Smoke Notification System (SNS) Final Presentation Senior Design II November 19, 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 PCB Design

Problem Solution Constraints Technical Practical Testing: System Testing: Design Constraints Package Design Cost of Materials 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 unit will be no larger than 3” x 4” x 3”. 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

Testing: System

Voltage Check

Microphone

Filter

Comparator

Software Alert Unit off Alert Unit on

Software

Testing: Design Constraints

Transmission

Transmission Range (feet) Percent Connectivity (%)

Response Time Test Seconds

Package Design

PCB

Alert Schematic

Alert PCB 2.3” 3.4”

Alert PCB Darlington Pair Power Connector Microcontroller

Packaging Alert Unit

Packaging Final Alert Unit

Packaging

Central Schematic

Central PCB 3.1” 3.3”

Central PCB On/Off Switch Microcontroller Buffer

Central PCB Filter Comparator

Packaging Central Unit

Packaging Final Central Unit

Packaging Final Motor Enclosure

Packaging

Cost of Materials

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

Smoke Notification System (SNS) Questions?