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Sam Dodge Mentored by Dr. Tom Sharp. Electronics System. Arduino Microcontroller. Programmable in C 6 Analog Inputs/Outputs, 15 Digital Inputs/Outputs A multiplexer was used to extend the number of analog pins to 13 Records time. OpenLog Data Logger. Connects to arduino serial pins

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Sam dodge mentored by dr tom sharp

Sam Dodge

Mentored by Dr. Tom Sharp

Electronics System


Arduino microcontroller
Arduino Microcontroller

  • Programmable in C

  • 6 Analog Inputs/Outputs, 15 Digital Inputs/Outputs

  • A multiplexer was used to extend the number of analog pins to 13

  • Records time


Openlog data logger
OpenLog Data Logger

  • Connects to arduino serial pins

  • Writes to a standard text file


Sensors
Sensors

  • Humidity Sensors

  • 2 Gas Sensors

  • 3 Axis Accelerometer

  • Pressure Sensor

  • 2 Temperature Sensors

  • Geiger Counter


Camera control
Camera Control

  • Still camera takes a picture every 8 seconds

  • Video camera takes 10 minute video clips to prevent from turning off

  • Both are controlled by digital pins


Post launch data processing
Post Launch Data Processing

  • File from data logger can be imported into excel for analysis

  • MATLAB was also used to analyze the results



Problems
Problems

  • Battery enclosure on camera

  • Voltage Regulator

  • Low batteries

  • Arduino physical reset switch

  • Voltage on arduino pins controlling digital sensors



Circuit board etching
Circuit Board Etching

  • Less dependant on wire connections

  • A more reliable design would use one board rather than two

  • Can’t be easily changed


Better cameras
Better Cameras

  • Video Camera

  • Still Camera

    • Some cameras can be hacked to take pictures by themselves at a set time interval

  • With better cameras, they can be isolated from the rest of the system


Other
Other

  • Better Testing

  • Redundant Power Systems

    • Is redundancy worth the extra weight?

  • Complexity vs Reliability


Future additions
Future Additions

  • Photodiodes

  • More reliable sensors

  • Different sensors

  • Working Video Camera