Adafruit 1231 ADXL345 Triple-Axis Accelerometer

The Adafruit ADXL345 Triple-Axis Accelerometer is a neat 3-axis accelerometer with adjustable sensitivity and a choice of either I2C or SPI bus connectivity. Select from ±2, 4, 8 or 16g sensitivity; ±2g gives a higher resolution for slow movements while ±16g is best for high speed tracking. It can be configured to detect a single tap, a double tap and free-fall.

Supplied as a fully assembled and tested accelerometer board plus a strip of 0.1in. pitch header pins for you to solder on as required. Adafruit provide a free tutorial and an open source Arduino library to help get you started. If you aren't familiar with installing libraries into the Arduino IDE, follow Adafruit's simple guide. The library is well structured and it should be possible to port to other microcontrollers without too much effort.

• ADXL345 3-axis 13-bit accelerometer with optional 10-bit mode
• Tap, double tap and free-fall detection
• I2C and SPI compatible
• On board 3.3V regulator, 5V DC input
• 2 x mounting holes
• Dimensions 25 x 19 x 3.14mm (0.95 x 0.75 x 0.12in)
• Adafruit part no.: 1231

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.