This is a Arduino-compatible autopilot board designed by Chris Anderson and Jordi Muñoz of DIY Drones using the new ATMega328. This board was used to win the annual put on by SparkFun. X, Y and Z rangefinders We highly recommend the following items to accompany this product: Project description, more information and ordering can be found at https://www.sparkfun.com/products/8785 EM406 GPS module: /commerce/product_info.php?products_id=465 FTDI BasicFTDI cable: /commerce/product_info.php?products_id=9873http://www.sparkfun.com/products/9717 EM406 GPS cable: /commerce/product_info.php?products_id=9123 Expansion Board: http://store.diydrones.com/ProductDetails.asp?ProductCode=KT-0001-01 XY and Z sensors: http://store.diydrones.com/ProductDetails.asp?ProductCode=SE-0002-01 ArduPilot Project Homepage: http://ardupilot.com/ DIY Drones Community: http://diydrones.com/ ATtiny Firmware: http://code.google.com/p/ardupilot/