Disc Golf Disc Locator

sillysepiaElectronics - Devices

Nov 27, 2013 (3 years and 11 months ago)

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Disc Golf Disc Locator

Trevor Henry

Project Advisor: John Spinelli

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

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)





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

Design Process
:
Adding
Weight Experiment

Quarters added to
Disc

Avg. Distance

(5
throws)

0

153 feet

1

155 feet

2

158 feet

3

163 feet

4

168 feet

5

170 feet

1 Quarter = 5.6 grams

Conclusion
: About 28 grams can be added to disc

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

Diagram of Project:

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


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

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

Experiment 2:
Communication Distance

Distance Apart

No 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


Experiment 2:
Communication Distance

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

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


What I learned:


Read data sheets carefully


How to set up voltage sources correctly


Time is deceiving

Acknowledgements


Advisor: Professor John Spinelli


Lab Manager: Gene Davison

Questions?