1. Final Presentation Senior Design I April 19, 2012 Humidity-Activated Bathroom Fan

2. Dontavius Morrissette Computer Engineering Dr. Mike Mazzola Team Advisor Chris Fleming Electrical Engineer Brittany Berryman Electrical Engineer Aaron Plunkett Electrical Engineer Computer Engineer John Ayom Electrical Engineer Team Members

3. Problem Solution Constraints –Technical –Practical System Overview Physical View Circuit Construction Testing Senior Design II Questions/Comments Presentation Overview

4. Problem and Solution

5. Issues with high humidity in the bathroom: Uncomfortable environment Structural damage Mold Problem

6. Humidity-Activated Bathroom Fan Two device system: wall (control) and ceiling module Calibrates and sets initial humidity settings for room After humidity exceeds 15% of initial calibration, the fan will turn on When room returns to the calibrated level, the fan will turn off Pushbutton will allow for user override Solution

7. Technical and Practical Constraints

8. NameDescription Humidity ResistanceThe wireless ceiling module must be able to withstand up to 100% humidity. Activation AccuracyThe HABF is activated when the humidity reaches ±5% of the user set level. Wireless TransmissionThe system must have wireless range of at least 30 feet. Supply PowerThe control module must operate from 120VAC/60Hz. Device PowerThe ceiling module is battery operated with an estimated battery life of no less than 1 year. Technical Constraints

9. TypeNameDescription ManufacturabilitySizeThe HABF control module must fit within a single- gang electrical junction box. SustainabilityMaintenanceThe HABF system must require almost no user interaction or maintenance. Practical Constraints

10. Manufacturability: Size The HABF control module must not exceed 2-1/4"(W) x 3- 3/4"(L) x 3-1/4"(D). This will allow the HABF to: Fit in to a typical single gang junction box Replace existing fan switch Practical Constraints [1]

11. Sustainability: Maintenance The HABF must require limited user interaction relating to device maintenance. Practical Constraints

12. 2/23/12 System Overview

13. Control Module Ceiling Module

14. 2/23/12 Circuit Construction

15. Control Module Manual Override Pushbutton Microprocessor Xbee Transceiver Heartbeat LED

16. External Circuits Switching Circuit Power Control Circuit

17. Ceiling Module Battery External Timer Circuit Humidity Sensor Microprocessor PIC24FJ16GA002 XBee Transceiver Sleep Indicator LED

18. Physical View

19. 2/23/12 Testing

20. Wireless Transmission Wireless Range of 35ft

21. Humidity Sensor Activation

22. Humidity vs. Output Voltage

23. [2]

24. HABF Test Setup

26. 2/23/12 Senior Design II

27. 2/23/12 Future Tasks PCB Design Wall Module Enclosure Control Module User Interface Low-Battery Indicator User Variability Low-Current Part Replacements

28. 2/23/12 Senior Design II Timeline AugustSeptemberOctoberNovember PCB Design PCB Populating Testing Wall Module Enclosure Ceiling Module Enclosure

29. [1] In techMall, February 16, 2012. Retrieved from http://biotechnological/Single-Gang-In- Wall-Junction-Box-S1-18-W-1G-p/30780.htm [2] Honeywell. “HIH-5030/5031 Series Low Voltage Humidity Sensors”, in Digi-Key. Retrieved from http://www.digikey.com/ References

30. Final Presentation Senior Design I April 19, 2012 Humidity-Activated Bathroom Fan