Simple stepper motor controller

The main feature of the circuit is that it is very easy to construct. In addition, it has a very low price and is based on easily obtainable compontents. Suitable motors can be salvaged, for example, from old 5.25" floppy disk drives. The other components in my Project may be found in just about any junk box. By Contrast, special controller chips are often not so easy to obtain or are pretty costly.