The ADXL335 is an three axis analog accelerometer which outputs raw X, Y and Z axis values on three pins. Let's connect these to the analog input pins on Explore M3 and log the data to the serial monitor.

Hookup

Explore M3	ADXL335
5v	5v
GND	GND
A3	X axis pin
A2	Y axis pin
A1	Z axis pin

Code

This is a standard Arduino example that I will be using. We will make a tutorial some time later to do some math and put the accelerometer to good use.


	/*
	ADXL3xx

	Reference:
	http://www.arduino.cc/en/Tutorial/ADXL3xx

	The circuit:
	analog 0: accelerometer self test
	analog 1: z-axis
	analog 2: y-axis
	analog 3: x-axis
	analog 4: ground
	analog 5: vcc

	created 2 Jul 2008
	by David A. Mellis
	modified 30 Aug 2011
	by Tom Igoe

	This example code is in the public domain.

	*/

	// these constants describe the pins. They won't change:
	//const int groundpin = 18; // analog input pin 4 -- ground
	//const int powerpin = 19; // analog input pin 5 -- voltage
	const int xpin = A3; // x-axis of the accelerometer
	const int ypin = A2; // y-axis
	const int zpin = A1; // z-axis (only on 3-axis models)

	void setup()
	{
	// initialize the serial communications:
	Serial.begin(9600);

	// Provide ground and power by using the analog inputs as normal
	// digital pins. This makes it possible to directly connect the
	// breakout board to the Arduino. If you use the normal 5V and
	// GND pins on the Arduino, you can remove these lines.
	// pinMode(groundpin, OUTPUT);
	// pinMode(powerpin, OUTPUT);
	// digitalWrite(groundpin, LOW);
	// digitalWrite(powerpin, HIGH);
	}

	void loop()
	{
	// print the sensor values:
	Serial.print(analogRead(xpin));
	// print a tab between values:
	Serial.print("\t");
	Serial.print(analogRead(ypin));
	// print a tab between values:
	Serial.print("\t");
	Serial.print(analogRead(zpin));
	Serial.println();
	// delay before next reading:
	delay(100);
	}