3D Graphical DisplayArarat AdamianBrian McDonald

Tyler BlairAdrian Williams

Outline of PresentationProject objectives and purposeImplementationBlock DiagramsDivision of LaborScheduleParts listRisksCritical Points

Brian

Project objectives and purposePrimary 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

ExtensionsThe 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.)

Brian

Block Diagram

Tyler

Block Diagram Cont’d

Tyler

Microcontroller

Ara

Atmega328High Performance, Low Power 8-bit

Microcontroller32 KB of Flash, 2KB of RAM1.8V-5.5V operating range20 MHZ23 Programmable I/O lines

Ara

MAX7219Serial input/output common-cathode display

driverAble to control up 64 individual LED’s

Each Chip will control 16 RGB LED’sSingle Intensity Register4.0 to 5.5 V operating range2.25 ms Data-to-Segment Delay

Ara

Circuit Diagram

Ara

ImplementationMicro-controller

Atmega328 that will communicate with computer through USB

Line controllerMAX7219

8x8x8 LED cubePower Supply

Ara

CubeConsist of 12 planes

Each plane is 10” x 10”1/16 “ thick8 planes will have 64 3/16” holes spaced an

inch apart4 other planes will enclose the sides of cube

MaterialClear Acrylic Plexiglas

Tyler

RGB LED’s20 mA Forward Current 30 mA Peak Forward Current1.8V to 2.2V Forward Voltage4 pin LED

RedGreenBlueCathode

7 different colors

Tyler

Power SupplyLM2678

3.3V, 5V, and 12V fixed outputCapable of driving up to 5A loadsHigh efficiency (92%)

LM25753.3V, 5V, 12V, and 15V fixed outputGuaranteed 1A output currentHigh Efficiency

Ara

SoftwareDemos

5 demo programs will be preloaded on the cube

User-defined ProgramsMATLAB

Creates a text file Send file to controller via USB

Arduino Library’sLED Control LibraryWi-Shield Library

Brian

Demo

Division of LaborGroup Member Tasks

Ararat Adamian •Programming the microcontroller •Programming the WiFi interface to communicate with wireless peripherals (e.g. smartphones).

Brian McDonald •Interfacing with the computer. •All Soldering Tasks

Tyler Blair •Designing the high-current switching power supply to efficiently power the LEDs.•Physical construction of the cube

Adrian Williams •Designing the PCB•Completing all documentation.

Adrian

ScheduleTask 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

S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F SJan 16, '11 Jan 23, '11 Jan 30, '11 Feb 6, '11 Feb 13, '11 Feb 20, '11 Feb 27, '11 Mar 6, '11 Mar 13, '11 Mar 20, '11 Mar 27, '11 Apr 3, '11 Apr 10, '11 Apr 17, '11 Apr 24, '11

Adrian

Critical pointsMilestone 1

PCB designed and orderedPower supply finishedAll planes are finishedMicro-controller is being programmed

Milestone 2Hardware is completely built and testedSoftware is being designed to interface with cubeUSB/Wireless interfaces are being builtDocumentation is being completed

ExpoEverything is completed and works perfect

Adrian

Cost of PartsQuantity Part Description Price ($) Vendor

600 RGB LEDs 5mm 359.70 Sparkfun

24 MAX7219 0.00 Maxim(sampled)

1 Atmega328P 5.50 Sparkfun

1 FT232RL 3.95 Sparkfun

1 LM2575 0.00 Previously Owned

1 LM2678 0.00

National Semiconductor(Sampl

ed)

1 USB Female Type B Connector 1.25 Sparkfun

12 1/16" Plexiglas (10” x 10” each) 28.00 Colorado Plastics

1 AsyncLabs WIshield 0.00 Previously Owned

Various components 60.00

Sparkfun, JP Saunders, Home

Depot

Total $458.40

Adrian

RisksProject is heavily hardware orientated Time constraintsFeasibility of extensionsUnfamiliarity with WiFi technologyPower requirementsHeat dissipationLEDs are too bright or not bright enough

Adrian