MP3RRY CHRISTMAS

1
MP3RRY CHRISTMAS

• A musically synchronized light show

Kevin Cook Eric Southard Jonathan Torrell Elliott
Wood
2
Feature Overview

• Plays synchronized music light shows
• Controls 32 channels of lights
• Works for any AC device
• Synchronizes with any MP3
• Automatically generates show based on detected
  musical events
• Manual programming option available

3
Project Approach

• Pre-programmed light show
• No real-time analysis
• Simplicity and flexibility
• System on a chip MP3 decoder
• SD Flash
• Modular hardware
• Distributes current draw
• Provides localization
• If ones goes out the rest stay lit!

4
MATLAB Analyzer

• Automated analysis implemented in MATLAB
• 10 filter banks isolate frequency bands
• Thresholding determines state of lights
• Thresholds dynamically determined from
  statistical properties of signal

5
Music Programmer

• Allows visual approach to planning show
• Imports MATLAB data for basis
• Displays real-time preview
• Generates programming file for controller

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Master Controller Details

• PIC18F45J10 Microcontroller
• 2 SPI Ports
• VS1011B SOIC MP3 Decoder
• Decoder, DAC, Amplifier
• SD Flash memory
• SPI Interface
• Four 8-bit Buffer / Line Drivers
• RS-232 Interface to PC

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Master Controller Diagram
SD Card
8
8
Buffer 1
To Slave 1
SPI
8
8
Buffer 2
Microcontroller
To Slave 2
Play/Pause
8
Next Track
8
8
Buffer 3
To Slave 3
SPI
MP3 Decoder SOIC
8
8
Buffer 4
To Slave 4
Line Out Audio to Amp Speakers
8
Master Controller Board
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Slave Hardware Details

• Eight TRIACs
• Control 8 AC circuits
• Switched by zero-cross optoisolators
• RJ-45 Interface to Master Controller

10
Cost Analysis
Total Profit 1,518,125
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Market Analysis

• Potential customers
• Christmas light enthusiasts
• Parks and municipalities
• Amusement Parks
• Price comparison vs. Light-o-Rama
• Master controller 16 channels 600
• Additional 16 channel slave 420
• Software 100
• Total cost 1120

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Any Questions?