The MMA7455 accelerometer can measure acceleration in three axes. This sensor is commonly available as a breakout board that you can connect to your Arduino. It requires VCC, GND, SCA and SCL to be connected.

Features

• IIC / SPI and interfaces
• Z-axis self calibration
• 2.4 V - 3.6 V operation (onboard regulator; module operates from 5 V)
• programmable threshold interrupt output
• level detection for motion recognition (shock, shock & move, free fall)
• pulse detection for single pulse or double pulse recognition
• sensitivity: 64 LSB/g @ 2 g, @ 8 g in 10-bit mode
• selectable sensitivity (± 2 g, ± 4 g, ± 8 g) for 8-bit mode