1. Mountain Bike Rallying SDII Mid-Term Presentation September 30, 2008

2. Team Members Frank Holland Firmware PCB Design Packaging Michael Van Java GUI Coding Packaging Andrew Thigpen Java GUI coding Firmware Refinement Packaging

3. Overview Background Problem Solution Constraints Practical Technical Refinements Packaging Testing

4. Background Car Rally Geocaching

5. Problem Bike rider needs a navigator Current GPS units are not suitable for this sport

6. Solution

7. Practical Constraint Sustainability Ruggedness Must be able to withstand a drop from 3 feet

8. Practical Constraint Environmental Operating Conditions Must be water resistant Must withstand temperatures from -20° to 43°C (-4° to 110°F)‏

9. Technical Constraints Tracking Accuracy The GPS must have an accuracy of 5 meters or less. Battery Life The overall product must have at least 6 hours of continuous battery life.

10. Technical Constraints Display Size The display size must be able to hold a minimum of 74 characters on the screen. Example: Current GPS Next GPS Current Time Goal Time Distance

11. Technical Constraints Product Size The product size must 3” x 6” x 3” or less. Product Weight The overall product must be less than 2 lbs.

12. Progress End of Spring Semester Very simple device One mode of operation once turned on Limited display of information

13. Progress Currently Graphics Menu-based operation Variable width characters for more information on the screen

14. Progress Two modes of operation Transfer Mode Race Mode GPS Status Icon Battery Level Icon

15. Progress Helpful dialogs to better inform user Labels provide more information about waypoints Time flashes to indicate goal approaching

16. Progress I2C EEPROM Transfer up to 10 courses GPS data is saved for entire course

17. Progress Map of Recorded GPS Data

18. Schematic

19. PCB Layout

20. Packaging Plastic enclosure Built-in 4AA holder Available protective “boot” for increased ruggedness Fits size constraint 4.94 x 2.75 x 0.94"

21. Tests Battery life with backlight Size meeting with product specification Compatibility across different platforms

22. Battery Life Test Without LCD backlight approximately 10 hours With LCD backlight approximately 8 hours

23. Size Test Size of Enclosure

24. Compatibility Test Windows Vista

25. Compatibility Test Mac OSX Leopard

26. Compatibility Test Ubuntu 7.10

27. Results TestsResults Battery life with backlight Pass Size compared to product specification Pass Software CompatibilityPass

28. More Tests Communication between device and computer System custom course GPS accuracy

29. Communication Test Transferred 180 waypoint course to device Acknowledgement of received waypoint from device Console Output:Oscilloscope:

30. System Test Downloaded event data

31. GPS Accuracy Test Benchmark Tau Beta Pi Monument Actual Coordinate N 33 27.260 W 088 47.320 Measured Coordinate N 33 27.2596 W 088 47.3201 Difference 0.7590 meters

32. More Results TestsResults CommunicationPass SystemPass GPS AccuracyPass

33. Internal Test Clock Signal Strength

34. Physical Test Weight Ruggedness Water resistance

35. Questions?