This circuit from General Electric was found in a 1967 documentation. The SCR is of the time, as are the transistors, but equivalents can be used.
We found this circuit in an English publication from 1995. The Hall sensor used is a component of the...
This digital buffer was found in the November 1993 issue of Electronics Now. The power supply...
This configuration with FET and Unijunction can be found elsewhere on this site. The JFET admits...