1. Wireless Surround Sound
Electrical Engineering 595
Capstone Design Project
University of Wisconsin-Milwaukee
Team 2
Wireless Surround Sound
Ayodeji Opadeyi
Brian Felsmann
Eenas Omari
Kevin Erickson
Rick Ryer

2. Block Diagram Transmitter Receiver × 2 Transmitter Power Supply ADC
Analog Channels from Receiver (Left & Right Rear)
Transmitter
Transmitter
Power Supply
(Eenas)
ADC
(Ayo)
IR Transmitter
(Kevin)
Analog
Digital
Infrared
Receiver × 2
Receiver
Power Supply
(Rick)
Amplifier
(Brian)
DAC
(Ayo)
IR Receiver
(Kevin)
Analog
Digital
Analog Channel to Speaker

3. Wireless Surround Sound
Definition:
Wireless surround sound using infrared technology
A plug-n-play system compatible with existing receiver and speakers
Benefits:
No need for unsightly wires around living room
Fast installation of surround sound
Features:
Powerful 70 watt delivered the rear speakers
Maximum operating range of 25 feet
On/Off/Standby modes of operation

4. Performance Requirements
Power Inputs
AC Power (U.S., Canada) 95 – Hz
Short circuit protection for transmitter and receiver
ESD Protection
Electrical Interfaces
Analog input from audio receiver
70 watt analog output to speakers
Analog input is digitalized and sent via infrared emitter and photodiode and converted back to an analog signal
User Interfaces
On/Off switch on transmitter and receiver
Sight Laser for installation
Operation Modes
On/Off, Standby (Automatic sleep/wake based on signal presence)
Mechanical Interface
On/Off Switches
ADC & DAC:
16 bit resolution conversion
44.1 kHz Sampling frequency (minimum)
Total propagation delay from input to output < 30 μs
Amplifier Requirements:
70 Watts peak power
90 dB SNR
0.1% THD

5. Standard Requirements
Temperature Ranges
Operating Temperatures: 10°C – 40°C
Storage Temperatures: -10°C –70°C
Humidity Ranges
Operating humidity: 2% – 98%
Storage humidity: 2% – 98%
Product Life
5 years
90 day warranty
Product Dimensions
Transmitter, 6” W x 2” H x 6” L
Transmitter PCB Area: 195 cm2
Receiver, 9” W x 3” H x 9” L
Receiver PCB Area: 466 cm2 for each receiver
Safety Requirements
Primary Safety Standards
UL 6500, IEC 61603, IEC 61558
EMC Safety Standards
INC61204, IEC 55103, IEC61000