SparkFun Triple Axis Accelerometer Breakout - ADXL345

SparkFun's Triple Axis Accelerometer Breakout - ADXL345 is a compact and ultra-low power MEMS accelerometer. It comes with two additional standoff holes and an extra decoupling capacitor. The ADXL345 boasts high-resolution (13-bit) measurements at up to +-16 g and its digital output data is formatted as 16-bit twos complement, accessible through either a SPI (3- or 4-wire) or I2C digital interface.

The ADXL345 is ideal for measuring static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (4 mg/LSB) enables it to measure inclination changes of less than 1.0 degrees.

The ADXL345 comes with several special sensing functions. It can detect activity and inactivity, indicating the presence or absence of motion and whether the acceleration on any axis exceeds a user-set level. It is capable of detecting single and double taps and can sense if the device is falling. These functions can be mapped to one of two interrupt output pins. The device also features an integrated, patent-pending 32-level first in, first out (FIFO) buffer that can store data to minimize host processor intervention. Its low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.

Features:

• Supply Voltage: 2.0-3.6VDC
• Ultra Low Power: 40uA in measurement mode, 0.1uA in standby@ 2.5V
• Detection of Tap/Double Tap
• Detection of Free-Fall
• SPI and I2C interfaces

Documents:

• Schematic
• Eagle Files
• Hookup Guide
• Datasheet
• Example Code (ATmega328)
• GitHub