How to control how the DC motor turns? We want the motor to turn a specific amount of time or degrees?
So can we get the motor to stop and start.
More details required
Which Arduino board ?
How is the project powered ?
What electric motor ?
What will stop and start the motor ?
What programming experience do you have ?
Do you have any knowledge of electronic circuits ?
"How to control how the DC motor turns? We want the motor to turn a specific amount of time or degrees?
So can we get the motor to stop and start."
To get a motor to rotate a certain number of degrees, you will need rotation/rotation information feed back from the motor. Motors are usually controlled by some type of H-bridge. You might check how close a continuous rotation servo comes to your needs.