LIS3DH Accelerometer

Image courtesy of Adafruit

An accelerometer is one of three common positioning sensors that you might find in a modern smartphone (the other two being a gyroscope and a magnetometer). The STMicroelectronics LIS3DH can measure linear acceleration in X/Y/Z. You can connect it to your Arduino using an I2C or and SPI interface.

Download the STMicroelectronics LIS3DH Datasheet (PDF)

Buy the LIS3DH Breakout Board from Amazon or Adafruit.