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

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

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

Performance Requirements Power Inputs AC Power (U.S., Canada) 95 – 132 V @ 57-63 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

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