Remote Operated AudioVideo Switcher

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Remote Operated Audio/Video Switcher
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Team Members

• Jordan Goulder, Leader
• Joe Laszczak
• Kian-Wah Chee
• Dr. Harden, Advisor

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Problems With Current A/V Devices

• Low Cost Switchers
• Bad signal quality
• Manually switched
• High-End Receivers
• High cost
• Large size

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Solution

• Remote Controlled With Current Remote
• Quality Output
• Relatively Small
• Reasonable Price

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Objectives - Design

• IR Frequencies RC5 and RECS 80
• Signal Loss lt10 dB at 10 MHz
• Input Voltage 0.5 - 2.0 Volts
• Input Frequency 20 Hz to 890 MHz
• Crosstalk 56 dB at 10MHz

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Objectives - Real World

• Device Size 6in x 3in x 5in
• Cost 60
• Learning Ability User Programmable Remote Button
• Reliability 1 error per 1000 switches
• FCC Compliance FCC Code Part 15

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User Interface
                                   
 
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Internal Design
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IR Decoder TSP1138

• Uses Photo Diode
• Input - IR Signal
• Output - Digital Signal
• Active Low Output
• Low Power Usage

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IR Decoder - Output
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Multiplexer AD8184

• 4 Inputs
• 1 Output
• 700 MHz Bandwidth
• -88dB Crosstalk at 10MHz

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Multiplexer Frequency Response
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Multiplexer - Crosstalk
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Controller MSP430F149

• RISC Architecture
• 48 I/O Pins
• Low Power
• Low Cost

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Microcontroller VS FPGA
Microcontroller Analysis
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Microcontroller VS FPGA
FPGA Analysis
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Controller Flow Chart
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Hardware Testing
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Software Testing
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Power Consumption
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Cost of Major Components
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Primary Design Elements

• Minimization of crosstalk
• Minimization of signal loss
• Interface between IR Decoder and Microcontroller
• IR Signal Verification