LED Intelligent Lighting System

Final Presentation

November 28, 2007

Team Members

Jeff Pike

Responsibilities: Team Leader, DMX Communication, LED Implementation, Research, and Documentation

Major: Electrical Engineering

Ryan Foret

Responsibilities: Power Supply, DMX Communication, Research, and Documentation

Major: Electrical Engineering

Matt Ladner

Responsibilities: LED Implementation, Motor Implementation, Website, Research, and Documentation

Major: Electrical Engineering

Jeremy Scruggs

Responsibilities: Power Supply, LED Implementation, Motor Implementation, Research, andDocumentation

Major: Electrical Engineering

Overview

Introduction Problem and Solution Technical and Practical Constraints Prototype Design Testing Subsystems Future Additions Summary Questions and Answers

Introduction

Controller(Hardware/Software)

Lights(Move, Change Colors)

What is a Lighting System?

Amateurs Professionals

Hardware Controller

Software Controller

Stationary Lights

Automated Lights

Introduction

ComputerSoftware

USB to DMXInterface

IntelligentLightingFixture

*NOTE -- DMX-512 Protocol is the industry standard communication for intelligent lighting systems

Problem

Current Professional Lighting Systems Positives:

Create dynamic, multicolored showsLights move very quicklyUser can program entire shows

Negatives: Very expensive (software and light fixtures)Consume a lot of powerHeavy and bulkyUse incandescent bulbs which are fragile

Solution

LED Intelligent Lighting System

Positives: Creates dynamic, multicolored showsLights move quicklyUser can program entire showsUses durable LEDsRequires much less powerVery competitive costsLightweight and compact

Name Description

LED Intelligent Lighting System technical design constraints, adapted from [1]

Technical Constraints

The product must be able to create 16+ million colors.

The light fixture must be able to pan 360° and tilt 180°.

The light must use less than 7.5 amps at 110/120 volts.

The product must communicate using the DMX-512 protocol.

The light must have 256 different levels of intensity from completely off to fully on.

Color Variation

Range of Motion

Current Draw

Compatibility

Light Intensity

Type Name Description

Economic Cost Each fixture must manufacture under $500.00.

Health and Safety Safety The light fixtures must operate in a non-hazardous manor.

LED Intelligent Lighting System technical design constraints, adapted from [1]

Practical Constraints

Prototype Design

The LED Intelligent is divided into four major subsystems:

• Communication

• LED System

• Motor System

• Power Supply

Prototype Design

Prototype Design

Prototype Design

Prototype Design

Uses DMX-512 (Industry Standard Protocol)

Derivation of RS-485 communication

Communication

DMX-512 Format

Communication

Testing the Communication

Communication

Lastly, to test the received/stored data is correct we used HyperTerminal.

Communication

LED System

Type of LED Used

Lamina Titan RGB LED• Draws 4.2 Amps• Produces 16+ Million Colors

TLC 5940 LED Driver• Outputs 1920 mA to Both Red and Blue Diodes• One Channel is Removed to Provide

1800 mA to Green Diode

LED System

LED was Tested Visually

• Each Color’s Intensity

was Matched by Varying

its Voltage Level

• Code was Adjusted to

Reduce Flicker

Approach-Power System

Types of Power Supply Considered• Wall Industries PSPW120 AC/DC Converter

– Output Voltage of 12 Volts @ 115 VAC– Output Current of 10 Amps– Input Current Draw of 2.5 Amps (RMS)

• Building Our Own AC/DC Converter

Motor SystemMotors used in the motion control• Vexta Stepper Motor

– ~2.5 ft-lbs– .2 A / Phase

• Sure Step NEMA 23 Stepper Motor– 17.25 ft-lbs– 2.8 A / Phase

Motor Drivers • TI 5804

– Provides 1.5 Amps • Sure Step Micro-stepping Drive

– Provides 3.5 Amps output

Motor System

• Visual– Check for correct

direction– Check for

repeatability– Check for accuracy

Future Additions

• Implement an encoder for the motor– So that the motor doesn’t get lost

• Implement a power supply– Can be plugged directly to outlet

• Create a printed circuit board (PCB)

• Improve packaging appeal– For future marketing

Summary

The LED Intelligent Light:• Creates professional, multi- colored light shows.• Affordable• Durable and lightweight

References

[1] M. Ladner, R. Foret, J. Pike, and J. Scruggs “LED Intelligent Lighting System Technical and Pratical Design Constraints," unpublished.

[2] (3,Oct. 2007) handyboard.com. [Online] Available: http://www.handyboard.com/faq/display.php?key=dcservo

[3] National Instruments. “Motor Fundamentals” in National Instruments Developer Zone, Oct. 3, 2007. [Online]. Available: http://zone.ni.com/devzone/cda/tut/p/id/3656

[4] (4, Oct. 2007) donsbulbs.com. [Online] Available: http://www.donsbulbs.com/cgibin/r/b.pl/50w%7Cpar36%7Cst%7Cwfl%7C12v.html

[5] (26, Nov. 2007) automationdirect.com. [Online] Available: http://web5.automationdirect.com/adc/Shopping/Catalog/Motion_Control/Stepper_Systems/Motors_-z-_Cables/STP-MTR-23079

[6] (27, Nov. 2007) wallIndustries.com. [Online] Available:http://www.wallindustries.com/pages/pspw120.pdf