The Open CM9.04 B is the new open source microcontroller from ROBOTIS. This controller is powered by a 32bit ARM Cortex-M3 processor. Any 3-pin TTL DYNAMIXEL servo can be used with the Open CM9.04 B. OpenCM9.04-B.
The Dynamixel MX-28R RS-485 Servo is the newest generation servo from Robotis. Equipped with an ARM Cortex M3 features a PID control algorithm and provides feedback information such as speed, temperature, position and load.