“Magic Rainbow” Music Visualizer The Colors of Sound Group Jamaal Merriweather Justin McDevitt Weston Bell Robert A. Hicks II Georgia Institute of Technology.

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Presentation transcript:

“Magic Rainbow” Music Visualizer The Colors of Sound Group Jamaal Merriweather Justin McDevitt Weston Bell Robert A. Hicks II Georgia Institute of Technology ECE 4007/RP1 (em2) Senior Design Project – PDR Presentation

Project Overview What: LED music spectral intensity visualization system. Why: Enhance musical experience for the hearing impaired. Who: Individuals with hearing disabilities. Prototype Equipment Cost: $

Design Objectives/Goals Design ObjectiveVerification/Implementation PortabilityWeighs under 20 lbs and maximum enclosure size 20” x 20” x 6” Visual response to audio inputLED Zones indicate intensity/power levels through LED brightness or quantity of LEDs illuminated. VersatilityUSB compatible; 2GB (or greater) of system memory; Simulink and drivers installed Low Power RequirementsMaximum: 2 W (DAQ Digital Power Supply) Maximum: 25 W (External Power Supply)

Overall Design Layout

Software Flow Diagram

Software Problems & Issues Real Time vs. Simulation Time. Post-FFT Sampling & Form Conversion Timing. Serial vs. PWM Communication Modes. DAQ recognition in Simulink. (Future): Tempo Extraction

Hardware Flow Diagram

LED Zone Circuit Schematic

Resistor Values and Duty Cycle

Hardware Problems & Issues Total Power draw for LED zones. Brightness and low viewing angle of LEDs. Optimal Circuit layout for Soldiered LED zones. Exact enclosure Design.

Software Acceptance Testing Verified Spectrum Processing with Simulink model. Tested DAQ recognition in Simulink. Tested DAQ device’s USB compatibility on different machines. Achieved real-time/simulation-time synchronization with low-level Simulink model.

LED Display Simulation & Spectrum Verification

Hardware Acceptance Testing Successfully Constructed Zone 1 on bread board Verified ability to adjust Duty Cycle. Manually controlled IC using DAQ card.

Future Work Interface DAQ with Simulink Model Create MATLAB function to generate PWM control Interface DAQ with LED Drivers Achieve 1 working LED zone with LED Driver and DAQ Achieve all working LED zones Assemble chassis for final prototype

Any Questions??