Electrical Engineering 595 Capstone Design Project University of

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

Capstone Design Project Team #2: Staff • • • Eenas Omari Ayodeji Opadeyi Kevin Erickson Brian Felsmann Rick Ryer • • • BSEE, BSCS BSEE

Capstone Design Project 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.

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

Capstone Design Project Team #2: Decision Making • First Decision Attempt: Consensus of the entire team • Second Decision Attempt: A team member vote, majority rules

Capstone Design Project 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 P 1 -P 4 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.

Capstone Design Project Ideas • • MP 3 Players DJ Audio Lighting System RF Shopping check-out system Wireless surround system

Capstone Design Project MP 3 Players Project Key Features • Custom built MP 3 player with a small LCD display showing artist and title of current song being played. • Ability to transfer music from one MP 3 player to another MP 3 player or computer using infrared technology. • MP 3 player will use compact flash cards to store files. Requirements • Rechargeable battery system • Small size and sturdy construction for durability

Capstone Design Project MP 3 Block Diagram Audio Amplifier LCD Display MP 3 Decoder Microcontroller Compact Flash Storage Rechargeable Battery System All blocks will need a power source Infrared Transceiver

Capstone Design Project DJ Audio Lighting System Key Features • Will create custom lighting effects based on the music being played. • Music will be sampled 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

Capstone Design Project DJ Audio Lighting System Block Diagram Lighting Relays Analog Input ADC DSP/FFT Power Supply & Circuit Protection Microcontroller

Capstone Design Project 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

Capstone Design Project RF Check-Out System Block Diagram Computer Interface And Database FOB RF Transceiver Power Microprocessor

Capstone Design Project Wireless Surround 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 system without an expensive receiver/amplifier. • Uses existing speakers of a wired surround system. Requirements • Analog inputs from receiver (left and right rear channels) • Easy to setup and install

Capstone Design Project Wireless Surround System Block Diagram IR Receiver/Amplifier Power Supply Right and Left Rear Analog Channel ADC IR Transmitter Audio Amplifier IR Receiver DAC Left Rear Channel Right Rear Channel IR Receiver Transmitter Power Supply DAC IR Receiver/Amplifier Power Supply Audio Amplifier

Capstone Design Project Proposed Project Wireless Surround System

Capstone Design Project Proposed Project Wireless Surround 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

Capstone Design Project 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

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

Capstone Design Project 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

Capstone Design Project Performance Requirements Operation Modes: – On/Off, Standby (Automatic sleep/wake based on signal presence) ADC & DAC: – 16 bits – 44. 1 k. Hz Sampling frequency – Total propagation delay from input to output < 30 μs Amplifier Requirements: – 75 Watts peak power – 90 d. B SNR – 0. 1% THD

Capstone Design Project Performance Requirements Mechanical Interface – Withstandard shipping stresses/shocks – Maximum drop height 8’ – Withstand vibration from speaker (20 Hz – 20 k. Hz) 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

Capstone Design Project 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%

Capstone Design Project 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(800 hrs) + $35(500, 000) = $17, 620, 000

Capstone Design Project Business Case • • • Calculated Annual Sales: $100 × 500, 000 = $50, 000 Calculated per Unit CM: $100 – $35 = $65 Calculated CM%: $65/$100 = 65% Calculated Annual CM = 65% × $50, 000= $32, 500, 000 Calculated ROI Time in Years: $17, 620, 000 / $32, 500, 000 = 0. 54 years