BIPOLAR STEPPER MOTOR CONTROL CIRCUIT. In this circuit, a potentiometer controls both the speed and direction of a small bipolar stepping motor like those found in many 5 1/4 floppy disk drives. Note that the bipolar motors are distinguished from unipolar types, in that bipolar units have two coils instead of four, and four wires instead of five.

For view click BIPOLAR STEPPER MOTOR CONTROL CIRCUIT. In this circuit, a potentiometer controls both the speed and direction of a small bipolar stepping motor like those found in many 5 1/4 floppy disk drives. Note that the bipolar motors are distinguished from unipolar types, in that bipolar units have two coils instead of four, and four wires instead of five. schematic diagram