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 car anti-theft circuit is from a Radio Electronics magazine from May 1986. The circuit...
This circuit, well known, since it is already present in other points of this website, is from an...
We found this source with the CI 723, common at the time, in a 1989 paper. Power transistors must be...