1. Design Guide A Batteryless Cell phone 6/20/2006

2. Project Objective Objective Design a practical batteryless cell phone Motivation 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?

3. Project Challenges Which technology to choose Scaling the design to the proper size Meeting proper power and voltage requirement Storing sufficient energy

4. Design Guidelines Understanding the cell phone requirements Choosing a technology Designing the electrical generator Fitting the design mechanically Testing the design Documenting the design

5. Design Guidelines ElectricalMechanical Electrical Design Evaluating mechanical requirement Testing the Design Documenting the Design Power and Voltage Requirements Size and shape requirements Testing the design Documenting the results Cell Phone Requirements Ensuring the electrical can properly fit Modify the design as needed

6. Cell Phone Requirements Electrical Power and voltage requirements per call Power storage requirements Mechanical Phone size Available space

7. Alternative Technologies How to generate electricity Solar Type:  Shine-and-call Advantage: Easy; Small Disadvantage: Needs sun; Works outdoor only Mechanical Types  Shake-and-call  Crank-and-call  Pump-and-call Advantage: More practical Disadvantage: Large size What else? Understanding the technology Basic theory How the technology works Technology limitation Voltage, Power, Current Energy storage technology How much is sufficient How to store energy Power stability Does it always work? Size, durability, reliability, etc.

8. Design Steps Designing the electrical generator Providing sufficient power requirement Offering proper storage capacity Regulating the voltage into the system Offering sufficient stability Implementing the design mechanically How to mount the design on the phone Implementing the design using CAD

9. Testing the Design Reliability Always works! Compatibility Used for different phones Lifetime Storage capacity Durability Handing tolerance Automation Using LabVIEW and DAQ systems

10. Documenting the Design Describing the theory Showing the simulation results Including the CAD plots Design test results Future works and improvements

11. References http://en.wikipedia.org/wiki/Electrical_generator