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Linkerkit Triple-Axis Analog Accelerometer Module

With an ADXL345 3 axis accelerometer from Analog Devices built onto this Linkerkit module enables your project to sense possition in all three axis. By sensing the gravity in all three axis, your project can calculate if it's level, rolling, pitching, if it's moving up, down or sideways. Or if it's sitting still, flat and level.

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The ADXL345 is a small, thin, ultralow power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface.

The ADXL345 is well suited for mobile device applications. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (3.9 mg/LSB) enables measurement of inclination changes less than 1.0°.

Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion by comparing the acceleration on any axis with user-set thresholds. Tap sensing detects single and double taps in any direction. Free-fall sensing detects if the device is falling. These functions can be mapped individually to either of two interrupt output pins.

An integrated, patent pending memory management system with a 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption.

Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.

The Linkerkit module or breakout board has all the additional components needed for the ADXL345 to operate via the I2C bus. The board utilises a 4 pin Grove interface (3-5V) allowing it to interface directly with 5V systems or 3.3V systems without the need for additional interfacing components. The I2C pins are broken out to a 4 way, 0.1” pitch male header which also has the 5V and GND lines.


  • Wide power range DC3V to 5V
  • Grove module
  • 3 axis sensing
  • I2C digital interface
  • High sensitivity
  • Small, low-profile package: 14-Terminal LGA
  • Low power 0.1 μA in standby mode at VS = 2.5 V (typical)
  • 10,000 g shock survival
  • RoHS/WEEE lead-free compliant

Application idea’s:

  • Motion Sensor
  • Shock detector
  • Vibration sensor
  • Toy car
  • Robotics
  • Disk drive Shock Protection
  • Game Controller

Usage considerations and cautions

The sensor is tested post manufacture, however at times there may be a small offset which can be adjusted by altering the offset register. Please refer to the data sheet for instructions.

If using the sensor with the polarised Linkerkit cables plugged into the Linkerkit baseboard, please see pictures for correct orientation to avoid damaging either your preferred controller board or the sensor board.

LKT-00208 ADXL345 board with connector

Note this side of the plug you can see the metal contacts.

LKT-00208 ADXL345 board with connector

This side of the plug has the two plastic raised strips and the metal contacts are not visible like the other side.

High level approach to setup and continues reading

Register 0x31—DATA_FORMAT (Read/Write)




















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