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Electrical Engineering 595 Capstone Design Project University of Wisconsin-Milwaukee

Electrical Engineering 595 Capstone Design Project University of Wisconsin-Milwaukee February 10, 2005. Team #2: Staff. Eenas Omari Ayodeji Opadeyi Kevin Erickson Brian Felsmann Rick Ryer. BSEE BSEE, BSCS BSEE BSEE BSEE. Team #2: Expertise & Experience.

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Electrical Engineering 595 Capstone Design Project University of Wisconsin-Milwaukee

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  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 • BSEE • BSEE • BSEE

  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 SystemBlock 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 SystemBlock 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. 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 ADC (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 – 132 V @ 57-63 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. 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 Business Case

  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

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