2015/1/9
2­Axis Joystick | learn.parallax.com
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2‐Axis Joystick
Submitted by Gordon McComb on Tue, 05/08/2012 ­ 13:54
Microcontroller
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Gyroscope
Module 3­Axis
Item code: 27800
What It Can Do
Miniature two­axis analog joystick with up/down and left/right action
Spring­loaded movement always returns joystick to center position
Easy plug­in module for use in breadboards and custom circuits
The 2­Axis Joystick provides a simple and convenient way to add X­Y control to a
project. A potentiometer attached to each axis provides proportional feedback of the
up/down and left/right positions. The joystick is spring­loaded, so that it always returns
to its centered position when you release it.
Depending on the microcontroller you use, a small assortment of external components
is required to complete the connection. These are noted in the Parts List. Refer to the
appropriate diagram under Basic Wiring.
Parts List
2­Axis Joystick
BASIC Stamp HomeWork Board, Propeller QuickStart, or Arduino Uno
microcontroller
22 gauge solid conductor hookup wire
(2) 220 Ω resistors, 1/8 or 1/4 watt, 5% tolerance (BASIC Stamp and Propeller
interface)
(2) 0.01 μF ceramic disc capacitors (BASIC Stamp and Propeller interface)
Basic Wiring
Memsic 2125
Dual­axis
Accelerometer
PING)))
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Servo
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XBee Wireless
Pack
Using Arduino
Object Libraries
Using Propeller
Objects
Using the Parallax
Serial Terminal
Buy a Propeller
Board of Education►
Download Propeller
Tool Software►
Open the Propeller Q
& A►
BOE Shield
Resources
Arduino Support
Forum►
Interface: Dual 10 k Ω potentiometers with common ground
Power consumption: 0.01W
Dimensions: 1.64 x 1.2 x 1.1 in (41.67 x 30.54 x 27.7 mm)
Download Arduino
http://learn.parallax.com/KickStart/27800
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2015/1/9
2­Axis Joystick | learn.parallax.com
Software►
Program KickStarts
Open Arduino
Reference►
The examples in this KickStart display the instantaneous values of the X and Y
(Left/Right, and Up/Down) axes of the joystick. The values are displayed in a debug
window or serial monitor.
Buy BOE Shield­Bot
products►
The range of values returned is dependent on the type of interface used between the
joystick and microcontroller. The values noted below are approximate, and are based on
the circuitry described in Basic Wiring.
Microcontroller
Range
Center Position
BASIC Stamp
1–60
30
Propeller
0–6000
3000
Arduino
0–1023
512
BASIC Stamp HomeWork Board
Download BASIC Stamp 2 code for the 2­Axis Joystick
' {$STAMP BS2}
' {$PBASIC 2.5}
UDPin CON 8
LRPIn CON 9
LR VAR Word
UD VAR Word
DO
HIGH LRPin
PAUSE 2
RCTIME LRPin, 1, LR
HIGH UDPin
PAUSE 2
RCTIME UDPin, 1, UD
DEBUG HOME, "UD = ", DEC UD, ", LR = ", DEC LR, CLREOL
PAUSE 50
LOOP
Note: When this program is run the BASIC Stamp Debug
Terminal will automatically open.
Propeller QuickStart
http://learn.parallax.com/KickStart/27800
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2015/1/9
2­Axis Joystick | learn.parallax.com
Download Propeller Spin code for the 2­Axis Joystick
OBJ
pst : "FullDuplexSerial" rc : "RCTime"
CON
_clkmode = xtal1 + pll16x _xinfreq = 5_000_000
PUB Go | UD, LR pst.start(31, 30, 0, 115200)
repeat
rc.rctime(0, 1, @LR)
rc.rctime(1, 1, @UD)
pst.Str(String("UD = "))
pst.dec(UD)
pst.Str(String(", LR = "))
pst.dec(LR) pst.tx(13)
waitcnt(clkfreq / 2 + cnt) ' 1/2 second delay
Important! This program uses the FullDuplexSerial.spin
and RCtime.spin object libraries, which are included with
the Propeller Tool software download.
Note: To view the results of the demonstration, after
uploading is complete run the Parallax Serial Terminal
from the Run menu, or press F12. Momentarily depress
the Reset button on the Propeller QuickStart board to
restart the program.
Arduino Uno
http://learn.parallax.com/KickStart/27800
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Download Arduino 1.0 Code for the 2­Axis Joystick
Download Arduino Pre­release Version Code for the 2­Axis Joystick
This program code is compatible with Arduino 1.0 and earlier versions.
int UD = 0;
int LR = 0;
void setup() {
Serial.begin(9600);
}
void loop() {
UD = analogRead(A0);
LR = analogRead(A1);
Serial.print("UD = ");
Serial.print(UD, DEC);
Serial.print(", LR = ");
Serial.println(LR, DEC); delay(200);
}
Note: To view the results of the demonstration, after
uploading is complete click the Serial Monitor icon in the
Arduino IDE. This displays the Serial Monitor window.
Momentarily depress the Reset button on the Arduino
board to restart the sketch
For More Information
View the 2­Axis Joystick (#27800) product documentation.
The Parallax 5­Position Switch (#27801) provides another means of providing
navigational control to your project. See the 5­Position Switch KickStart here for
additional information.
Copyright: Creative Commons 3.0 SA license
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