Bill Harned

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• Bill Harned
• Senior Design II
• Spring 2003

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Team

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

• Faculty Advisor
• Dr. Raymond Winton
• Sponsors
• Mike Gowan
• Michael Dean

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Project Overview

• Problem
• Duck hunters must manually place duck decoys in
  the water.
• Requires the use of a boat.
• Decoys do not exhibit any lifelike appearance.
• Solution Provide a remote controlled duck decoy
  with autonomous capability

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Previous Project

• Design
• Two DC motors (H-Bridge)
• 9.6 V Rechargeable battery pack
• Operation at 27 MHz
• Features
• 10 hours of operation
• 45 yard range
• Tow 3 decoys

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Previous Project

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

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Improvements

• Use of a single motor and rudder
• More than 10 hours of battery life
• Autonomous Movement
• Variable Speeds
• Operation at 75 Mhz

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Transmitter Features

• Futaba FP-4NL
• Automated Route System
• Microcontroller PIC16F627
• R2R ladder
• Mode switch
• Reset button
• Four routes
• One user-defined route
• Emergency stop
• Range of 65 yards

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Summary
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Receiver Components

• Generic Decoy 10.7x5.8x6.2 in.
• Single DC Motor
• 20 turn
• 192 gcm torque rating
• Servo S3003
• 3.2 kgcm torque rating
• 8 mA current drain
• 7.2 V Rechargeable Battery
• Weight 3.2 lbs.

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Summary
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System Block Diagram
CH1
CH2
Transmitter Circuit
Mode Switch
Route Circuit
12 volts (8 AA batteries)
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Pot Readings
Denotes the use of a speed controller which
neglects backward movement
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Schematic
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R2R Ladder Circuit (DAC)
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Software Design

• Initialize register configurations
• Endless Loop (forever)
• Detect Digital Input (button press)
• if (button is true)
• latch binary input to output pins
• call delay routine (seconds)
• end if
• end loop

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Software Flowchart
Ch1 2.5v, Ch2 2.5v
Route
1
2
3
4
Ch1 2.5v Ch2 3v
Ch1 2.5v Ch2 3v
Ch1 2.5v Ch2 3v
Ch1 2.5v Ch2 3v
8 second delay
8 second delay
1 second delay
8 second delay
Ch1 3v Ch2 3v
Ch1 2v Ch2 3v
Ch1 2.5v Ch2 2.5v
Ch1 2.5v Ch2 3v
4 second delay
4 second delay
i3?
1
0
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Emergency Stop

• Stop/Reset Button
• If a route needs to be halted during an
  active state, this feature will stop executing
  the active route.
• Take advantage of using the master clear enable
  pin
• Must use external clock

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User-defined Route

• User can also record his/her own route
• Constraint is the total memory available in the
  PIC for route storage
• Record procedure records input for 15 seconds
• User can use play button to execute the route

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Transmitter User Interface

• Front
• Power Switch
• 2 Control Switches
• Power LED
• Back
• Route buttons with labels
• Mode switch between automatic and manual

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Current Drain of Transmitter
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Summary
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Cost per 1000 units
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Summary
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PCB Layout

• Add Picture

• PCB Dimensions
• 3.25x2.75x.6
• Receiver Box Dimensions
• 3.5x3.5x1.5

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Summary
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System Demo

• Video clip of the decoy executing the automated
  routes.

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Acknowledgements

• We would like to thank the following people
• Bill Buchanan
• Raymond Winton
• Billy Collier
• Way Beng Koay
• Michael Dean
• Mike Gowan
• MFJ Enterprises

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Questions?