Smoke Notification System (SNS) Mid-Semester Presentation Senior Design 1 February 28, 2013

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

Problem Solution Constraints Technical Practical Approach Progress Timeline Questions

Problem and Solution

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.

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

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.

Technical and Practical Constraints

Technical

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

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

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

Approach

Wireless Communication NameModelRangePriceChoice Synapse RF Module RF100pD feet (305 m) $44.33 Xbee 1mW Chip Antenna Series 1 ( ) 100 feet (30 m) $19.95

Microphone ADMP401 Omni-directional High Signal-to-Noise Ratio (62 dBA) Frequency Range : 60 Hz – 15 kHZ [3]

Microprocessor PIC24HJ32GP [4] Low Cost Team Experience Pulse Width Modulation

Progress and Timeline

Progress: Breadboard

Deliyannis-Friend Biquad Filter

Progress: Breadboard ADMP401 Microphone

Progress: Simulation Frequency Response Peak

Timeline JanuaryFebruaryMarchApril Research Design Coding Prototype Assembly Testing and Debugging

References [1] (2013, February 13). “Audible/Visual Signaling Appliances,” in Fire Protection Products [Online]. Available: [2] (2013, February 13). “Smoke, Fire, & CO Detection,” in Silent Call Communications [Online]. Available: d94d6d d94d6d2165 [3] (2013, February 20). “Breakout Board for ADMP401 MEMS Microphone,” in RobotSimple [Online]. Available: [4] (2013, February 20). “PIC Microcontrollers and Projects,” in Ensemble [Online]. Available:

Smoke Notification System (SNS) Questions?