ECE 477 Design Review Team 15  Spring 2013

1. ECE 477 Design Review Team 15Spring 2013 Jackson McCormick, Andrew Batek, Carey Woolet, Justin Lindley

2. Presentation 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 - Abstract Interweaving the impressive visual power of electricity and the visceral emotion of music, Acoustic Storm takes analog or digital audio input and outputs its own rendition using two varieties of solid state tesla coils.

4. Overview – Selected Design Details • Input Options • Midi • Analog • Multiple Coil types • Class E HFSSTC (Tweeters) • DRSSTC (Mids) • Control Options • Temperature and spectrogram output • Potential for volume and tone control

5. Project-Specific Success Criteria • An ability to decode MIDI input and output a PWM signal at the corresponding frequencies • An ability to receive analog input, digitize it using an ADC, and output a PWM signal corresponding to the analog waveform • An ability to monitor and control system status (i.e. volume control and temperature monitoring) through an LCD and input system • An ability to generate and control a power output sufficient to drive an electrical arc based acoustic device • An ability to split audio signals at certain crossover frequencies and send them to a specific speaker (i.e. tweeters, mid, bass signals)

6. Block Diagram

7. Major Component Selection Rationale • dsPICMicrocontroller • 16 Bit PWM • Digital Signal Library • Wolfson ADC • 24 Bit Delta Sigma, I2S • Vishay/ Siliconix MOSFET • 600 V Operation • Low switching times • Low Rdson • High Current capability

8. Selection Rationale (cont.) • Coil Parameters • HFSSTC Secondary Inductance • DRSSTC Primary Inductance • DRSSTC Secondary Inductance • DRSSTC Primary tank capacitor • DRSSTC Secondary capacitance

9. Packaging Considerations • Safety Considerations • Physical Isolation – Plexiglas • Electrical Isolation – Faraday Cage • Contact Close Switch • Power Circuitry located under coils • Coaxial Cable to carry PWM signals • Generic control box casing with large distance between coils and control.

10. Coil Packaging HFSSTC • 12”x12”x20” • ~13.486 lbs. • ~$90 DRSSTC • 20”x20”x24” • ~29.5 lbs. • ~$151 *Plexiglas is already owned by Team #15 – Cost will be significantly less than shown*

11. Detailed Coil Packaging Design DRSSTC Box HFSSTC Box Front/Side: 20” 24” Chain-link (or similar) Plexiglas W/O Faraday Cage W/ Faraday Cage 12” Top: 20” 12” 20” Coil Packaging AWB - 2/5/2013 Scale: = 1”

12. Schematic/ Theory of Operation • Overview • Microcontroller • 5V/3.3V Supply • ADC • UART translating • LCD • 12V Supply • HFSSTC Control

13. Schematic/Theory of Operation

14. Schematic - Micro

15. Schematic– Power Supply

16. Schematic - ADC

17. Schematic - UART

18. Schematic - MIDI

19. Schematic - Outputs

20. Schematic

21. Schematic – 12V Supply

22. Schematic – HFSSTC Control

23. PCB Layout • ADC close to audio input • Multiple Voltage Levels • Wide Traces • Separate Areas for each function • Aesthetics

24. PCB Layout

25. PCB Layout - Micro

26. PCB Layout - Power

27. PCB Layout - Inputs

28. PCB Layout - LCD

29. PCB Layout - Output

30. PCB Layout

31. Software Design/Development Status • Completed • UART receive • PWM control function • SPI • Development • State machine for midi to parse data • Look up table for frequencies • Basic FFTs for Spectrum • FIR filtering for PWM outputs

32. Project Completion Timeline

33. Questions / Discussion

34. Questions / Discussion

35. Questions / Discussion