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

2.  Reasoning:  Advanced detection functions require power  Zero false positives  No unauthorized access  Cannot be powered externally  Safe must stay secure until maintenance

3.  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

4.  Method  Modes of operation  Wake up sensors  Self powered vibration sensors  Low power design  Efficient overall design  No leakage Fig. 1 Piezoelectric vibration sensor [4]

5.  Implementation  Arduino Mega vs Arduino Pro-Mini  Piezoelectric wake-up circuit  Choice of battery  Lithium has highest power density  Sensitive to high temperature  May need a controller

6.  Conclusion  Test two types of batteries  Arduino backpack  Energizer e 2 AA batteries Fig. 2 Arduino backpack [1]

7.  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] “E 2 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