Transcript RGB LED Cube

RGB LED Cube
Team 15: Can’t Undo Bad Electrons
Luke Ausley
Joshua Moyerman
Andrew Smith
BSEE
BSPE
BSPE
Sponsored by Stellascapes
Motivations and Goals
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Desire to discover innovative methods for
improving LED cube design
Project aligned with individual group
member’s expertise and interest
Specifications
Title
QTY
Units
Cube Resolution
10 x 10 x 10
Voxels
Cube Dimensions
50 x 50 x 50
cm
Outer Dimensions
60 x 60 x 70
cm
Pitch
5
cm
Refresh Rate
100
hz
Animation Rate
25
fps
Color Space
24
bit
Operating Voltage
120
V
Operating Current
6
A
High Level Diagram
High Level Work Distribution
Hardware Block Diagram
Key Hardware Design Decisions
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Control Hardware Structure
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LED Driver Board
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Joint FPGA/MCU
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TI LED Drivers
MOSFETs
PCB Layout
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Three separate two-layer PCBs
Driver Design
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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
Driver Schematic
Driver PCB Layout
Control Design
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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
FPGA and MCU Choice
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PIC24HJ265GP206A Microcontroller
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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
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Team’s familiarity with Xilinx ISE from Digital Systems Lab
work
Stellascapes interest in integrating FPGA with PIC24
Control Schematic
Control PCB Layout
Power Supply
Meanwell SP-200-5
Output Voltage
5V
Max Current
40 A
Input Voltage
85-264 V
Input Frequency
47-63 Hz
Max Input Current
3.5 A
Dimensions
7x4x2 in
Construction
Construction
Firmware - MCU
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Developed using C
Microchip MPLAB X IDE
Microchip XC C Compiler
Microchip’s freely available TCP/IP Stack
Firmware - FPGA
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Written in Verilog
Xilinx ISE 14.2 Development Environment
Firmware Update Cycle
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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
Software
Software Design Choices
Software Block Diagram
Animation Class Diagrams
Animation Creator GUI
Transmission Methods
Simulators
LED Cube Simulator
Animation Features
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Mathematical Patterns
Geometric Patterns
Scrolling through Volume
Scrolling across Faces
Rendering of Physical Phenomenon
Color Transitions
Budget
Item
Qty
Total Cost
LEDs
1200
$350 - Sponsored
Construction Materials
N/A
$150
PCBs
3
$100 - Sponsored
LED Drivers/MOSFETs
20
$75
Power Supply
1
$70
Frame & Case
N/A
$100
Assorted Components
N/A
$20
Current Amount Spent (Non-sponsored)
$200
Estimated Total (Non-sponsored)
$415
Progress
Issues
•
Construction
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o
Plane bending
Secure method for attaching base
Special Thanks
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Stellascapes
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Sponsorship
Technical Review
Q&A Session