Purecrea Accelerometer ADXL345 GY-291

The ADXL345 (GY-291) is a small, thin, and extremely power-efficient 3-axis accelerometer with a high resolution (13-bit) for acceleration values of ±16 g. The measurement range can be adjusted to ±2 g, ±4 g, ±8 g, or ±16 g. The measurement data is transmitted digitally via SPI (3- or 4-wire) or I2C interface. Due to its low power consumption, the ADXL345 is well-suited for mobile device applications. The module can also be easily mounted using the two designated mounting holes. The ADXL345 is suitable for both static applications for measuring gravitational acceleration (tilt applications) and for dynamic acceleration, movement, or shock. Its high resolution (4 mg/LSB) allows for the measurement of tilt changes of less than 1 degree. The sensor also features special functions such as activity measurements (motion detected, adjustable via a threshold), inactivity measurements (no motion detected), touch detection, and free fall detection. These functions can be individually assigned to one of two output pins for interrupts. For example, a free fall of the sensor can be assigned to an interrupt on the Arduino board for evaluation.

Technical details:
Operating voltage: 3-5 V
SPI & I2C bus
Sensitivity on 3 axes: from ±2 g to ±16 g
13-bit resolution
Motion detection for single and double taps
Free fall detection
Mounting holes: 2x 3 mm (hole spacing 15 mm)
Size: 20.4 mm x 15.8 mm
Weight: 1.5 g

Package includes:
1x ADXL345 module
1x straight pin header.