That mechanism is already here :O?
Put a few levers on your machines, turn them on, Done!
Sorry, forgot to mention, that I have a version 2.1, not 3.0 (didn't update server+client for a while). Was that included in the mod somewhere between 2.1 and 3.0 or I'm failing with my design? I have a Rotary Macerator connected to a LW supply and a redstone torch right next to it. RPM still drops to 0, if there is nothing to pulverize. Am I missing something simple? Also, I can't put a lever on top, because there is connected a BC pipe. Thanks.
UPD: Yes, with a lever on top works fine. What are my options? Is there another way to put in items from a BC pipe?
UPD 2: Ok, figured it out by myself. Lever on a side works too, but a machine doesn't react to a torch or a redstone wire. Is this intended behavior?