This is my first step to robotics. In this project all i did was use an arduino with L293D to control the motor speed without a potentiometer. this was actually an assignment / a small test given to me by CtC (chris the carpenter). the motor is suppose to speed up and down with a delay.
"stop - ramp up - hold - ramp down - stop"https://www.youtube.com/watch?v=RlVS7myBzns