Abstract
Stepper motors work stably, are not affected by external factors, and errors do not accumulate. These advantages make them mostly used for open-loop control, so the control system is simple and is widely used in machinery, instrumentation, and automation fields. In this paper, three kinds of stepper motor driving circuits are designed based on the use of specific chip driving methods, using L297, L298 and ULN2003A driver chips, and AT89C51 microcontroller, respectively, and each circuit is introduced in detail in this paper. Each of these three circuits has different functions and requires different operation methods to achieve control of the stepper motor. By comparing the functions, application scope, and operation methods of the three circuits, it is concluded that the third driver circuit, which is composed of AT89C51 and ULN2003A, is widely used and convenient to use.
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