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ECE 477 Final Presentation Team 13  Spring 2008

ECE 477 Final Presentation Team 13  Spring 2008. Varun Srichand Anvesh Madhu. Outline. Project overview Block diagram Design challenges Project demonstration Individual contributions Questions / discussion. Project Overview.

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ECE 477 Final Presentation Team 13  Spring 2008

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  1. ECE 477 Final Presentation Team 13  Spring 2008 Varun Srichand Anvesh Madhu

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

  3. Project Overview • An ordering system where the user will be able to order and pay for the food from the comfort of the table • Consists of a touch screen monitor which displays the menu and allows the user to select the items • The order sent through a wireless interface is received by the host computer • The bill can be paid at the table using an RFID gift card

  4. Block Diagram

  5. Design Challenges • Adding the battery circuit • Huge changes in schematic • Completely new PCB layout • Building and testing the charger circuit • An error in initial circuit • Mismatch of PCB footprint • Testing the functionality of the Battery monitoring circuit • I2C interface

  6. Design Challenges Carefully designing and populating the PCB to avoid damage Many expensive parts Damaged the wireless transceiver twice PCB Layout Learn Layout Plus Revise the layout twice

  7. Project Demonstration • An ability to display information (menus, items ordered, etc.) on an LCD. • An ability to enter choices and select functions via touch screen entry. • An ability to read an RFID card and use decoded user ID to look up personal account information. • An ability to transmit menu choices over a  wireless interface • An ability to charge the batteries using a charger circuit.

  8. PSSC Demo Demonstration Video

  9. Individual Contributions • Team Leader – Anvesh Dasari • Team Member 2 – Srichand Yella • Team Member 3 – Varun Vallabhaneni • Team Member 4 – Madhu Tummala

  10. Team Leader – Anvesh Dasari • Researched ZigBee Transceiver and Battery Charger • Designed the circuit for Battery charger • Interfacing Battery Fuel Gauge and Touch screen to Microcontroller • Software coding for Microcontroller • Hardware Debugging

  11. Member 2 – Srichand Yella • Researched on touch screens and Battery Fuel Gauge • Designed the circuit for the fuel gauge and the wireless transceiver • Designed the PCB layout • Developed the touch screen graphics • Wrote the code for host computer • Debugged the hardware

  12. Member 3 – Varun Vallabhaneni • Researched on components such as the RFID reader and level translator • Designed the schematic for microcontroller, RFID reader • PCB Layout • Hardware testing of the RFID reader and battery charger circuit • Packaging of the device

  13. Member 4 – Madhu Tummala • Researched LDOs • Designed circuit for LDOs • Interfacing ZigBee Transceiver and RFID reader to Microcontroller • Programming Microcontroller using code warrior • Packaging

  14. Questions / Discussion

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