This simple circuit, found in American documentation, uses only one relay that locks when any of the sensors is activated. To reset, simply turn off the power for a moment.
This circuit aims to recover batteries that are no longer fully charged due to the memory effect. We...
We found this circuit in the April 1993 Electronics Now magazine. Almost any general-purpose JFET...
We found this circuit in the July 1992 issue of Radio Electronics magazine. An optical system...