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Design Guide A Batteryless Cell phone 6/20/2006 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? Project Challenges Which technology to choose Scaling the design to the proper size Meeting proper power and voltage requirement Storing sufficient energy Design Guidelines 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 Electrical Power and voltage requirements per call Power storage requirements Mechanical Phone size Available space Alternative Technologies How to generate electricity Solar Shine-and-call Advantage: Easy; Small Disadvantage: Needs sun; Works outdoor only Types Shake-and-call Crank-and-call Pump-and-call Advantage: More practical Disadvantage: Large size What else? Basic theory How much is sufficient How to store energy Power stability Voltage, Power, Current Energy storage technology How the technology works Technology limitation Mechanical Understanding the technology Type: Does it always work? Size, durability, reliability, etc. 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 Testing the Design Reliability Compatibility Storage capacity Durability Used for different phones Lifetime Always works! Handing tolerance Automation Using LabVIEW and DAQ systems Documenting the Design Describing the theory Showing the simulation results Including the CAD plots Design test results Future works and improvements References http://en.wikipedia.org/wiki/Electrical_generator