• Conclusion

AUTO-RUN CELLPHONE 05-11-2014 5

Scope

• Energy Consumption for charging mobile phones in Africa

• Alternative and sustainable mobile phone charging for reduced energy consumption

• Generating 2W-5W range of electrical power for charging

• Prototype and its operation

AUTO-RUN CELLPHONE 05-11-2014 6

Methodology

Detection of the radio frequency waves

Converting the radio frequency to electrical energy using the device monopole antenna

Stabilization or regulation to universal standard of 4-6V, 100mA-1000mA

Connection to charging system

AUTO-RUN CELLPHONE 05-11-2014 7

AUTO-RUN CELLPHONE

Discussion

05-11-2014 8

• Living in the age of: -

• Cellphones

• Tablet

• Hand-held devices

• Computers

• Wireless Devices

Technology

AUTO-RUN CELLPHONE 05-11-2014 9

World Population

• 7.125billion people in the world in 2013 (Source: World Bank)

• Population Growth Rate projected to be 1.2% annually

• Africa’s Population is 2 nd largest in the World after Asia.

• Africa has 15% of the world’s population, approximately 1.068billion people

AUTO-RUN CELLPHONE 05-11-2014 10

Energy

• Technology requires energy to drive it.

• Main source of energy in Africa is Electrical Energy.

• Other sources of power – solar, wind – currently expensive and out of reach of most.

• Power Generation in Africa mainly Hydro and Geothermal

• Global warming has affected weather patterns which has affected power generation

• This leads to inadequate power generation therefore most countries in Africa experience, Black Outs, Power Rationing, etc

AUTO-RUN CELLPHONE 05-11-2014 11

Energy Cont’…

• Assuming 70% of Africa’s Population each has a mobile device

• 70% of 1.068billion = 0.75billion people

• Maximum Power required to charge a mobile phone is approximately 5W

• Therefore, total power required for charging is: -

• 0.75billion * 5W = 3.75GW

• Demand is too HIGH!

• Alternative means of charging phones needs to be found.

AUTO-RUN CELLPHONE 05-11-2014 12

The General Picture

Electrical energy is a precious commodity that needs to be

CONSERVED at all costs.

Alternative, Sustainable and Affordable means of charging cell phones in Africa must be found.

HARNESSING radiofrequency waves; CONVERT to electrical energy; REGULATING the energy; CHARGING of cellphone.

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Communication Process

AUTO-RUN CELLPHONE 05-11-2014 14

AUTO-RUN CELLPHONE

Mobile Site

05-11-2014 15

The Idea

 The principle behind this invention is based on harnessing the radiated electromagnetic waves from the cellphone antenna

 Formation of magnetic field around the antenna will lead to generation of electrical energy

 The electrical energy generated is the power that charges your cell phone

AUTO-RUN CELLPHONE 05-11-2014 16

The Idea

cont’...

 Not all radio frequency waves are to be converted, just about 70% of it.

 The charging takes place when you: -

• receive a call

• make a call

• send a text and

• while browsing

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AUTO-RUN CELLPHONE

Process Summary

Detection of Radio

Frequency

Conversion &

Regulation

Charging

(connection to charging system)

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Findings

ITEM

1 st Prototype

VOLTAGE, V

4

CURRENT, mA

225

POWER, W

0.9

REMARKS

Insufficient

2 nd Prototype 5 400 2 Sufficient

AUTO-RUN CELLPHONE 05-11-2014 19

Beneficiaries

 Mobile Phone Users.

 Hand Held Computers.

 Any wireless communication device

AUTO-RUN CELLPHONE 05-11-2014 20

Advantages

 No charger required.

 Gives your phone energy especially when you need.

 Your phone can run for a good number of days without ac plug in.

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Challenges

 Some mobile phones are not compatible with this system.( more research)

 Efficiency reduction in some mobile phone devices.

 Causes overheating in other phone devices ( Motorola, Huawei)

AUTO-RUN CELLPHONE 05-11-2014 22

AUTO-RUN CELLPHONE

Cost Benefit Analysis

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ITEM DESCRIPTION QTY UNIT

COST

(KSHS)

1 Hardware Design

2 Hardware Fabrication

3 Scaling of Prototype

1

1

1

Lot

Lot

Lot

TOTAL COST

Assuming $1 = KSHS. 87.00, Total Cost

1,000.00

800.00

500.00

AMOUNT

1,000.00

800.00

500.00

2,300.00

$26.00

AUTO-RUN CELLPHONE 05-11-2014 24

Conclusions

• Cost of Energy Generation and Consumption in Africa is high.

• With Alternative, Affordable and Sustainable means of charging cellphones, the energy can be diverted to other uses.

• The Auto-run Cellphone invention will ensure energy is sustained, conserved and is affordable to most.

AUTO-RUN CELLPHONE 05-11-2014 25

AUTO-RUN CELLPHONE

THANK YOU

Email: georgeouma07@gmail.com

Mobile: +254713062731

05-11-2014 26

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