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ECE 477 Final Presentation Team 5  Spring 2014

ECE 477 Final Presentation Team 5  Spring 2014. Dan Nesnidal Robert Wayner Willis Banks Emily-Rose Lightowlers. Outline. Project overview Block diagram Design challenges Individual contributions Project demonstration Questions / discussion. Project Overview.

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ECE 477 Final Presentation Team 5  Spring 2014

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  1. ECE 477 Final Presentation Team 5  Spring 2014 Dan Nesnidal Robert Wayner Willis Banks Emily-Rose Lightowlers

  2. Outline • Project overview • Block diagram • Design challenges • Individual contributions • Project demonstration • Questions / discussion

  3. Project Overview • Use the PIC microcontroller to monitor refrigerator temperature, humidity, and air quality • A Raspberry Pi will receive the refrigerator status wirelessly from the microcontroller • A touch screen controlled by the Pi will display status information, and manage refrigerator inventory

  4. Block Diagram

  5. Design Challenges • Honeywell Humidicon I2C Temperature Sensor issues • False readings from board heat • MQ-2 Methane Sensor heating element • Careful board placement and testing

  6. Design Challenges • RN-41 Bluetooth Chip • Most complex device on board • Use of shield versus individual chip

  7. Design Challenges • Power Considerations • BJT switches to toggle sensors • 9V final battery • ATD power monitoring

  8. Individual Contributions • Team Leader – Emily-Rose Lightowlers • Team Member 2 – Dan Nesnidal • Team Member 3 – Bob Wayner • Team Member 4 – Willis Banks

  9. Team Leader – Emily-Rose • Initial Power Supply • Power supply for PCB • Research • Survey • Database • Final block diagram/documentation

  10. Member 2 - Dan • Microcontroller development • Prototyping sensors and wireless • Programming PIC drivers • Initial PCB and schematic design

  11. Member 3 - Bob • Initial/Final PCB schematic • Made microcontroller symbol from scratch • Utilized wireless connections to reduce clutter. • All soldering connections on PCB • Enclosures designed and produced • Main box: foam board material • Microcontroller box: ABS plastic

  12. Member 4 - Willis • Raspberry Pi Development • Database creation • GUI Design • Part Testing • Methane time characteristics • RF receiver testing • Power circuit additions

  13. Project Demonstration • An ability to communicate with an auxiliary microcontroller wirelessly • An ability to monitor battery state of the microcontroller • An ability to decode sensor data and create condition alerts using the microcontroller • An ability to output to an LCD and take in touchscreen data • An ability to modify a food database by user input

  14. Questions / Discussion

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