1. Electrical Engineering 595 Capstone Design Project
University of Wisconsin-Milwaukee
February 10, 2005

2. Team #2: Staff Eenas Omari Ayodeji Opadeyi Kevin Erickson
Brian Felsmann
Rick Ryer
BSEE
BSEE, BSCS

3. Team #2: Expertise & Experience
Eenas Omari Expertise: Electronics (Filters), Circuit design, RF , Control systems, Digital Design, Opticals
Ayodeji Opadeyi Expertise: EMC, Programming (C++, Java, Assembly), Powers, Circuit design, RF
Experience: 1 year Co-op at Harley Davidson
Kevin Erickson Expertise: Motors, AC generators, Analog/Digital Design
Experience: 2 years Co-op at Harley Davidson
Brian Felsmann Expertise: Communication systems, Fiber Optics, Programming, Digital design.
Experience: 1 year internship at Johnson Controls
Rick Ryer Expertise: Embedded Systems, Microprocessors, Digital Circuits, Assembly Programming.
Experience: 4 summer internships at GE medical.

4. Team #2: Total Resources
15-20 hours/week per team member
$500-$750 for material and prototyping ($100-$125 per team member)

5. Team #2: Decision Making
First Decision Attempt: Consensus of the entire team
Second Decision Attempt: A team member vote, majority rules

6. Roles to Define & Assign
Project Integrator: (Ayodeji) Owns weekly progress reports to TA. Logistics and communication of team meetings. Develops and Tracks overall project plan. Integrates Block design plans. Tracks expenditures. Owns project level verification and validation plan, capture and documentation of results.
Presentation Mgr: (Kevin) Owns master MS Powerpoint slide set for team including formats, logos, fonts, colors, header/footer, backgrounds, rev control, submission of master floppy or CD for P1-P4 and Final Presentation.
Report Mgr: (Eenas) Owns master MS Word document for team including revision control, formats, logos, fonts, colors, header/footer, table of contents, submission of master floppy or CD for Final report.
Archive Web Mgr: (Rick) Owns weekly backup of all electronic material generated that week. Backup for Presentation Mgr and Report Mgr. Management of any team Web site resources.
Assembly & Proto Mgr: (Brian) Owns overall assembly level definitions, basic assembly drawings, master prototype & product parts lists, collection of block parts lists, procurement of proto components. Overall prototype mechanical and electrical assembly
PCB Layout Mgr: (Rick) Owns overall PCB layout, Block to PCB mapping, PCB tools, PCB design drawings, PCB procurement, PCB assembly including special tools, soldering, wire-wrapping, drilling, and gluing.

7. Project Ideas MP3 Players DJ Audio Lighting System
RF Shopping check-out system
Wireless surround sound system

8. MP3 Players Project Key Features
Custom built MP3 player with a small LCD display showing artist and title of current song being played.
Ability to transfer music from one MP3 player to another MP3 player or computer using infrared technology.
MP3 player will use compact flash cards to store files.
Requirements
Rechargeable battery system
Small size and sturdy construction for durability

9. MP3 Block Diagram Audio Amplifier LCD Display Infrared Transceiver MP3
Decoder
Microcontroller
Compact Flash
Storage
Rechargeable
Battery System
All blocks
will need a
power source

10. DJ Audio Lighting System
Key Features
Will create custom lighting effects based on the music being played.
Music will be sampled and analyzed to determine a pattern of lighting sequences. Different frequency ranges would control different sequences.
Requirements
RCA inputs from an analog output device.
110 Volt AC Power with several relays

11. DJ Audio Lighting System Block Diagram
Lighting Relays
Analog Input
ADC
DSP/FFT
Microcontroller
Power Supply
&
Circuit Protection

12. RF Check-Out System Key Features
Allow store clerk to check-out customer sales without scanning or entering UPC into computer.
Easy and reliable inventory system for department stores.
Ability to integrate a security system with RF Check-Out System.
Requirements
Low power RF signal transmitter.
Inventory database

13. RF Check-Out System Block Diagram
Computer Interface
And Database
FOB
RF Transceiver
Microprocessor
Power

14. Wireless Surround Sound System Project
Key Features
An infrared transmitter/speaker system that eliminates annoying wires around the house to the rear surround speakers.
The system will transmit digital signals.
Able to achieve a high powered surround sound system without an expensive receiver/amplifier.
Uses existing speakers of a wired surround sound system.
Requirements
Analog inputs from receiver (left and right rear channels)
Easy to setup and install

15. Wireless Surround Sound System Block Diagram
IR Receiver/Amplifier
Power Supply
Audio
Amplifier
Right and Left Rear Analog Channel
IR Receiver
DAC
ADC
IR Transmitter
Left Rear Channel
Right Rear Channel
IR Receiver
DAC
Transmitter
Power Supply
IR Receiver/Amplifier
Power Supply
Audio
Amplifier

16. Proposed Project Wireless Surround Sound System

17. Wireless Surround Sound System
Proposed Project
Wireless Surround Sound System
Definition:
Hi-Fi 2 Channel 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.
Similar or Identical Products:
Kenwood RFU-6100 Wireless audio
Jensen JV-2400 Wireless audio/video transmitter
Market Industry:
Consumer Electronics in the U.S. and Canada

18. Project Selection Selection Reasons: Reasonable cost
Interested by all team members
A unique product
Similar, more expensive, products in market
Major Risks:
Low quality signal and transmission
Line of sight problem using IR
IR interference from existing IR products (TV remote controls)
Rejected Projects:
Prohibited cost and time
Limited team interest

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

20. Performance Requirements
Power Inputs
AC Power (U.S. and Canada) 95 – Hz
Short circuit protection for transmitter and receiver
Electrical Interfaces
Analog, Digital, and Infrared (transmit and receive < 25’)
User Interfaces
On/Off switch on transmitter and receiver
Sight Laser for installation

21. Performance Requirements
Operation Modes:
On/Off, Standby (Automatic sleep/wake based on signal presence)
ADC & DAC:
16 bits
44.1 kHz Sampling frequency
Total propagation delay from input to output < 30 μs
Amplifier Requirements:
75 Watts peak power
90 dB SNR
0.1% THD

22. Performance Requirements
Mechanical Interface
Withstand standard shipping stresses/shocks
Maximum drop height 8’
Withstand vibration from speaker (20 Hz – 20 kHz)
Product Dimensions
Transmitter, 6” W x 2” H x 6” L,
Receiver, 9” W x 3” H x 9” L
Product Life
5 years
90 day warranty

23. Standard Requirements
Competitors
Kenwood RFU-6100 Wireless audio $200
Jensen JV-2400 Wireless audio/video transmitter $120
Temperature Ranges
Operating Temperatures 10°C – 40°C
Storage Temperatures -10°C –70°C
Humidity Ranges
Operating and Storage percent humidity 2% – 98%

24. Business Case Estimated Selling Price: $100
Estimated Annual Sales Volume: 500,000
Estimated Per Unit Cost of all Parts and Materials: $15
Estimated Per Unit Cost of Assembly, Test and Mfg: $20
Estimated Total Development Cost
Labor and Material assuming 1 hr of Eng = $150
$150(800 hrs) + $35(500,000) = $17,620,000

25. Business Case Calculated Annual Sales: $100 × 500,000 = $50,000,000
Calculated per Unit CM: $100 – $35 = $65
Calculated CM%: $65/$100 = 65%
Calculated Annual CM = 65% × $50,000,000= $32,500,000
Calculated ROI Time in Years:
$17,620,000 / $32,500,000 = 0.54 years