The new version of this shield allows for either 3.3 or 5v logic, a separate and more robust VIN connection, and the PWM input has moved to pin 3. Project description, more information and ordering can be found at https://www.sparkfun.com/products/9815 L298 H Bridge data sheet: http://www.sparkfun.com/datasheets/Robotics/L298_H_Bridge.pdf Example Arduino sketch: http://dlnmh9ip6v2uc.cloudfront.net/downloads/Ardumoto/ardumoto_example.ino Assembly Guide: http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=183 Quickstart Guide: http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=195