This simple circuit for motors that depends on the MOSFET used was found in the January 1998 Electronics Now magazine. The motor voltage does not need to be the same as the oscillator.
This circuit was originally designed to power the CB18698's MSX interface, but it is suitable for...
This filter that rejects determines frequency (notch) was found in a Popular Electronics of 1993....
This circuit for measuring bridges was found in the October 1995 issue of Electronics Now...