arduino joystick wiring

Community General Discussion
1

I recently purchased an arduino compatible joystick, but i'm not sure how to wire it. I presume it needs an analog input and ground but there are 5 pins in total. Can anyone suggest what I need to plug into each of the pins? This is where I bought it from:

The pins are labelled: GND, +5U, VRx, VRy, SW.

Any help would be greatly appreciated.

2

From the sellers website:

Code:
#define JOYS_VRX_DIO A0 /* Selects the input pin for the joysticks X-Axis /
#define JOYS_VRY_DIO A1 / Selects the input pin for the joysticks Y-Axis */

#define JOYS_SW_DIO 2 /* Selects the input pin for the joysticks push button */

/* Initialises serial and DIO /
void setup()
{
/ Sets up the serial port for displaying the status of the sensor */
Serial.begin(9600);

/* Configures the DIO pin that the joysticks push button will be connected
to. As it has no pull-up we will need to enable the Arduino's internal pull-up */
pinMode(JOYS_SW_DIO, INPUT);
digitalWrite(JOYS_SW_DIO, HIGH); // turns on pull-up resistors
}

/* Main program loop /
void loop()
{
/ Reads the current position of the joysticks X & Y axis via the analogue pins */
Serial.print("X axis: ");
Serial.print(analogRead(JOYS_VRX_DIO));
Serial.print(" Y axis: ");
Serial.print(analogRead(JOYS_VRY_DIO));

/* Reads the state of the push button and if pressed, outputs the state to the
serial port */
if (!digitalRead(JOYS_SW_DIO))
{
Serial.println(" Button pressed !");
}else
{
Serial.println();
}
}

3

So VRx and VRy are connected to analog pins, SW is connected to a digital pin and GND is connected to ground. Is 5U+ connected to power and would I need to put a resistor in the circuit?

4

X and Y are connected to two analog pins +5v is connected to 5v pin on the arduino, it feeds the X Y input to read from. Something like all the way one direction 4.5v center 2v all the way the other direction 0.5v. The SW to a digital pin and ground to ground.
In software they are using the internal pull up so when you push the button you are giving it a easier (less resistance) path to ground, so no external pull up resistor is needed.