This is an evaluation board for the ADXL345 three-axis accelerometer. The ADXL345 is an awesome little accelerometer, capable of measuring acceleration of up to ±16g at up to 13-bit resolution. The evaluation board includes everything you'll need to adjust the ADXL345's settings, and monitor and log its outputs. The on-board ATmega328 takes care of all the I2C/SPI communication with the ADXL345, and it will also log the x-, y-, and z-axis acceleration values onto a uSD card. The board includes a USB interface, which allows you to read/write any of the ADXL345's registers using a terminal emulator. The default baud rate is 57600bps (8-N-1). The UART pins are also broken out allowing a direct TTL interface with the processor. Power can be supplied by 2xAA batteries, or with a 3.0-3.3VDC power supply at the VCC/GND pins. The ADXL345 evaluation board does not include batteries, uSD card or a USB cable, check the related items section below for these products. The source code provided below is written in C and bundled with hex files ready to load, however we've also made an Arduino sketch available that returns values from the ADXL345 so that you can take advantage of the Bootloader. The Arduino sketch doesn't do anything with the on-board LEDs but it does operate the accelerometer. Project description, more information and ordering can be found at https://www.sparkfun.com/products/9814 Datasheet: http://www.sparkfun.com/datasheets/Sensors/Accelerometer/ADXL345.pdf Source Code: http://www.sparkfun.com/Code/ADXL345_Eval_v16.zip Arduino Sketch: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Accelerometers/ADXL345_Sketch.zip User Guide: http://www.sparkfun.com/datasheets/Sensors/Accelerometer/ADXLEvalBoard%20User_Guide2009-09-14.pdf FTDI Drivers: http://www.ftdichip.com/FTDrivers.htm