William Weeks Electrical Engineering Team Leader Hardware USB Host Research and Documentation Jesse Killough Electrical Engineering USB Host MP3 Decoder Research and Documentation Mark Williams Electrical Engineering Signal Processing Hardware Support Research and Documentation

Problem Statement Solution Technical Design Constraints Practical Design Constraints Approach and Tradeoffs Timeline Progress References

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

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

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.

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

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.

Lights Audio File SLB Music

USB Host MP3 Decoder Microcontroller Signal Filtering Switching Device

InterfaceUSB Certified Breakout Board Price VDIP1FIFO, SPI, UART Yes $24.50 Maxim Max3421E SPIYes $38.00 [3][4]

[5] [6] [7] Bit-rate (kbits/s) Breakout Board Spectrum Analyzer Plug-in Price VS1011E320Yes $19.95 VS YesNo$19.95 STA013320No $16.00

PIC24HJ32GP202PIC24HJ128GP506

AdjustableStabilitySimplicity AnalogNo Yes DigitalYes No [8] [9]

Size Issue KnowledgeSwitching Speed Issue NoiseHeat Sink Required Price Electromechanical Relay NoYesNoYesNo$2.50 Solid State RelayNoYesNo $11.60 TriacNo Yes$7.50 [10]

Relay or Triac? Triac, So….. What is a Triac? MOC3011-M TRIAC Driver Q6025P5 TRIAC Test Circuit [12] [11] [12]

AugustSeptemberOctoberNovember Approach Decisions Hardware Design Filtering Programming Testing

Populated Board Built and Tested Triac Unit Communication between the USB host and PIC Web Site Complete and Regularly Updated

3.3VDC 120VAC Input Fused 120VAC Output

3.3VDC Driver Voltage Not Applied3.3VDC Driver Voltage Applied

[1] “Ramsey Electronics, ML1,” October 7, [Online.] Available: [2] “Electrical Safety.” [Online]. Available: Navigation4124.html [Accessed: September 12, 2009]. [3] “UTL-001,” September 29, [Online.] Available: [4] Future Technology Devices International, Ltd., “Vinculum VNC1L Prototyping Module,” VDIP1 datasheet, [5] “Breakout Board for VS1011E-L MP3,” September 28, [Online.] Available: [6] “Breakout Board for VS1002 MP3,” September 29, [Online.] Available: [7] “STA013 Datasheet,” September 28, [Online.] Available: [8] “Analog Filter Design Demystified,” September 30, [Online.] Available: [9] “Digital Filters: An Introduction,” September 30, [Online.] Available: [10] “Solid State Relays,” September 30, [Online.] Available: DC12/?qs=sGAEpiMZZMtHD6BhCPGf2pzm/lBpqtlmT%252bYerubOsYw%3d. [11] “Triacs,” September 30, [Online.] Available: [12] “MOC3011M,” September 30, [Online.] Available: