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Speaker Control SYSTEM

Speaker Control SYSTEM. EMBEDDED SYSTEMS FINAL PROJECT WADE HANSEN & SORA SOGUR. System Diagram. TouchOSC iPhone App. Sends Open Sound Control (OSC) messages via 802.11 to PC application C onfigurable layout where input components correspond to individual OSC messages

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Speaker Control SYSTEM

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  1. Speaker Control SYSTEM EMBEDDED SYSTEMS FINAL PROJECT WADE HANSEN & SORA SOGUR

  2. System Diagram

  3. TouchOSC iPhone App • Sends Open Sound Control (OSC) messages via 802.11 to PC application • Configurable layout where input components correspond to individual OSC messages • Can send and receive messages from host inside or outside of internal Wi-Fi network- opens up many possibilities for future projects using this app

  4. Processing PC Application • Open source language and IDE built for electronic arts and visual design • Similar to Java language • Uses built-in OSC library to receive OSC messages • Uses Processing Serial library functions to send data out to XBee development board • Application can also send the speaker selector commands (by clicking toggle buttons)

  5. XBee RF Modems • Easy to configure, low power TxRx modules • Transmits up to 300 feet indoors • Cheap! ~ $20 • Uses 802.15.4 (ZigBee wireless protocol) • In addition: 10 Digital I/O pins for sampling analog/digital signals • PC side XBee receives serial control signals via RS-232 connection and transmits to µC-side XBee.

  6. Microcontroller/TxRx Board • Uses the Olimex 28-pin development board with Atmega88PA • Four output pins control relays • Two USART I/O pins connect to Xbee’s UART Data In/Out

  7. Speaker Selector Module • Passive device used to switch on/off 4 separate pairs • Includes “Impedance Protection” • Four mechanical push-button switches removed, replaced by four DPDT relays. • Relay latching triggered by 4 microcontroller outputs • Indicator LEDs added to panel

  8. Modified Speaker Selector Module 4 DPDTrelays ImpedanceProtectionresistors LEDs addedto front panel

  9. Speaker Switch Schematic

  10. Other Potential Uses • Home Automation • Security • Lighting • Power Management • Remote Control Tank • Electronic Instrument Controllers • Keyboards • Drum Machines • Sequencers • “Doggy Door Latch” Photo Courtesy of Geeky-Gadgets.com

  11. Demonstration

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