2. William Weeks Electrical Engineering Team Leader PCB Design Enclosure Jesse Killough Electrical Engineering Software Mark Williams Electrical Engineering Signal Processing Power Supply

3. Problem Statement Solution Technical Design Constraints Practical Design Constraints Adjustments and Improvements Test Plan PCB Packaging References Questions

4. Current synchronized lighting devices are either expensive, or low quality There is a need for an inexpensive device that performs at a high quality

5. A standalone device that can extract an.mp3 file from a USB flash drive Digital filtering Completely autonomous lighting Low price

6. ConstraintDescription SynchronizationSynchronization between music and lights must be less than 100 milliseconds. Audio QualityThe SLB must play music at a sample rate of at least 44.1 kHz and 128 Kbit/s bit rate. Audio CompatibilityThe SLB must play.mp3 file format songs. OutputIt must be capable of powering at least three receptacles with a 5A current draw per receptacle. AutonomousThe SLB must be a pre-programmed standalone device that plays songs from a USB flash drive.

7. The SLB must have a retail price of under $75.00 Superior performance in comparison to other low end products ML1-Ramsey Electronics Retail - $59.95 [1] Economic – Price

8. Health and Safety – UL Standards SLB will handle amperages up to 5 amps Any current above 20 mA can cause death by damage to brain tissue or interrupting the normal contractions of the heart.[2] SLB must not allow lethal amperages to be reached. The SLB will be interlocked to shut-down in the case of an over-voltage or over-amperage.

9. Lights Audio File SLB Music

10. Audio Decoder Upgrade Software Improvements Power Supply

12. Continuous Playback Total Song Recognition Spectrum Analyzer

13. [3] [4]

14. PCB Enclosure and Wiring USB Audio Decoder Lighting Overall System Test

15. PCB – Print board and check spacing – Continuity of board – Modular Testing Power Triac Micro

16. Enclosure and Wiring – Continuity Tests Power Supply Receptacles Buttons Triac LEDs

17. USB – Pass data on Boot loader Text document – Stream audio data Audio Audio Decoder – Internal sine test Audible results – Stream audio data Audible results

18. Lighting – Continuous tone testing – Playing mp3 format file Overall System Test – User interface button – Synchronization – Power rating verification

22. [1] “Ramsey Electronics, ML1,” October 7, 2009. [Online]. Available: http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=ML1C [Accessed: September 12, 2009]. [2] “Electrical Safety,” [Online]. Available: http://www.pacificpower.net/Navigation/Navigation4124.html [Accessed: September 12, 2009]. [3]“Building a Power Supply,” [Online]. Available: http://www.eleinmec.com/article.asp?16 [Accessed: February 23, 2010]. [4 ]“AC/DC converter BP5081A15,” [Online.] Available: http://www.rohm.com/products/databook/pm/pdf/bp5081a15.pdf [Accessed: February 23, 2010].