1. FM CONVERTER

2. Team Members Dan Harkins Team Leader Beau Blackwell George Henry Shawn Welch Dr. Georgios Lazarou Advisor

3. Team Responsibilities

4. Project Significance Car radios do not have audio inputs Many cars only have a CD or cassette player FM converter can be used with FM radio Keeps the owner from having to buy and install entire audio system

5. Current Technology Options Cassette adapters are the most widely used means to play one audio device through another Cassette Player Adapters Existing tape player needed Excess wiring can get in the way Limited signal quality

6. Design Diagram Signal from Audio Device Transmit Converted FM signal to FM receiver Process Signal (Convert to FM Signal)

7. Implementation

8. Design Specifications 1. Operating Frequency: Operate throughout on the standard FM radio range (87.9-107.9 MHz) 2. Weight: Target weight is eight ounces 3. FCC Requirements: Must be compliant with Part 15 of FCC regulations 4. Signal Clarity: The unit will be able to broadcast a stereo signal through the air 5. Packaging: Final product will be approximately 5” x 3” x 3” 6. User Interface: The unit will feature: push-button style tuner LCD to display the operating frequency Input signal LED

9. Design Specifications 7. Durability: Must be resilient to the bumps and bruises that can occur to a portable device. 8. Power Requirements: Will operate off: Four AA batteries AC converter 12V DC Adapter 9. Cost: Prototype Components:$80 – 90 Mass production costs approximately 10- 20% of our prototype cost 10. Audio Input: The converter will use RCA audio inputs.

10. Benefits of RCA Connection Cord more commonly used and widely available Greater versatility: –RCA inputs offer the possibility to use both RCA and headphone outputs Increased cord life –Cords can be removable for storage –User can replace worn or damaged cord without having to replace the entire unit

11. Benefits Over Tape Adapters Portability –No wires to connect to FM receiver –Light-weight –Can be used with any FM receiver Signal Clarity – No tape “hiss” – Low interference – Automotive design minimizes interference

12. Benefits of FM vs. AM More widely used than AM radio –Consumers more familiar with FM dial Better signal to noise ratio Less interference than AM radio –Nearby electronic devices can cause “noise” –Even weather can cause static on AM radio

13. Typical Decibel S/N Ratios AM broadcast / telephone: 25 dB (worst) Audio Cassette Player: 35-45 dB FM broadcast : 50-60 dB Compact Disc: 90-105 dB (best)

14. Design Constraints Radio Frequency Signal Strength Operation Voltage Antenna Efficiency Signal to Noise Ratio Reliability Pspice  Matlab   Performance Test   O- Scope      Spectrum Analyzer  Test Specifications

15. Simulation

16. JanFebMarAprMay AugSepOctNovDec Prototype Simulation Performance Testing Debugging Research Final Documentation

17. FM CONVERTER