The Serial Accelerometer Dongle is a 3 axis accelerometer up to +/-6g with a simple serial interface. The Serial Accelerometer Dongle has a variable baud rate, a factory reset command, and a complete triple axis measurement system based on the MMA7361 sensor from Freescale. Power is gained from any RS232 port (including USB-to-RS232 converters) so no external power supply is needed. The new version replaces the onboard PIC with an ATMega328 . The board has software configurable settings to select between 2 different sensing ranges (+/- 1.5 and 6g). Project description, more information and ordering can be found at https://www.sparkfun.com/products/10537 Datasheet: http://www.sparkfun.com/datasheets/Components/General/MMA7361L.pdf Firmware: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Accelerometers/Accelerometer-Dongle_ATM_Firmware.zip