Hi all, We're working on a project which involves a cart rolling down a hill and then having a limited destance in which it must come to a standstill. After this point, it should accelerate in the opposite direction, back up the hill. The way I proposed doing this, after looking around the web, would be to construct a time delayed circuit where both the input and output is the motor, once working as a generator and once as a motor. In this case, I think the best approach would be to allow the capacitor to charge until the input voltage is below a certain threshold and afterwards discharge is (i.e. power the motor) until the charge is below a similar threshold. However, my electronics skills aren't that brilliant, so I was wondering if you guys could help me construct a schematic. Parts should be no problem, however simplicity is appreciated.