MP3RRY CHRISTMAS

1
MP3RRY CHRISTMAS

• A Music Synchronized Light Display
• Kevin Cook
• Jimmy Evans
• Jonathan Torrell
• Eric Southard
• Elliott Wood

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Project Description

• Display a light show synchronized with music
• Designed to control Christmas Lights
• Can control any AC device
• Analyzes and synchronizes to any MP3

3
Project Features

• Plays show from SD Flash
• Uses MATLAB for automatic analysis
• Controls 32 channels of lights
• Pulse width modulation provides dimming
• Timer resolution of 8ms
• Up to 4A max per channel
• Plays MP3s up to 192kbps
• Modular design allows for flexibility

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System Overview
AC Wall Power
Slave 1
8
8 x AC Power Outlet
Slave 2
8
Master Controller
8 x AC Power Outlet
32
Slave 3
8
8 x AC Power Outlet
Slave 4
8
8 x AC Power Outlet
5
Master Controller
8 bit Buffer / Line Drivers
8 bit Parallel Interface
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
6
Slave Subsystem
AC Wall Hot
Si
HOT Outi
This circuit x 8 No logic exists on slave
boards Neutrals and grounds tied to wall source
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Software Overview

• Music analysis implemented in MATLAB
• Array of filterbanks
• Envelope detection
• Generates binary data file
• Microcontroller programmed in Assembly
• Reads binary data file
• Interrupt timer controls lights
• Feeds MP3 data to decoder