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.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
Crystals from 100 kHz to 1 MHz can be used in this 1957 Raytheon circuit. 4 can have values...
This window comparator configuration is from a 1980 publication. It is a conventional circuit that...