27 thoughts on “ Arduino Drives Seventeen Stepper Motors, Carefully ” ... Because you can’t drive a unipolar motor directly with the Arduino. ... DC current into any IO pin” of 40mA.

A couple of plastic bottles lashed together make up the hull of the boat, and [Antonio] has used the internal frame of an old optical drive bent at a 90 degree angle to hold the two small DC motors.

Along with an overview of the kinematics and mechanics of drive systems, the book describes system components including dc and brushless dc motors, gearheads, encoders and controllers. “The handbook ...