IC 4027 Low Cost Stepper Motor Circuit

I had immediately into my document. I do not know where it came from, but it seems that I photocopy a few years. I think it should be very helpful, so I decided it here. The circuit is very simple and inexpensive. It is a good thing, since most lines step motor controllers are very expensive. The circuit is made of standard components and can easily be adjusted by a computer. If you cheap surplus