william weeks electrical engineering team leader hardware usb host research and documentation jesse...
TRANSCRIPT
Synchronized Light Blinker
Mid-Semester Presentation
Team Members
William WeeksElectrical Engineering
Team LeaderHardwareUSB Host
Research and Documentation
Jesse KilloughElectrical Engineering
USB HostMP3 Decoder
Research and Documentation
Mark WilliamsElectrical Engineering
Signal ProcessingHardware Support
Research and Documentation
Overview
• Problem Statement• Solution• Technical Design Constraints• Practical Design Constraints• Approach and Tradeoffs• Timeline• Progress• References
Problem Statement
• Current synchronized lighting devices are either expensive, or low quality
• There is a need for an inexpensive device that performs at a high quality
Solution
• A standalone device that can extract an .mp3 file from a USB flash drive
• Digital filtering• Completely autonomous lighting• Low price
Technical Design Constraints
Constraint Description
Synchronization Synchronization between music and lights must be less than 100 milliseconds.
Audio Quality The SLB must play music at a sample rate of at least 44.1 kHz and 128 Kbit/s bit rate.
Audio Compatibility The SLB must play .mp3 file format songs.
Output It must be capable of powering at least three receptacles with a 5A current draw per receptacle.
Autonomous The SLB must be a pre-programmed standalone device that plays songs from a USB flash drive.
Practical Constraints
• The SLB must have a retail price of under $75.00
• Superior performance in comparison to other low end productsML1-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.
Practical Constraints
Lights
AudioFile
Approach
SLB
Music
Trade-offs• USB Host
• MP3 Decoder
• Microcontroller
• Signal Filtering
• Switching Device
USB HostInterface USB
CertifiedBreakout
BoardPrice
VDIP1 FIFO, SPI, UART
Yes Yes $24.50
MaximMax3421E
SPI Yes Yes $38.00
[3] [4]
MP3 Decoder
[5]
[6]
[7]
Bit-rate(kbits/s)
BreakoutBoard
Spectrum AnalyzerPlug-in
Price
VS1011E 320 Yes Yes $19.95
VS1002 320 Yes No $19.95
STA013 320 No No $16.00
MicrocontrollerPIC24HJ32GP202 PIC24HJ128GP506
Signal FilteringAdjustable Stability Simplicity
Analog No No Yes
Digital Yes Yes No
[8]
[9]
Switching DeviceSize
IssueKnowledge Switching
Speed IssueNoise Heat Sink
RequiredPrice
Electromechanical Relay
No Yes No Yes No $2.50
Solid State Relay No Yes No No No $11.60
Triac No No No No Yes $7.50
[10]
Triac• Relay or Triac? Triac, So…..• What is a Triac?
MOC3011-M TRIAC Driver
Q6025P5 TRIAC
Test Circuit
[12]
[11]
[12]
Timeline
August September October November
Approach Decisions
Hardware Design
Filtering
Programming
Testing
Progress• Populated Board• Built and Tested Triac Unit• Communication between the USB host and PIC • Web Site Complete and Regularly Updated
Triac Enclosure
3.3VDC
120VACInput
Fused 120VACOutput
Triac Test3.3VDC Driver Voltage Not Applied 3.3VDC Driver Voltage Applied
References[1] “Ramsey Electronics, ML1,” October 7, 2009. [Online.] Available: http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=ML1C
[2] “Electrical Safety.” [Online]. Available: http://www.pacificpower.net/Navigation/Navigation4124.html [Accessed: September 12, 2009].
[3] “UTL-001,” September 29, 2009. [Online.] Available: http://www.hdl.co.jp/UTL/UTL-001.
[4] Future Technology Devices International, Ltd., “Vinculum VNC1L Prototyping Module,” VDIP1 datasheet, 2006-2007.
[5] “Breakout Board for VS1011E-L MP3,” September 28, 2009. [Online.] Available: http://www.sparkfun.com/commerce/images/products/08820-03-L.jpg.
[6] “Breakout Board for VS1002 MP3,” September 29, 2009. [Online.] Available: http://www.sparkfun.com/commerce/images/products/00519-03-L.jpg.
[7] “STA013 Datasheet,” September 28, 2009. [Online.] Available: http://www.st.com/stonline/books/pdf/docs/6399.pdf.
[8] “Analog Filter Design Demystified,” September 30, 2009. [Online.] Available: http://www.maxim-ic.com/appnotes.cfm/an_pk/1795.
[9] “Digital Filters: An Introduction,” September 30, 2009. [Online.] Available:http://www.dsptutor.freeuk.com/dfilt1.htm.
[10] “Solid State Relays,” September 30, 2009. [Online.] Available:http://www.mouser.com/ProductDetail/Omron-Electronics/G3M-205PL-DC12/?qs=sGAEpiMZZMtHD6BhCPGf2pzm/lBpqtlmT%252bYerubOsYw%3d.
[11] “Triacs,” September 30, 2009. [Online.] Available: http://www.littelfuse.com/data/en/Data_Sheets/E2Triac.pdf.
[12] “MOC3011M,” September 30, 2009. [Online.] Available: http://www.fairchildsemi.com/ds/MO/MOC3011M.pdf.
QUESTIONS?