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R G B LED Cube

R G B LED Cube. Team 15: C an’t U ndo B ad E lectrons Luke Ausley BSEE Joshua Moyerman BSPE Andrew Smith BSPE Sponsored by Stellascapes. Motivations and Goals. Desire to discover innovative methods for improving LED cube design

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R G B LED Cube

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  1. RGB LED Cube Team 15:Can’t Undo Bad Electrons Luke Ausley BSEE Joshua Moyerman BSPE Andrew Smith BSPE Sponsored by Stellascapes

  2. Motivations and Goals • Desire to discover innovative methods for improving LED cube design • Project aligned with individual group member’s expertise and interest

  3. Specifications

  4. High Level Diagram

  5. High Level Work Distribution

  6. Hardware Block Diagram

  7. Key Hardware Design Decisions • Control Hardware Structure • Joint FPGA/MCU • LED Driver Board • TI LED Drivers • MOSFETs • PCB Layout • Three separate two-layer PCBs

  8. Driver Design • Two Identical boards will be used to control board to reduce power dissipation and circuit board size. • TLC5948A LED Drivers • SI4101DY-T1-GE3 P Channel Mosfet • Individually fused planes

  9. Driver Schematic

  10. Driver PCB Layout

  11. Control Design • FPGA and MCU based control system • FPGA to handle interfacing to driver circuitry due to timing constraints • MCU to handle user interfacing via ethernet • FPGA and MCU will work together to complete the task of driving LEDs

  12. FPGA and MCU Choice • PIC24HJ265GP206A Microcontroller • Low cost, 16 bit architecture • Stellascapes existing experience with Microchip line of products • Readily available ethernet interface with TCP/IP Stack • Xilinx XC3S200AVQ100 Spartan 3A FPGA • Team’s familiarity with Xilinx ISE from Digital Systems Lab work • Stellascapes interest in integrating FPGA with PIC24

  13. Control Schematic

  14. Control PCB Layout

  15. Power Supply Meanwell SP-200-5

  16. Construction

  17. Construction

  18. Firmware - MCU • Developed using C • Microchip MPLAB X IDE • Microchip XC C Compiler • Microchip’s freely available TCP/IP Stack

  19. Firmware - FPGA • Written in Verilog • Xilinx ISE 14.2 Development Environment

  20. Firmware Update Cycle • MCU code to be updated via Ethernet bootloader via Windows Application or Microchip PICkit Programmer • MCU to control loading of FPGA Device • FPGA bitstream stored on 8MB EEPROM • Updated FPGA code to be loaded via MCU Ethernet connection

  21. Software

  22. Software Design Choices

  23. Software Block Diagram

  24. Animation Class Diagrams

  25. Animation Creator GUI

  26. Transmission Methods

  27. Simulators

  28. LED Cube Simulator

  29. Animation Features • Mathematical Patterns • Geometric Patterns • Scrolling through Volume • Scrolling across Faces • Rendering of Physical Phenomenon • Color Transitions

  30. Budget

  31. Progress

  32. Issues • Construction • Plane bending • Secure method for attaching base

  33. Special Thanks • Stellascapes • Sponsorship • Technical Review

  34. Q&A Session

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