ADXL345 from Analog Devices is a triple-axis accelerometer with digital I2C and SPI interface breakout. We added an onboard 3.3V regulator and logic-level shifting circuitry, making it a perfect choice for interfacing with any 3V or 5V microcontroller such as the Arduino.
The sensor has three axes of measurements, X Y Z, and pins that can be used either as I2C or SPI digital interfacing. You can set the sensitivity level to either +-2g, +-4g, +-8g, or +-16g. The lower range gives more resolution for slow movements, the higher range is good for high-speed tracking. The ADXL345 is the latest and greatest from Analog Devices, known for its exceptional quality MEMS devices. The VCC takes up to 5V in and regulates it to 3.3V with an output pin.
Fully assembled and tested. Comes with a 9 pins 0.1″ standard header in case you want to use it with a breadboard or perfboard. Two 2.5mm (0.1″) mounting holes for easy attachment.