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Circuit Help Answered

hi, i saw a video by the king of Random    

He hand cranks up a drill to charge a phone..
but what i wanna do is similar but different, instead of charging a phone i want to charge a battery and what i need to know is,
what component do i need to stop the current from the battery to go back into the drill once i stop cranking so it doesn't depletes..


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7 years ago

You need a diode between the battery and the motor. Diode only allow current to flow in one direction. So the motor will be able to feed the battery but the battery won't run the motor.