accelerometer help

Using Arduino Project Guidance
#1

Hi folks, im looking for some help

I have this acc module
http://www.lctech-inc.com/Hardware/Detail.aspx?id=053796b3-3b90-4fe5-8588-7b5d14bc0512

on an arduino pro mini Protosnap.

I have this code loaded

#include <AcceleroMMA7361.h>

AcceleroMMA7361 accelero;
int x;
int y;
int z;

void setup()
{
  Serial.begin(9600);
  accelero.begin(13, 12, 11, 10, A0, A1, A2);
  accelero.setARefVoltage(3.3);                   //sets the AREF voltage to 3.3V
  accelero.setSensitivity(LOW);                   //sets the sensitivity to +/-6G
  accelero.calibrate();
}

void loop()
{
  x = accelero.getXVolt();
  y = accelero.getYVolt();
  z = accelero.getZVolt();
  Serial.print("\nx: ");
  Serial.print(x);
  Serial.print("mV\ty: ");
  Serial.print(y);
  Serial.print("mV\tz: ");
  Serial.print(z);
  Serial.print("mV");
  delay(500);                                     //make it readable
}

when i run the code I get the following through serial:

x: 1672mV y: 1672mV z: 1878mV
x: 1672mV y: 1672mV z: 1878mV
x: 1672mV y: 1672mV z: 1878mV
x: 1672mV y: 1672mV z: 1878mV

all day long, it never changes. I have measured voltage at the analoge pins with a multimeter and they are more or less the same
but it looks like the acc module never changes the output, I have it wired as per the PDF included with the library from here : ç

http://code.google.com/p/mma7361-library/

There is a 3v3 pin , which I cannot find mention of in the PDF so I havent connected it,
other than that im stumped,
does anyone have any experience with this module ?
thanks in advance

#2

Well, I'm a total noob with 'Duino's but looking over the project documentation, maybe you should change this line:

accelero.setARefVoltage(5);

Since you are powering with 5v instead of 3.3v.

#3

Sweet, numbers are chaaaanging ,
thanks,
now to see if it actually works as expected

#4

Note that I edited my post, I think you do need that line, but change 3.3 to 5

#5