1. StratoBuoy II
Results
Matt Voll
Brian Mayernik
Pat O’Hara

2. Mission Recap
Tested development hardware and software for the power system of the SpaceBuoy nanosat project
Simulated loads (for current/voltage sensing)
Telemetry recorded using IIC interface

3. Pre-flight Modifications
Analog-to-Digital converter failed at some point in final testing. The A-to-D is a critical part of recording telemetry data, so a crucial part of our SHOT II payload
Last minute problems with our 12V - 5V DC converter supply for our CDH board (overheating)

4. Solutions

5. Results
Approximately 2 hours of telemetry data logged, at 1 sample/sec
Less than flight time. What happened?
Batteries still supplying power at recovery
Possible causes:
Faulty connection caused power loss at balloon separation/burst (large ∆v)
Low temps affected exposed power lines (ice build- up)
Still plenty of data to work with

6. Results Continued…

7. 3.3V Reg Voltage vs. Time (s)
* Needs adjustment

9. * Needs adjustment

11. * Needs adjustment

13. * Needs adjustment

14. Lessons Learned Don’t leave things for the last minute
However, always be prepared for things to go
wrong at the last minute

15. Thank You