ECE 492 - Computer Engineering Design Project
Duck Hunt Game
Jesse Larson, Qingqing Liu, and Jing Lu
Game Overview
2014
Component Overview
The simple purpose of this game is to “shoot” the duck toy
as quick as possible to win the game. However “shooting” a
stationary duck would be too easy, so to add some difficulty,
the duck moves.
Motor controller components
Top left – DE2 board
Top right – Stepper motor
amplifier circuit
Bottom – Stepper motors
The duck swings left and right by using stepper motors to
vary the length of the two strings the duck is connected to.
Additionally, the game can detect two different styles of
infrared hits so it can be played in 2 teams. The target itself
must be hit by an infrared shotgun pulse three times to finish
the game. Therefore once a player or team hits the target
twice they will win the game.
Fig. 2 Motor Controller Components
Game Overview
The infrared components.
Top right – the sensor bar
Top left – the 56 KHz
receiver for DE2
Bottom – the gun infrared
transmitter
KEY 3 – Starts the game immediately
KEY 2 – Starts the game after a delay of 10 seconds
KEY 1 – The duck becomes invincible for a minute shoot as
many times as you can to record your high score!
KEY 0 – Shuts off the game and returns the duck to its start
position
Infrared Communication Overview
The infrared communication consists of 3 main components.
The gun, sensor bar, and a receiver on the DE2 board.
The Gun
The gun interface consists of two buttons and one switch,
the gun can emit 2 different length 38 KHz infrared pulses.
One button loads the transmitter , while the second button
serves as a trigger to fire the transmitter. The switch serves
to select which gun id to shoot at the transmitter.
The Sensor Bar
The sensor bar serves to change the 38KHz infrared pulse
transmitted by the gun into a 56 KHz pulse the infrared
receiver on the DE2 can detect.
DS 1077
Fig. 3 Infrared Components
38 KHz
infrared pulse
from gun
Stepper Motor Overview
TSOP 853
56 KHz
infrared pulse
to DE2
N
O
R
The stepper motor is controlled by half step wave forms for
smoother motion then offered by full step control.
Fig. 4 How the sensor bar works
The DE2 performs calculations while moving the sensor bar
to insure the velocity and acceleration of the bar do not
exceed the stepper motors torque limit. This calculation
minimizes the number of lost steps thus allowing the DE2
board to know the location of the sensor bar to a reasonable
accuracy.
Fig. 1 Duck
The DE2 Receiver
Simply consists of a 56 KHz infrared receiver coupled with
some supporting hardware to eliminate spurious outputs
from the receiver.
Department of Electrical & Computer Engineering