electronic driver schematics

 Here are another three examples for electronic stepper motor driver.

These circuits are built  from standard components and can easily be adapted to be controlled by a computer.

      Two-Coil Excitation - Each successive pair of adjacent coils is energized in turn.

A variant of above circuit....

      Single-Coil Excitation - Each successive coil is energized in turn.

In this variant I used some ordinary components, available in large number in my "micro workshop" 

       Single-Coil Excitation - Each successive coil is energized in turn.

All variants was tested and I found only very small and insignificant differences in results. 

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