Interactive Motorized Duck Decoy

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Interactive MotorizedDuck Decoy

• Kevin Brumfield
• Senior Design I
• Fall 2002

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Team

• Team Leader
• Kevin Brumfield
• Team Members
• Bill Harned
• Abdul Mohamed
• Mark Williams

• Faculty Advisor
• Dr. Jeff Casady
• Sponsors
• Mike Gowan
• Michael Dean

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Abstract

• Our goal is to design an improved radio
  controlled duck decoy. The duck decoys features
  will consist of variable speeds, ability to tow
  other decoys, and preprogrammed routes for
  hands-free operation.
• By doing so the decoy will provide a more
  effective and enjoyable means of duck hunting.

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Task Breakdown
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Previous Project

• Design
• Two DC motors (H-Bridge)
• Rechargeable battery pack
• Operation on one frequency

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Previous Project

• Requirements
• 10 hours of operation
• 45 yard range
• Tow 3 decoys
• Operation on a single frequency

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Previous Project

• Problems
• Straight Movement
• Battery Life
• Control
• Circuit Stability

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New Design

• One DC motor to operate propeller
• One servo motor to operate rudder
• Standard AAA batteries (rechargeable) or 7.2
  rechargeable battery pack
• Variable Speed control
• Pre-programmed routes
• Operation at different frequencies
• Implement the use of a keel

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Improvements

• Longer battery life
• Programmed movement
• One-hand operation
• More than one duck operating at a time
• Variable speeds
• Better maneuverability

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Requirements

• RF Transmitter/Receiver System
• Operating frequency of 75 MHz
• Range
• Operation of over 150 feet (50 yards)
• Load Capacity
• 4 plastic decoys

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Requirements

• Range of motion
• DC motor
• Rudder

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Controller Chart
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Transmitter

• Back of Transmitter

• Chip Integration

4-input Switch
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Programmable route variables

• Channel 1 (Ch1) 4 low order bits of
• 8-bit output
• Channel 2 (Ch2) 4 high order bits of
• 8-bit output

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Requirements

• Preset Movement
• Movement of the four programmed buttons

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Software Flowchart
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Chip Integration

• Powered through existing remote control power
• Requires a 5V voltage regulator
• Integrated to transmitter via switch
• Switch from preprogrammed routes to joystick

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Microcontroller

• PIC 16F627
• Provides timing functionally
• Space (memory) for custom programming
• Compiling software included
• University provides equipment to program chip

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Digital to Analog Conversion

• DAC needed from PIC to transmitter
• Can build DAC using R2R ladder
• Cost efficient
• Customizable to our needs

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Example of Route

• To implement a L shaped pattern (12 seconds)
• Ch. 2 (DC motor) will run the entire duration (12
  sec.)
• Ch. 1 (servo motor / rudder) will not run until 8
  sec. has passed, then run for 4 sec.

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Decoy Chart
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DC Servo Motors

• DC Motor
• 20 Turn Double Wound
• 30 faster than the typical stock motor
• less windings produce a faster motor
• Double wound produces more Torque
• Servo Motor
• General purpose needed
• Cost effective

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Requirements

• Power for decoy and remote
• Power to last for one day of hunting (est. 6-7
  hours)
• Frequency Change
• Implemented through the use of a crystal change
• Cost
• 180 Selling price of the decoy
• Competitive cost with todays market

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Circuit Prototype
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Duck Decoy Prototype
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Summary

• Build a better decoy than what is currently on
  the market
• More functionality
• Live duck characteristics
• Cost effective

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Acknowledgements

• We would like to thank the following people
• Bill Buchanan
• Jeff Casady
• Billy Collier
• Michael Dean
• Mike Gowan
• MFJ Enterprises

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Questions?