Capstone Design Project EE 318-595 Capstone Design Project Spring 2005 Team #3: RF Weather Buoy Nole Martin Paul Simons Eric Ritzke Tom Reuter Steven Krol Murtadha Tunis 1

RF Weather Buoy Features Wind speed Wind direction Barometer Safety lights GPS Solar power Humidity sensor Water quality analyzer Cost effective Essential weather info

Block Diagram Eric – Green Paul - Yellow Solar Recharging Battery Pressure Sensor 4 6 5 1 Microprocessor 2 3 10 LED w/ Controls 7 9 8 11 Outdoor Unit (Buoy) Indoor Unit (Display) Eric – Green Paul - Yellow Murtadha – Orange Steve – Light Blue Nole – Red Tom – Dark Blue Data Lines Wireless Link Power Lines

System Level Requirements System Performance Requirements: Max Display Viewing Distance 3m Max Buoy Lighting Perception Distance 1,000m Number of Numeric Displays 10 Number of Lines of Displays 4 Buoy Functional Modes Active, Sleep Display Functional Modes Active Min SNR 35dB Max Noise 5nV/rtHz Min Transmission Distance 100m Max Buoy Power Current 1A

System Level Requirements System Standard Requirements: Mechanical: Max. Product Vol. 1,000,000 cm^3 Max. Shipping Container Vol. 1,100,000 1,000,000 Max. Shipping Container Vol. Max. Product Mass 40kg Max. # of PCB’s 4 Max. Total PCB Area 500 cm^2 Max. Shock Force 12.0 G’s Max. Shock Repetitions 6 Environmental: Operating Ambient Temp. Range -5°C to 70°C Operating Ambient Humidity Range -1000m to 20000m 0%Rh to 100%Rh Operating Altitude Range Storage Ambient Temp. Range -20°C to 80°C Storage Ambient Humidity Range 0%RH to 100%RH Storage / Shipping Altitude Range -1500m to 30000m

System Level Requirements System Standard Requirements: Manufacturing: Min. Total Parts Count 150 Max. Unique Parts Count 65 Max. Parts & Materials Cost $300 Max. MFG Assembly / Test Cost $50 Life Cycle: Est. Max. Production Lifetime 5 years Product Life Reliability in MTBF Full Warranty Period 1 years Market: Est. Total Market Size $700,000 Est. Annual Vol. 1,000 Min. List Price $700 Max. Product Materials Cost $300 Max. Product MFG Cost $50 Power: Buoy Power 8V to 18V Solar Panel AC/DC Adapter 3.3V to 8.7V Max. Total Power 50W