1. Track Timer Mid-Semester Presentation Senior Design II October 4, 2011

2. Team Members Jonathan Moorhead Computer Engineering Enclosure Keypad Interface Chad Pumphrey Computer Engineering VDIP LCD Interface Michael Nguyen Electrical Engineering Timing Accuracy VDIP John Rose Electrical Engineering VDIP Power System

3. Advisor Dr. Follett Assistant Professor

4. Overview Background Problem Solution Constraints ◦ Technical ◦ Practical Progress and Refinements Packaging Testing Plan Production Questions/Comments

5. Background Starkville High School has previously had to borrow timing systems for their races. Even today, they do not have a timing system for practical and competitive usage. Dr. Follett has experience with timing devices.

6. Problem Timing Systems cost over $500. The thermal printer and the recurring cost of thermal paper. High School’s Physical Education program cannot afford this type of equipment.

7. Solution To develop a cost effective timing system for high school and other teams with limited budgets. Replace Thermal printer with removable non-volatile media.

8. Hardware Block Diagram Plunger Inputs Keypad Display Microcontroller Storage Power Supply External Timer

9. Technical Constraints NameDescription Timing Accuracy Timer must have an accuracy of 0.01 seconds after 10 minutes of continuous running. Battery lifeBatteries must operate for at least 12 hours. Display Characteristics Display must be visible in mild outdoor conditions. Push Button Push Buttons must be a single momentary switch, and their cords must be at least 12 feet in length or more. Data StorageMemory must store at least 8,000 times.

10. Practical Constraints TypeNameDescription EconomicCost Total prototyping price must be under $400.00. EnvironmentalOperating ConditionsThe Track Timer must be weather resistant.

11. The Competition, Sprint8 price $969.00 [1]. The Track Timer has taken less than $400.00 to prototype. Economic

12. Environmental Intended for outdoor usage. Must be Weather Resistant.

13. Progress and Refinements PCB Refinements Enclosure Software Conducting field test with Starkville High School

14. PCB Refinements Incorporated via restriction box. Added 2 PMOS for USB Storage Hosts. Added Voltage Regulators

15. Enclosure Modified a Pre-Made Enclosure Laser Printer ◦ Model A ◦ Model B 3-D Printer

16. Software  Refined the de-bounce, and delays.  Added ADC for Battery Voltage Sensor.  Incorporated reading from the status bit.  Incorporated writing the entire list from the buffer.

17. Packaging All Inclusive ◦ TrackTimer Device ◦ 8 RJ11 Plungers ◦ 2 Mini-USB drives (4GB/each) ◦ 4 AA Batteries ◦ User Manual Software w/ Barcode Scanner ◦ Meet Manager

18. Testing Plan Track & Cross-Country USB drive malfunction check Accuracy Test Time-Position Matchup on Computer Report Battery Life Durability Test LCD Visibility

19. Testing Data Synchronous, Start 1 32 - Accuracy Test

20. Battery Life

21. Field Testing - Events September 29, 2011 – Initial Field Testing October 22, 2011 - Starkville High School Hosts a Cross-Country Meet. October 29, 2011 - Run for Education

22. Production Track Timer is a one unit device ◦ Sell Plungers separately ◦ Replacement USB Drives available for purchase ◦ Batch-order 50 units initially

23. Parts List [2]

24. Reference [1] Stopwatch Central.”Sprint Timing Systems” Sprint 8 Track Package. 2011. http://www.stopwatchcentral.com/sprint/sprint.htm http://www.stopwatchcentral.com/sprint/sprint.htm [2] www.Digi-key.comwww.Digi-key.com

25. Questions