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E CE 477 Design Review T eam 8 – Fall 2014

E CE 477 Design Review T eam 8 – Fall 2014. Kevin Baijnath | Michael Welling | Eric Bain | Tyler Leamon. Project overview Project-specific success criteria Block diagram Component selection rationale Packaging design Schematic and theory of operation PCB layout

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E CE 477 Design Review T eam 8 – Fall 2014

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  1. ECE 477 Design ReviewTeam 8 – Fall 2014 Kevin Baijnath | Michael Welling | Eric Bain | Tyler Leamon

  2. Project overview • Project-specific success criteria • Block diagram • Component selection rationale • Packaging design • Schematic and theory of operation • PCB layout • Software design/development status • Project completion timeline • Questions / discussion Outline

  3. Graphical Audio Visualizer to enhance environment at entertainment venue. • Wireless pillars about 3 ft. tall and 3 in. wide tubes. • Each pillar has custom frequencies set by user on mobile device. • LEDs in each pillar will light up according to amplitude of set frequency in song. • Mobile device will also control settings in base station. • Base station and towers will communicate wirelessly. Project Overview

  4. An ability to successfully add or remove towers as needed • An ability to wirelessly transmit LED control data from the base station to remote towers • An ability to control device settings using a mobile device over wireless interface • An ability to display network status on each tower • An ability to process audio input to identify frequency amplitude Project-Specific Success Criteria

  5. Block Diagram

  6. Block Diagram

  7. Component Selection Rationale

  8. Base station – • 2 UART channels – Bluetooth and Xbee • DSP library • Tower – • 1 UART Channel - Xbee • 1 SPI Channel – LED Strip Microcontroller Peripherals Required

  9. Xbee S2 module – • Star network • Ease of implementing and adding devices • Bluetooth BC127 module – • Bluetooth 4.0 LE • Compatible with iOS and Android devices • LED Strip – • Each LED individually addressable • Requires only 1 data pin to control all LEDs Other Components

  10. Packaging Design • Base Station • LCD screen for debugging • Pushbuttons for manual settings without mobile device • LEDs for status indicators for transmitting data. • Tower • Frosted acrylictube with LED strip suspended in the middle. • LEDs for status indicators for transmitting data.

  11. Schematic: Base Station Micro

  12. Schematic: Bluetooth

  13. Schematic: Audio Circuit

  14. Schematic: Voltage Regulators

  15. Schematic: Tower Micro

  16. Schematic: Xbee

  17. Schematic: LCD and More

  18. General • Two PCBs • 10 mil trace minimum • Wires cross perpendicularly • Avoid acute angles • SparkFun DRC LEDs PCB Layout – Tower MICRO POWER POWER XBee

  19. Ground Plane • 10 mil Isolate • Reduces system impedance PCB Layout – Tower

  20. Audio In Bluetooth PCB Layout – Base Station Push buttons MICRO XBee POWER LCD

  21. PCB Layout – Base Station

  22. Decoupling capacitors placed near/under the micro • Oscillators in close proximity PCB – Microcontroller

  23. Voltage Regulators to +3.3V and +5.0V • 50 – 90 mil trace width • Power rails placed around the outside PCB – Power Supply

  24. Placed near sides of PCB • Avoid placing wires under antennas PCB Layout - Xbee/Bluetooth

  25. LED Strip Push Buttons PCB – Miscellaneous Auxiliary Port LCD

  26. Base Station Micro - • Polling and Interrupt (hybrid) • Polling for Audio Data • UART triggered Interrupts • Tower Micro – • Polling • Polling for LED Data Software Design

  27. Software Design – Mobile App

  28. Software Status

  29. Project Completion Timeline

  30. Questions/Discussion

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