LED Intelligent Lighting System

Mid-Semester Presentation

October 4, 2007

Team Members

Jeff Pike

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

Major: Electrical Engineering

Ryan Foret

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

Major: Electrical Engineering

Matt Ladner

Responsibilities: Power Supply, Motor Implementation, Website Management, 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 Approach Timeline 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 have a factory preset of 16 colors from apalette of approximately 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

Practical Constraints - Cost

The LED Intelligent Lighting Fixtures mustmanufacture under $500.00.

Reasoning:• Be competitive in the market place• Affordable for more consumers

Practical Constraints - Safety The light fixtures must operate in a non-hazardous manner.

How is this accomplished?Ground Fault ProtectionDurable Construction Low Heat Emissions

Types of RS-485/DMX-512 Transceivers considered

Approach – Communication

• TI SN75176 and PIC18F24J10• Artistic Licence – AL4800

Approach - LEDs

• Lamina Atlas LED

• Lamina Titan LED

• 50 Watt Incandescent

Types of Lights considered

Approach - LEDs

Intensity Current

Draw

Retail Cost

Titan LED ~ 850 lumens ~ 4200 mA $90.00

Atlas LED ~ 250 lumens ~ 1575 mA $20.00

50 Watt [4]

Incandescent

~ 720 lumens ~ 4470 mA $35.00

Approach – LED Drivers

Types of LED Drivers considered

• TLC 5940

• 4015 Boost Puck

Approach – LED Drivers

Output

Channels

Output

Current

Total Power

Output

TLC 5940 16 0-120 mA 1920 mA

4015 Boost Puck

1 0-350 mA 350 mA

* LED Drivers operate at 5 VCC

Approach – Motors

Types of motors used in motion control

• Stepping Motor– Motor that moves

in discrete steps

• Servo Motor– Consist of DC motor,

control circuit, gear reduction unit,

position-sensing device.

Approach – Motors

Pros Cons

Stepper Motors

• Low cost• High torque at low speeds• Very rugged

• Can lose position• Lower torque at higher speeds

Servo Motors

• High intermittent

torque• High speeds• More reliable than stepper motors

• More expensive than stepper motors• Require feedback• Limited to 200 degrees of movement

Timeline

ID Objective Duration Start Date Finish Date

1 Research 43 days Wed 8/1/07 Fri 9/28/07

2 Order Parts 30 days Mon 8/27/07 Fri 10/5/07

3 Implement Communication 19 days Fri 10/5/07 Wed 10/31/07

4 Implement LEDs 14 days Tue 10/9/07 Fri 10/26/07

5 Implement DC Motors 14 days Mon 10/8/07 Thu 10/25/07

6 Prototype Testing 21 days Fri 10/26/07 Fri 11/23/07

95%

80%

0%

0%

0%

0%

7/8 7/29 8/19 9/9 9/30 10/21 11/11 12/2June 21 August 11 October 1 November 21

Summary

The LED Intelligent Lighting System:• Creates multi-colored light shows.• Cost efficient• 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