Mini Maestro 24-Channel USB Servo Controller
The 24-channel Mini Maestro 24 raises the performance bar for serial servo controllers with features such as a native USB interface and internal scripting control.
Whether you want the best servo control available (0.25μs resolution with built-in speed and acceleration control and pulse rates up to 333 Hz) or a general I/O controller (e.g. to interface with a sensor or ESC via your USB port), this compact, versatile device will deliver. Header pins are included but not soldered into this partial kit version (all surface-mount components are soldered).
more info: https://www.pololu.com/product/1357