This is probably the smallest Arduino controller speically designed for controlling the servo. It features a 12 standard servo control capbility with Xbee socket which can be used to control helicopter or UAV via the Xbee link. The feather weight (7.5g) make it an ideal controller for those application that has limited payload. The build in regulator is allow the input voltage vary from 3.5-8V which fits the most power supply without any modification.
Veyron Servo Driver (24-Channel) is a multiple servo controller, especially designed for humanoid robots, spider robots, robotic arms, and many other likewise applications. The controller integrates wireless data transmission interface, which is fully compatible with DFRobot Bluetooth module, APC220 wireless data transmission module and Xbee module.