ADXL345 Triple Axis Accelerometer Sensor Module

The ADXL345 Triple Axis Accelerometer Sensor Module measures acceleration across selectable ranges with 10 to 13-bit resolution, outputting 16-bit two’s complement data over I2C or SPI, operating from 3V to 6V DC. The triple axis accelerometer is a standalone dedicated accelerometer — the same acceleration-sensing function bundled inside larger IMUs like the MPU-9250, but available here as a single-purpose module for projects needing only tilt and motion detection without gyroscope or magnetometer data.

A feature of the adxl345 sensor is that its resolution and measurement range are independently configurable — unlike many accelerometers where higher range automatically reduces resolution, this accelerometer sensor adxl345 lets engineers select a wider ±16g range for high-impact detection while still choosing higher resolution settings for finer measurement granularity within that range. The accelerometer sensor module’s dual I2C/SPI interface mirrors the same flexibility seen in the MPU-9250 — I2C for simple wiring on a shared bus, SPI for faster dedicated-line communication when sample rate matters.

The 3 axis accelerometer sensor’s data format uses 16-bit two’s complement values, where the most significant bit indicates positive or negative acceleration direction along each axis — understanding this format matters when writing raw register-reading code rather than relying on a library. A adxl345 triple axis sensor measures only linear acceleration and tilt (via gravity vector), not rotational rate or heading — applications needing full orientation tracking should pair it with a gyroscope and magnetometer. Well-suited for learners and makers, this ADXL345 module available at StemVolt, enables gesture recognition, vibration monitoring, and motion analysis projects.