I was wondering if it's possible to use an old motherboard/cpu as a microcontroller in a robot? It would be acting as an electronic speed controller. I realize it would be far more power hungry than the Arduino or other prototyping platform. I plan on using the Arduino because I've used it before and I really like it, but I was just curious if it was at all possible to use an old mobo/cpu to perform the same function? Is there some sort of PCI card or something that one could install?