This 12V stepper motor controller was found in the August 1996 Electronics Now magazine. The circuit has a pulse input and the MOSFETs can be of virtually any type.
In the figure we have a bistable multivibrator using an operational one. The circuit is from old...
This is another of the Star Trek red alert circuit that you can find on this site. We took this...
This circuit for testing zener diodes by lifting their curve on an oscilloscope was presented in...