Abstract
For stepper motor control a cost-effective microcontroller-based circuit is presented that uses most recent commercially available integrated circuit chips capable of supplying up to 2.5 A at 48 V. With a properly selected microcontroller it is shown that simultaneous complete individual control of several motors including the selection of eight different current levels can be performed. This can be accomplished by entering some high-level simple commands through the terminal of a personal computer to which the controller is interfaced via MC1488 and MC1489. Modular design of hardware and software is proposed for easy expansion and modification to suit a desired application. The circuit is capable of handling complex systems where the control of several stepper motors is required. This is accomplished through the use of the multiprocessing communication capability of the employed microcontroller.
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