This circuit was found in American documentation from 1966, but it can be assembled with a modern equivalent transistor. The circuit is based on a mechanical tuning fork with a coil feedback system.
This circuit was found in a 1967 Philips publication. Transistors support equivalents and modern...
We found this circuit in the April 1993 Electronics Now magazine. Almost any general-purpose JFET...
In the figure we have the way to make the three-phase control of a motor using opto-diacs. The circuit is...