ABSTRACT
This chapter discusses the circuits and programs relate to unipolar motors. In general, bipolar motors and circuits provide better performance and efficiency than the unipolar ones. Unipolar circuits are easier to design, code, and fabricate. For this reason, if the requirements of the application allow, a unipolar circuit may sometimes be preferable, despite its lower efficiency and performance. Unipolar motor control circuits require fewer components and are easier to design and manufacture than their bipolar counterparts. In the simplest possible implementation, a microcontroller can be used as a controller, usually combined with some simple devices that augment the current capacity to match the needs of the motor. Other more complex circuits use dedicated translators and drivers to relieve the microcontroller of some functions or to provide additional functionalities. Stepper motor is determined by two factors: the code sequence sent to the motor coils and the pulse rate.
