hi there im working on a project for science olympiad and i recently got all the electronics done for my robot. what baffles me though is that after about 3 to 4 minutes of controlling the motor (through an h-bridge) and servo all of a sudden both stop working, the motor stops working and the servo makes very jerky movements in one direction. is there anything u can think of that could cause this? i have checked all of my connections which are good, the batteries are still fresh, and i have even swapped out the micro (16f690) all have made no difference.