1. Mid-Semester Presentation Senior Design I March 1, 2012 Humidity-Activated Bathroom Fan

2. Dontavius Morrissette Programming, Humidity Sensor, Research Dr. Mike Mazzola Team Advisor Chris Fleming Team Technical Leader, Power Circuit and Relaying Brittany Berryman Team Manager, Power Circuit, Wireless Aaron Plunkett Programming, Wireless, Documents Lead, Website John Ayom Programming, Wireless, Team Members

3. Problem Solution Constraints –Technical –Practical System Overview Approach Progress Timeline References 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 System Overview

14. Approach

15. Switching Comparison

16. How It Works: [2]

17. Switching Comparison ProtocolGoodBad RelayUsed for AC and DC circuits Sparking Contacts wear out easily TriacNo operation noise No moving parts to wear out No sparking between contacts Only used for AC circuits [2]

18. Switching Comparison ProtocolGoodBad RelayUsed for AC and DC circuits Sparking Contacts wear out easily TriacNo operation noise No moving parts to wear out No sparking between contacts Only used for AC circuits [2]

19. Triac PartGate Voltage (V)Price ($) Q2004L31.3.85 Q4008L42.252.26 Q4008R42.51.25 Q6015L521.95 [3]

20. Triac PartGate Voltage (V)Price ($) Q2004L31.3.85 Q4008L42.252.26 Q4008R42.51.25 Q6015L521.95 [3]

21. Humidity Sensor

22. How It Works: Capacitive: Consists of a substrate on which a thin film of polymer or metal oxide is deposited between two conductive electrodes Resistive: Consists of metal electrodes deposited on a substrate (silicon, glass, ceramic) Sensor absorbs water vapor and ionic functional groups are dissociated [4]

23. PartAccuracy (%)Response Time (sec) Output HIH-5030±3±35Linear Voltage HIH-4030±3.55Linear Voltage HCH-1000-001±2±215Capacitance Humidity Sensor [3]

24. PartAccuracy (%)Response Time (s) Output HIH-5030±3±35Linear Voltage HIH-4030±3.55Linear Voltage HCH-1000-001±2±215Capacitance Humidity Sensor [3]

25. Wireless

26. Wireless Communication How It Works: ProtocolPowerRange (m)Connection Time 802.11 (Wifi) High50 to 1003s to 5s 802.15.4 (Zigbee) Low10 to 10030ms 802.15 (Bluetooth) Medium1 to 1003s [5]

27. Wireless Communication How It Works: ProtocolPowerRange (m)Connection Time 802.11 (Wifi) High50 to 1003s to 5s 802.15.4 (Zigbee) Low10 to 10030ms 802.15 (Bluetooth) Medium1 to 1003s [5]

28. Wireless PartPower Output (mW) Sleep Current (µA) Wake-Up Time CC2530F32RHAT (Texas Instruments) 102µA4µs XB24-AWI-001 (XBee) 1<502ms RF300 (Synapse Wireless) 100<161.2ms [6] [3]

29. Wireless PartPower Output (mW) Sleep Current (µA) Wake-Up Time CC2530F32RHAT (Texas Instruments) 102µA4µs XB24-AWI-001 (XBee) 1<502ms RF300 (Synapse Wireless) 100<161.2ms [6] [3]

30. Progress and Timeline

31. Ceiling Module 1. Variable voltage is sent to the microcontroller 2. PIC receives analog voltage and sends value to XBee 3. XBee sends wireless data to the control module

32. Wall Module 1. XBee receives data from ceiling module 2. Microcontroller receives value from XBee

33. Output Data 2/23/12 Output from the control module microcontroller Proves successful wireless transmission of data from the ceiling module to the control module

34. Example Code 2/23/12

35. Triac Circuit 2/23/12 The Triac circuit utilizes a low DC voltage to turn switch 120 V AC.

36. Power Circuit

37. Timeline

38. [1] In techMall, February 16, 2012. Retrieved from http://biotechnological/Single-Gang-In-Wall-Junction-Box-S1-18-W- 1G-p/30780.htm [2] “How Dimmer Switches Work,” in howstuffworks, February 18, 2012. Retrieved from http://home.howstuffworks.com/dimmer- switch3.htm [3] In Digikey, February 17, 2012. Retrieved from http://www.digikey.com [4] “Resistance Change Type Humidity Sensor Units with High-Accuracy Detection and Output Control,” in TDK, February 23, 2012. Retrieved from TDK.co.jp/tfl_e/sensor_actuator/CHS/index.html [5] “How does ZigBee compare with other wireless standards?” in Software Technologies Group, February 24, 2012. Retrieved from stg.com/wireless/ZigBee_comp.html [6] “SNAP Components: Synapse RF Engines,” in Synapse, February 24, 2012. Retrieved from synapse-wireless.com/snap-components/rf- engine#docs References

39. Mid-Semester Presentation Senior Design I March 1, 2012 Humidity-Activated Bathroom Fan