Help with project design please
I am building what amounts to a miniature winch. I have a small, but powerful, battery powered gear-motor, which can wind thread or wire onto a spool. My problem is the motor shaft does not turn freely because of the gears so I need to find a way to allow the wire to spool freely out before it is then wound back under power. One-way bearings do not work because they are designed to allow a shaft to rotate freely in the same direction it turns as it does when under power, like a helicopter rotor. I need the shaft to turn under power in one direction but to spool out freely in the opposite direction. Suggestions?