1 / 26

ECE 477 Design Review Team 22  Txt Msg DJ

ECE 477 Design Review Team 22  Txt Msg DJ. Garrett Strzelecki. John Doherty. Chris McCabe. Kyle Brown. K. Outline. Project overview Project-specific success criteria Block diagram Component selection rationale Packaging design Schematic and theory of operation PCB layout

cyma
Download Presentation

ECE 477 Design Review Team 22  Txt Msg DJ

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ECE 477 Design Review Team 22  Txt Msg DJ Garrett Strzelecki John Doherty Chris McCabe KyleBrown K

  2. Outline • Project overview • Project-specific success criteria • Block diagram • Component selection rationale • Packaging design • Schematic and theory of operation • PCB layout • Software design/development status • Project completion timeline • Questions / discussion K

  3. Project Overview The Text Message DJ is a standalone unit that creates and maintains a party playlist based on song requests sent from party guests via SMS. Guests can send text messages containing song names and the Text Message DJ will automatically parse messages, sort requests, and play the most popular by streaming from the internet. In addition to playing the song audio, the Text Message DJ will strobe lights in sync with the beat of the currently playing song. Settings are stored on a SD Card in plain text. G

  4. Project-Specific Success Criteria • An ability to receive and parse text messages • An ability to strobe and move lights in sync with audio using the DMX512 protocol • An ability to queue songs based on the number of votes each song receives and display the queue on an LCD Screen • An ability to retrieve and play audio of requested songs using an online streaming service through an API • An ability to load configuration files from an SD card J

  5. Block Diagram C

  6. Component Selection Rationale Microcontroller Design Constraints • 3 UART/USART (RasPi, GSM, DMX 512) • 2 SPI - 250kBaud (SD Card, LCD) • 3PWM (Strobe LED) • 1 ATD (Audio Equalizer) • 5 GPIO (Diagnostic LEDs) • JTAG Programming and Debugging ATxmega64A3U • Fits all design constraints without exceeding excessively K

  7. Component Selection Rationale Raspberry Pi • Inexpensive • Connects to Internet via Wi-fi • Can interface with existing web-based music streaming services GSM Module • Inexpensive • Good documentation and service record Shift Register • Reduce connections external to PCB • Save GPIO pins for debugging J

  8. Packaging Design G

  9. Packaging Design • Rectangle shape: • 6 x 9 x 2 inches • Peripherals: • 2 x 16 LCD on front Panel • External Antenna • Power and wifi LED indicators • 6V power adapter in rear • SD Card slot • SIM Card • Audio out G

  10. Schematic/Theory of Operation Voltage Regulators: • 3 Different Voltages Required • Varying Current Requirements C/K

  11. Schematic/Theory of Operation Microcontroller • Function: Parse SMS messages, control external DMX device/s, control strobe LED, control LCD, manage song playlist, control raspberry pi • Operating Mode: 3.3V • Headers on all pins for debugging C/K C/K

  12. Schematic/Theory of Operation Raspberry Pi • Function: Retrieve songs from internet, output audio to external device • Operating Mode: 5V @ 700mA – 1.2A • Interface: UART: Port F C/K

  13. Schematic/Theory of Operation GSM Module • Function: Send and receive SMS messages • Operating Mode: 3.8V @ 400mA – 2A • Interface: UART: Port E C/K

  14. Schematic/Theory of Operation C/K

  15. Schematic/Theory of Operation DMX Module/ RS 485 Level Converter • Function: Translate Microcontroller Signal to DMX 512 Signal • Operating Mode: 3.3V @ 1mA • Interface: UART: Port E C/K

  16. Schematic/Theory of Operation SD Card Reader • Function: SD card stores setup files • Interface: SPI: Port D Microcontroller bypass capacitors C/K

  17. Schematic/Theory of Operation Strobe LEDs/Control Transistors • Function: Strobe to Music • Operating Mode: 5V @ 1A • Interface: PWM: Port A Equalizer • Function: Convert Audio to Strobe • Operating Mode: 3.3V • Interface: ADC & General I/O: Port B

  18. Schematic/Theory of Operation Other Components: Diagnostic LEDs • General I/O: Port A Reset Switch • Reset Pin JTAG Header • Port B: JTAG Shift Register and LCD Screen • Display Playlist • SPI & General I/O • Port C

  19. PCB Considerations

  20. PCB Considerations Strobe LED Power Debug LEDs Micro LCD Header Equalizer GSM DMX SD Slot

  21. Micro Micro Reset JTAG Power Filter

  22. Power Supply Considerations 3.3V 3.8V 5V

  23. Software Design/Development Status • Microcontroller • Event driven • Triggers: serial input (UART) from GSM Module and Raspberry Pi • Raspberry Pi • Event Driven • Trigger: serial input(UART) from Micro • Utilize ‘Twisted’ (Async Server Software) • Chrome CLI K

  24. Project Completion Timeline • 08-Mar: Final Schematic/PCB Layout • 11-Mar: N/A (Txt Msg DJ Company Holiday) • 20-Mar: Initial Software Design • 25-Mar: Raspberry Pi Interface with Micro & GSM Module/SIM on PCB • 01-Apr: DMX Protocol/LCD Screen with Queue on PCB • 08-Apr: Strobe LED/ SD Card functional G

  25. Project Completion Timeline • 15-Apr: PCB fully functional and assembled • 17-Apr: Project Packaged • 19-Apr: Completed User Manual • 22-Apr: Final Test and Setup for Demo • 24-Apr: Final Deliverables G

  26. Questions / Discussion

More Related