Battery Free Cellphone

BATTERY-FREE CELLPHONE ANAYAT HUSSAIN WANI E&C ENROLL: 4234

CONTENTS 

Introduction.

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Brief History.

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Implementation Implem entation on PCB.

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Speech transmission.

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Speech reception.

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Energy Harvesting.

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Block diagram.

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Power consumption table.

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Calling Capability Capability..

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Future & Conclusion

INTRODUCTION 

Research team from the UW Department of Electrical Engineering and the Allen School of Computer Science & Engineering includes Vamsi Talla (india), Wu Meiling, Sam Crow, Joshua Smith, Bryce Kellogg and Shyam Gollakota (india).

BRIEF HISTORY 

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First cellphone Motorola DynaTAC 8000X, 30 min talk time, charges for ten hrs, cost 4,000$ by Martin cooper. 850 mAh battery, nokia 1100, 250 million phones sold.

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More People In The World Have Mobile Phones Than Toilets.

IMPLEMENTATION ON PCB 

PIFA

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Buttons

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led’s

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Microcontroller 

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RF & photodiode harvester 

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Earphone jack & Microphone

SPEECH TRANSMISSION 

Analog Backscattering.

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Electret microphone.

SPEECH RECEPTION 

A.M receiver.

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Moshi’s Mythro earphones

with high efficiency.

ENERGY HARVESTING 

Photodiode Energy Harvesting

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RF Energy Harvesting

BLOCK DIAGRAM

POWER CONSUMPTION TABLE

CALLING CAPABILITY 

Call setup

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Ongoing Call

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Ending a Call

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Skype Interaction

FUTURE & CONCLUSION 

Power Harvesting.

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Operating Range.

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Networking Multiple Devices.

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Security.

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Display.

VIDEO