Transcript Design Guide

Design Guide
A Batteryless Cell phone
6/20/2006
Project Objective
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Objective
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Design a practical batteryless cell phone
Motivation
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Take your cell phone anywhere for any length of
time and never worry about recharging it
Never allow your cell phone to run out of battery
Never bother with your phone charger
Got interested?
Project Challenges
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Which technology to choose
Scaling the design to the proper size
Meeting proper power and voltage
requirement
Storing sufficient energy
Design Guidelines
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Understanding the cell phone requirements
Choosing a technology
Designing the electrical generator
Fitting the design mechanically
Testing the design
Documenting the design
Design Guidelines
Cell Phone Requirements
Power and
Voltage
Requirements
Electrical
Electrical
Design
Size and shape
requirements
Mechanical
Evaluating mechanical
requirement
Testing the
design
Ensuring the
electrical can
properly fit
Testing the
Design
Modify the
design as
needed
Documenting
the results
Documenting the
Design
Cell Phone Requirements
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Electrical
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Power and voltage requirements per call
Power storage requirements
Mechanical
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Phone size
Available space
Alternative Technologies
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How to generate electricity
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Solar
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Shine-and-call
Advantage: Easy; Small
Disadvantage: Needs sun;
Works outdoor only
Types
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Shake-and-call
Crank-and-call
Pump-and-call
Advantage: More practical
Disadvantage: Large size
What else?
Basic theory
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How much is sufficient
How to store energy
Power stability
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Voltage, Power, Current
Energy storage technology
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How the technology works
Technology limitation
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Mechanical
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Understanding the technology
Type:
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Does it always work?
Size, durability, reliability, etc.
Design Steps
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Designing the electrical generator
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Providing sufficient power requirement
Offering proper storage capacity
Regulating the voltage into the system
Offering sufficient stability
Implementing the design mechanically
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How to mount the design on the phone
Implementing the design using CAD
Testing the Design
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Reliability
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Compatibility
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Storage capacity
Durability
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Used for different phones
Lifetime
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Always works!
Handing tolerance
Automation
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Using LabVIEW and DAQ systems
Documenting the Design
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Describing the theory
Showing the simulation results
Including the CAD plots
Design test results
Future works and improvements
References
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http://en.wikipedia.org/wiki/Electrical_generator