1. Smoke Notification System (SNS) Final Presentation Senior Design 1 April 18, 2013

2. Team Members Genetrice Stevenson Electrical Engineering George Wonsley Team Leader Electrical Engineering Richard Matson Electrical Engineering Dr. Raymond Winton Team Advisor Website Hardware Design Wireless Communication PIC Programming Hardware Design Technical Documentation Debugging Technical Documentation Wireless Communication

3. Problem Solution Constraints Technical Practical Testing Subsystems Overall System Prototype Future Tasks Questions

4. Problem and Solution

5. Problem Not every individual has the ability to effectively hear the standard smoke detector signal of 3100 Hz or higher. Individuals with hearing disabilities are the target market group for the SNS.

6. Current Market Current solutions are either too expensive or do not come equipped with all suitable notifications. [1] [2] Gentex Corporation Models available with audible/visual alerts Price Range: $150-$160 Silent Call Models available in pairs: audible/vibration or audible/visual Price Range: $127-$310

7. Solution The SNS aims to address the present limitations of smoke detection systems. Two device system: central unit and alert unit. Designed to work with existing smoke detectors. Incorporates vibration and visual alerts within one product.

8. Technical and Practical Constraints

9. Technical

10. System Overview Power Supply Existing Smoke Detector Microphone Wireless Transmitter Microcontroller Power Supply Wireless Receiver MotorStrobe Light Central UnitAlert Unit

11. Practical Dimensions of the central unit will not exceed 5” x 5” x 3”. Takes up the least amount of space possible Ensures all components fit properly inside the package Alert units will be slightly larger than the standard night- light. Manufacturability : Product Size

12. Practical The SNS must be user friendly and easy to operate. No training or extensive labor to install No maintenance (ex: battery changes) Simply plug both units into wall outlet Usability : Customer Convenience

13. Testing Subsystems & Overall System

14. Microphone Microphone with Smoke Alarm Signal

15. Filter Low Pass Filter with 3.1 kHz Applied

16. Filter Frequency sweep of filter from 6 kHz – 3 kHz.

17. Comparator Output of comparator with smoke alarm signal.

18. Comparator Measurement of pulse width.

19. Transmission

20. Transmission Range (feet) Percent Connectivity (%) 1100 2095 4082 6075 8036 1007

21. Alert Unit 75 feet from central unit2 feet from central unit

22. Alert Unit Alert Unit off Alert Unit on

23. Prototype

24. Prototype Central Unit

25. Prototype ADMP401 Microphone

26. Prototype Central Unit Buffer

27. Prototype Central Unit Sallen-Key Filter

28. Prototype Central Unit Voltage comparator

29. Prototype Central Unit PIC24HJ32GP202

30. Prototype Central Unit Xbee transmitter module

31. Prototype Alert Unit

32. Prototype Xbee receiver module

33. Prototype Alert Unit PIC24HJ32GP202

34. Prototype Alert Unit Strobe light LED

35. Prototype Alert Unit Motor for vibrating device

36. Future Tasks and Timeline

37. Future Tasks Software refinement Redesign filter PCB design Enclosure Testing

38. Timeline AugustSeptemberOctoberNovember Software Refinement PCB Design PCB Populating Enclosure Testing

39. References [1] (2013, February 13). “Audible/Visual Signaling Appliances,” in Fire Protection Products [Online]. Available: http://www.gentex.com/fire/productshttp://www.gentex.com/fire/products [2] (2013, February 13). “Smoke, Fire, & CO Detection,” in Silent Call Communications [Online]. Available: http://www.silentcall.com/catalog/product_info.php?cPath=6&products_id=91&osCsid=527f7fff6fb1379d31318c d94d6d2165 http://www.silentcall.com/catalog/product_info.php?cPath=6&products_id=91&osCsid=527f7fff6fb1379d31318c d94d6d2165

40. Smoke Notification System (SNS) Questions?