“Magic Rainbow” Music Visualizer

1. “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

2. 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: $795.62.

3. Design Objectives/Goals

4. Overall Design Layout

5. Software Flow Diagram

6. 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

7. Hardware Flow Diagram

8. LED Zone Circuit Schematic

9. Resistor Values and Duty Cycle

10. 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.

11. 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.

12. LED Display Simulation & Spectrum Verification

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

14. 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

15. Any Questions??