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ECE 477 Design Review Team 01  Fall 2012

ECE 477 Design Review Team 01  Fall 2012. Brennan Tran. Jonah Ea. Ben Pluckebaum. Kevin Meyer. Outline. Project overview Project-specific success criteria Block diagram Component selection rationale Packaging design Schematic and theory of operation PCB layout

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ECE 477 Design Review Team 01  Fall 2012

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  1. ECE 477 Design ReviewTeam 01  Fall 2012 Brennan Tran Jonah Ea Ben Pluckebaum Kevin Meyer

  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

  3. Project Overview • Interactive sound board • LED button matrix to receive input and display feedback • Adjust volume and BPM • Save and load configurations to flash • Save music sample to midi file on SD card • (Flash Application: Tone Matrix)

  4. Project-Specific Success Criteria • An ability to poll an array of pushbuttons to manipulate the musical configuration and display a visual pattern using LEDs. • An ability to output multi-tone audio. • An ability to adjust the volume and BPM of the output audio. • An ability to save and load musical configurations to and from flash memory. • An ability to save a configuration as a MIDI file to an SD card.

  5. Block Diagram

  6. Component Selection Rationale • Microcontroller: TM4C123GH6PM (Tiva C) • 80 MHz Operating Frequency • 256 KB Flash Memory • Floating Point Unit • 4 SPI Modules • 43 Max GPIO pins

  7. Component Selection Rationale • RGB LED Matrix • Multiple LED colors • Breakout boards for easy interface • SN74HC595 shift registers • 35 mA max source current • 22 mA constant current required for eight LEDs in parallel

  8. Component Selection Rationale • DAC8571 Digital-Analog Converter • I2C Interface for reduced pin count • 16 bit resolution (same as CD’s) • Amplifier • LM324 Quad Op Amp (1.5 gain) • LM4902 Audio Amplifier under consideration

  9. Component Selection Rationale • LM317M Adjustable Regulator • Simple for 5V voltage regulation • Over 500 mA output current • TPS73633 Low-Dropout Regulator • 400 mA output current • Fixed 3.3 output voltage

  10. Packaging Design • 23 x 33 x 10 cm(9 x 13 x 4 in) • RGB LED Matrix (8x8) • 2 Speakers • 1 LCD • 4 Pushbuttons • 2 Rotary Encoders

  11. Packaging Design • Reset Switch • Power Switch • SD Card Slot • Power Jack • 1.35 mm ID • 3.5 mm OD • 6.2 mm depth

  12. Schematic– Power Circuit

  13. Schematic – Microcontroller

  14. Schematic – LED Matrix

  15. Schematic – Button Matrix

  16. Schematic – Audio Circuit

  17. Schematic – LCD

  18. Schematic – Function Controls

  19. Schematic – SD Card

  20. PCB Layout

  21. PCB – Power Circuit

  22. PCB – Microcontroller

  23. PCB – Audio Circuit

  24. PCB – LED Matrix

  25. PCB – Button Matrix

  26. PCB – LCD

  27. Software Development Status • Utilizing Code Composer Studio to prototype with the TI StellarisLaunchPad • Testing SPI using 74HC595 shift registers to output to LEDs • Interfacing DAC using I2C • Begin interfacing with flash memory • Outlined a flowchart for basic behavior

  28. Software Design – Flowchart

  29. Project Completion Timeline

  30. Questions / Discussion

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