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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