Accessory Shield User Manual
Waveshare
11
V1.1.6, March 10
th
2015
2.2.6 3-axis accelerometer: ADXL345
The ADXL345 of ADI 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 m
g
/LSB) enables
measurement of inclination changes less than 1.0°.
It has the following features:
Power supply voltage range: 2.0V to 3.6V;
I/O voltage range: 1.7V to VCC;
Temperature range: -40
℃
to +85
℃
;
Dimensions: 3mm x 5mm x 1mm, LGA package.
Operation and phenomena:
Perform program compiling and uploading, and then click the button
to start
the serial port monitor of Arduino IDE. If the program is running properly, the monitor
will display the current accelerated velocity of the development board based on the
3-axis space position. When you rotate the development board, the outputted
sample value will change too, as the figure shows below.
