ADXL345 3-Axis Accelerometer Module

The ADXL345 is a low-power, 3-axis MEMS accelerometer modules with both I2C and SPI interfaces. The Breakout boards for these modules feature on-board 3.3v voltage regulation and level shifting which makes them simple to interface with 5v microcontrollers such as the Arduino. The ADXL345 features 4 sensitivity ranges from +/- 2G to +/- 16G. And it supports output data rates ranging from 10Hz to 3200Hz.

Specifications :

• 3V-6V DC Supply Voltage
• On-board LDO Voltage regulator
• Built-in Voltage level convertor (MOSFET based)
• It can be interface with 3.3V or 5V Microcontroller.
• Ultra-Low Power: 40uA in measurement mode, 0.1uA in standby@ 2.5V
• Tap/Double Tap Detection
• Free-Fall Detection
• SPI and I2C interfaces
• Measuring Range: ±16g
• Measuring Values (-16g to +16g):
• X: -235 to +270
• Y: -240 to +260
• Z: -240 to +270

The ADXL345 Breakout has an I2C address of 0x53. It can share the I2C bus with other I2C devices as long as each device has a unique address. Only 4 connections are required for I2C communication:

Pin Configuration :

• GND->GND
• VIN->+5v
• SDA->SDA (Analog 4 on “Classic Arduinos”)
• SCL->SCL (Analog 5 on “Classic Arduinos”)