Extruder Controller v2.0
This is one of the biggest changes in the RepRap Generation 3 electronics: A shift back to an extruder controller with an onboard microcontroller. In this case, we have an atmega168. That means this board can and will be programmed to act just like an Arduino, making it very easy to control it.
More info at: make.rrrf.org/ec-2.0