1. Traffic Light Dashboard Display ECE 411 Practicum Project Joe Davis (EE: Analog) Russell Ellis (EE: Analog) JJ Hartley (CE: Computer HW) David Dang (EE: Analog)

3. Problem Or Need • Traffic lights can frequently be difficult to see • In front of the sun. • Blocked by large vehicles. • Lights behind sharp turns.

4. Motivation • According to NHTSA in 2008* • ~800k intersection related traffic accidents • Majority (>50%) of these accidents attributed to traffic light recognition errors • >7400 were fatal • Increase Traffic Safety • Save Lives! * NHTSA. (2010). “Crash factors in Intersection-Related Crashes: An On-Scene Perspective”. DOT HS 811 366. Washington, DC: National Highway Traffic Safety Administration.

5. Objective • Create a dashboard mounted device that displays relevant traffic light information. • Current light state • Amount of time left for relevant light state • Proof of concept design, not a complete solution!

6. Requirements • Should display accurately and be simple to understand • Low Cost/Power Consumption • Durable/Reliable • Safe, easy to use • Should be able to fit and operate in a vehicle • Software should be easy/readily available.

7. Alternatives • Google utilizes a related design in its driverless car.* • Still susceptible to line of sight • Requires extensive optical algorithms • NHTSA is researching options * Crider, Michael (2012-05-09). Back To Basics: How Google’s Driverless Car Stays On The Road. Slashgear.

8. Approach • Universal Design • Develop a transmitting board that simulates traffic light • Develop receiving board that displays traffic light information sent from transmitting board

9. Development Tools • PCB123 • Atmel Studio 6.0 environment

10. Hardware Design

11. Hardware Design

12. Hardware Design

14. Bill Of Materials

15. Software Design main: setup ports and USART loop1: read and store DIP Switches set changedDIP = 0 store testMode, dash, and streetSelect values loop2: if testMode examine DIP Switch values stored, execute test number else if dash read from USART if byte matches streetSelect display info recieved else //this is streetlight run FSM logic transmit state over USART if DIP Switches changed goto loop1 else goto loop2

16. Software Design Software Design

17. Software Design

18. Software Design

19. Software Design

21. Software Design

22. Software Design

23. IP and Prior Work • Utilized open source code from datasheets

24. Testing • Correct function of individual components • Correct S/W implementation • S/W & H/W test cases • Correct functioning of communications between transmitter/receiver • Power consumption testing • Testing Modes

25. Hardware Design

26. Results/Demonstration • Everything works!

27. Contributions • Joe Davis – Schematic/Layout, SW/HW debug • JJ Hartley – Software design, Layout, SW/HW debug • David Dang – Testing/documentation, SW/HW debug • Russell Ellis – Decoder prototyping, SW/HW debug

28. Lessons Learned • PCB Layout design • Wireless is hard • Order surplus parts • AVR programming • JTAG fuses

29. Q&A

30. Back-up

31. Patent