1. Fabrication Of A Wireless Sensor Network for Extreme Environments Faye Yuen EE 496 / NASA Fellowship Design Review Presentation 1 Fall 2006

2. Project Overview Create network of autonomous motes to collect data in extreme environments (i.e. Antarctica) that analog Mars. Contribute to Dr. Chris McKay’s research. Meet NASA goals.

3. Overall Block Diagram External Renewable Power Source Water Sensor JN5121 Wireless Microcontroller Computer

4. External Power Supply + + — — Solar Module Diode 2.5 mm Jack Socket (to JN5121 Mircrocontroller)

5. External Power Supply: Components Flexible Thin Solar Modules Schottky Diodes 24+ Gauge Wire Rechargeable NiMH Batteries 2.5 mm Jack Socket

6. External Power Supply: Tests Measure overall cell efficiency and voltage/current characteristics AM1.5 solar simulated light at different temperatures Determine how the solar cell responds to different sunlight Quantum efficiency at different cell biases

7. Remaining Work Water Sensor Building external power supply Documentation

8. Potential Problems Finding a purchasable water sensor (if not, designing one) TIME MANAGEMENT!

9. Timeline for Completion October 20 – Test network range and sensors. October 25 – Decide on Water Sensor. October 30 – Complete Mid-Semester Report. November 1 – Complete 1 st Draft of 496 Report. November 11 – External power supply built. November 18 – NASA Presentation, EE 496 Design Review 2. November 25 – Water Sensor built (if not bought). December 1 – Test Water Sensor. December 10 – Complete 496 Report.

10. Gantt Chart

11. Questions?