1. Workshop Designing a Batteryless Cell Phone Introduction Dr. Farid Farahmand 9/26/2006

2. Overview Welcome! What it means to be here! Design process Designing a batteryless cell phone Deadlines and rules References

3. Why Participate? Become a professional – A real-world project can provide a transition from being a student to becoming a professional Be recognized by the Dean’s office and offer university representatives Use this ass your capstone project Gain a chance to improve your knowledge and skills – Learn to apply your knowledge to real problems – Have the opportunity to work in a team and learn from your peers – Challenge your skills and abilities – Learn how to take responsibility for your successes and mistakes – Understand a real design cycle – Add this experience to your resume Employers hire students with real working skills!

4. Why Participate? Just to win $1500!

5. Design Process Design is an iterative process with iterative phases Methodology: Learning about the problem and picking a solution – Decision-making and planning – Problem solving Objective: Creation of something new having a physical reality – Functional – Safe – Reliable – Competitive – Usable – Manufacturability – Marketable Learn how to design (subject to certain problem solving constraints) a component (system or process) that performs a specific task (subject to certain solution constraints) optimally.

6. Designers’ Personal Resources Creativity and talent Problem-solving ability Effective communication Willingness to learn Science (Explaining what is) Engineering (Creating what never was) Mathematics U r Here!

7. Starting a Design Process Necessity is the mother of all inventions – what is wrong with existing solutions What are you going to do about it? Invention of the concept / comparing the competitive solutions / finding the most competitive approach Necessity is the mother of all inventions – what is wrong with existing solutions To optimize we use mathematical models to describe the physical attributes and characteristics Evaluation is proof of concept / prototyping If you cannot explain it, it does not exist!

8. Starting a Design Process Design Considerations Design Tools & Resources Systematic Design Approach YOU! Understanding the problem Identifying what are known and unknown Stating all decisions Analyzing the problem Evaluating the solution Presenting the solution Characteristics that influence the design Reliability Manufacturability Weight Cost Lifetime Safety Functionality and usability Style Shape and size Characterizing the behavior of the design - Matlab - Labview - Books and online resources - CAD tools

9. 1. Identify need and define problem. 2. Assemble design team. 3. Identify constraints and criteria for success. 5. Analyze potential solutions. 6. Decide on best solution. 7. Document and communicate to management. 8. Build. 9. Evaluate 4. Search for potential solutions. Design Process

10. Systematic Design Approach Understanding the problem Identifying what are known and unknown Stating all decisions Analyzing the problem Evaluating the solution Presenting the solution

11. Systematic Design Approach Understanding the problem – What is the nature of the problem Identifying what are known and unknown – How the cell phone is powered – Testing characteristics of the cell phone – Size of the design and its interface to the phone – Power requirement of the phone – Cost constraints Understanding the problem Identifying what are known and unknown Stating all decisions Analyzing the problem Evaluating the solution Presenting the solution

12. Systematic Design Approach Analyzing the problem – Basic functional blocks of the design – Check advantages and disadvantages of each possible solutions – Verify each solution using simulation and modeling Evaluating the solution – Prototyping Presenting the solution – Explain what you did! Understanding the problem Identifying what are known and unknown Stating all decisions Analyzing the problem Evaluating the solution Presenting the solution

13. Design Process 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

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

15. Cell Phone Characterization Cell Phone Power Source Voltage Current Computer Test ConditionVoltage/CurrentPower Receive a call Dial a number 30 second conversation Turn on Time Current Time Power

16. Basic Design Solution Energy Generator Electrical Storage Cell Phone Solar-based Mechanical-based Chemical-based Capacitors Active devices Any cell phone

17. Basic Design Solution Energy Generator Electrical Storage Cell Phone Solar-based Mechanical-based Chemical-based Capacitors Active devices Any cell phone Examples: Shake-and-talk Blow-and-talk Move-and-talk Crank-and-talk

18. Basic Design Solution Energy Generator Electrical Storage Cell Phone Solar-based Mechanical-based Chemical-based Capacitors Active devices Any cell phone Characterization: Power generated Current supply Voltage supply Reliability Size / Weight / etc. Characterization: Storage capacity Lifetime Charging and discharging time Min/Max Charge

19. Now What? Anyone can participate – Signup the registration sheet – Attend the workshops – Check the web page for updates Put a team together and pick a cool name! – Let me know what you need – Prepare a schedule indicating your projected times to complete each Milestone – You can start your own web page Attend the workshops Remember the deadlines

20. Finalists The best design selection criteria – Reliability: Always works! – Compatibility: Used for different phones – Lifetime: Storage capacity – Durability: Handing unexpected – Completeness: Create a poster Describe the theory Show the simulation results Show the test results Explain future works and improvements Remember: Anyone with a prototype is a winner!

21. What Else? Any Questions?