3D Graphical Display
Ararat Adamian
Brian McDonald
Tyler Blair
Adrian Williams

Brian
 Project objectives and purpose
 Implementation
 Block Diagrams
 Division of Labor
 Schedule
 Parts list
 Risks
 Critical Points

Brian
Primary Objective:
 Construct an 8x8x8 RGB LED cube with a programmable controller
 Controller will come with a preset demo as well as the ability to receive custom programs from the user
 The LED cube will provide a 3D display for the programmable content and will function as a “3D
Simulator”

Brian
 The controller will interface with a USB flash drive
 The controller will have orientation modification capabilities on board. This would provide the user with the ability to zoom, shift or rotate the image.
 The controller can wirelessly communicate with other wireless devices (smart-phones, computers, ect.)

Tyler

Tyler

Ara

Ara
 High Performance, Low Power 8-bit Microcontroller
 32 KB of Flash, 2KB of RAM
 1.8V-5.5V operating range
 20 MHZ
 23 Programmable I/O lines

Ara
 Serial input/output common-cathode display driver
 Able to control up 64 individual LED’s
 Each Chip will control 16 RGB LED’s
 Single Intensity Register
 4.0 to 5.5 V operating range
 2.25 ms Data-to-Segment Delay

Ara

Ara
 Micro-controller
 Atmega328 that will communicate with computer through USB
 Line controller
 MAX7219
 8x8x8 LED cube
 Power Supply

Tyler
 Consist of 12 planes
 Each plane is 10” x 10”
 1/16 “ thick
 8 planes will have 64 3/16” holes spaced an inch apart
 4 other planes will enclose the sides of cube
 Material
 Clear Acrylic Plexiglas

Tyler
 20 mA Forward Current
 30 mA Peak Forward Current
 1.8V to 2.2V Forward Voltage
 4 pin LED
 Red
 Green
 Blue
 Cathode
 7 different colors

Ara
 LM2678
 3.3V, 5V, and 12V fixed output


Capable of driving up to 5A loads
High efficiency (92%)
 LM2575
 3.3V, 5V, 12V, and 15V fixed output


Guaranteed 1A output current
High Efficiency

Brian
 Demos
 5 demo programs will be preloaded on the cube
 User-defined Programs
 MATLAB


Creates a text file
Send file to controller via USB
 Arduino Library’s
 LED Control Library
 Wi-Shield Library

Demo

Adrian
Group Member
Ararat Adamian
Brian McDonald
Tyler Blair
Adrian Williams
Tasks
• Programming the microcontroller
• Programming the WiFi interface to communicate with wireless peripherals (e.g. smartphones).
• Interfacing with the computer.
• All Soldering Tasks
• Designing the high-current switching power supply to efficiently power the LEDs.
• Physical construction of the cube
• Designing the PCB
• Completing all documentation.

Adrian
Task Name
Order/Receive Parts
Construct 8x2x2 single-color LED plane for testing
Construct 8x8 RGB LED plane
Connect Plane to Max7219 chips (breadboard)
Program micro-controller to display graphics on plane
Test Functionality
Expand plane to 8x8x8 LED cube
Connect cube to Max7219 chips(breadboard)
Design PCB
Program micro-controller to display graphics on cube
Solder PCB and finalize box for cube
Create software (Matlab)/wireless/USB interface to cube
Create Power supply
Final Testing/Documentation
CDR
Milestone 1
Milestone 2
Expo

Adrian



Milestone 1




PCB designed and ordered
Power supply finished
All planes are finished
Micro-controller is being programmed
Milestone 2
 Hardware is completely built and tested



Software is being designed to interface with cube
USB/Wireless interfaces are being built
Documentation is being completed
Expo
 Everything is completed and works perfect

Adrian
Quantity
600
Part Description
RGB LEDs 5mm
24 MAX7219
1
1
1
Atmega328P
FT232RL
LM2575
12
1
1
1 LM2678
USB Female Type B Connector
1/16" Plexiglas (10” x 10” each)
AsyncLabs WIshield
Various components
Total
Price ($) Vendor
359.70
0.00
Sparkfun
Maxim(sampled)
5.50
3.95
Sparkfun
Sparkfun
0.00
0.00
Previously Owned
National
Semiconductor(Sampled)
1.25
28.00
0.00
60.00
$458.40
Sparkfun
Colorado Plastics
Previously Owned
Sparkfun, JP Saunders,
Home Depot

Adrian
 Project is heavily hardware orientated
 Time constraints
 Feasibility of extensions
 Unfamiliarity with WiFi technology
 Power requirements
 Heat dissipation
 LEDs are too bright or not bright enough