ADXL345 Triple Axis Digital Accelerometer Module

The ADXL345 Triple Axis Digital Accelerometer Module is a low-power, high-resolution 3-axis MEMS accelerometer. It features selectable measurement ranges, both SPI and I2C interfaces, and built-in activity/inactivity detection for versatile motion sensing applications.

Key Features

• 3-axis acceleration sensing with selectable ±2g/±4g/±8g/±16g ranges
• High 13-bit resolution at ±2g for precise measurements
• Ultra-low power consumption as low as 23μA in measurement mode
• I2C and SPI interfaces for flexible microcontroller integration
• Tap and double-tap detection built into hardware
• Activity/inactivity detection for power management
• Free-fall detection capability for drop sensing

Technical Specifications

Applications

• Tilt sensing and inclinometer applications
• Shock and vibration detection in machinery
• Handheld device orientation sensing
• Sports equipment performance monitoring
• Free-fall detection in drones and portable devices
• Activity monitoring with tap/double-tap gestures

Important Notes

• Module includes voltage regulator for 5V input compatibility
• Library available: Adafruit_ADXL345 or SparkFun_ADXL345
• Calibrate zero-g offset for your application orientation
• Higher data rates consume more power – balance as needed
• SPI mode provides faster data rates than I2C