Group Members: Steven Paradise, Patrick Schindler, Dr. Behrouz Farhang, Arslan Majid, Chril Miller, David Brown, and Joshua Hamilton

By Joshua Hamilton

Reasoning: Advanced detection functions require

powerZero false positivesNo unauthorized access

Cannot be powered externally Safe must stay secure until maintenance

Requirements of power source Necessary 1 year lifespan with a goal of 2 Cannot be tampered Power detection sensors Safely power the Arduino controller Dependable

Method Modes of operation Wake up sensors

Self powered vibration sensors Low power design

Efficient overall designNo leakage

Fig. 1 Piezoelectric vibration sensor [4]

Implementation Arduino Mega vs Arduino Pro-Mini Piezoelectric wake-up circuit Choice of battery

Lithium has highest power density Sensitive to high temperatureMay need a controller

Conclusion Test two types of batteries

Arduino backpackEnergizer e2 AA batteries

Fig. 2 Arduino backpack [1]

Contact Information: Joshua Hamilton ECE Department, University of Utah Jham111@hotmail.com

Sources: [1] “Lithium Backpack”, Apr. 8, 2010. [Online]. Available:http://www.liquidware.com/shop/show/BP/Lithium+Backpack[2] “E2 Datasheet”, Apr. 8, 2010. [Online]. Available:http://Energizer-L91BP-8-Lithium-Battery-8-Pack/dp/B0000DC4EL[3] “Arduino Pro Mini”, Apr. 8, 2010. [Online]. Available:http://www.sparkfun.com/commerce/product_info.php?products_id=9220[4] “Vibration Sensor/Switch” ,Apr. 8, 2010. [Online]Available:http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=MSP1007-ND