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Published byShana Hawkins Modified over 9 years ago
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Disc Golf Disc Locator Trevor Henry Project Advisor: John Spinelli
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What is Disc Golf and Why this project? What is Disc Golf? Outdoor sport played much like the game of golf Object is to throw the disc into the chain basket in as few throws as possible Why this Project? Save Money Save Time
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Goals of the Project: Handheld device Battery powered Visual information to tell distance and direction Easy to use Disc with a Chip Transmits signal using battery power Has negligible interference with flight Transmitter + Disc < 200 grams (max weight rule)
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Disc Used: Innova Star Gator Mid-Range Disc Diameter = 21.2 cm Wing width = 1.3 cm Rim depth = 1.4 cm Weight = 172.2 grams
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Design Process: Adding Weight Experiment Quarters added to Disc Avg. Distance (5 throws) 0153 feet 1155 feet 2158 feet 3163 feet 4168 feet 5170 feet 1 Quarter = 5.6 grams Conclusion : About 28 grams can be added to disc
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Design Process: Choosing Wireless System RFID (Radio Frequency Identification) Passive or Active Active Transmitter Phased Array Directional Antenna What I chose: Active Transmitter & Directional Antenna
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Diagram of Project:
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What I chose: Transmitter RF Link Transmitter 434 MHz Amplitude Shift Keying Range 500 ft. (perfect conditions) Supply Voltage: 3V – 12 V Weight: < 1 Quarter Height: < 1 inch Width: <.5 inch
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What I chose: Receiver RF Link Receiver 434 MHz Amplitude Shift Keying Range 500 ft. (perfect conditions) Supply Voltage: 5V Height: < 2 cm Width: < 2 inches
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First Step: Communication of Transmitter and Receiver Using the data sheets of the chips, the chips were set up and powered on a breadboard Tried a non wave signal for input data on transmitter This did not yield an output on the receiver Used a 2V peak to peak square wave signal with 1V DC offset Yielded a readable output
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Experiment 2: Communication Distance Distance ApartNo Antenna Output Readings Antennae Output Readings About 5 ft.Min: 1.5V Max: 3V Min: 250mV Max:4.2V About 20 ft.Min: 1V Max: 3V Min: 300mV Max: 4V About 70 ft.Min: 1.94V Max: 2.6V Min: 780mV Max: 4V Used oscilloscopes and wave generators between rooms N106 & N100
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Experiment 2: Communication Distance
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Ongoing Tasks: Attaching Components to Disc 3V Button Cell to power transmitter Push button switch to make transmitter active Use a 555 timer or develop a square wave generator to input data Develop a casing such that components won’t be harmed when the disc is thrown
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Ongoing Tasks: Handheld Device Attach a switch to turn on and off the device Develop a directional antenna Connect antenna to receiver Use a 5v battery source Attach a voltmeter to receiver output so that the user can determine distance to disc
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What I learned: Read data sheets carefully How to set up voltage sources correctly Time is deceiving
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Acknowledgements Advisor: Professor John Spinelli Lab Manager: Gene Davison
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Questions?
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