This latched alarm uses a double relay for this purpose and can control higher power external loads like a siren. The circuit is from 1974 documentation and has a very low consumption.
This self-oscillating voltage conversion circuit was found in an American 1980s documentation. The MOSFET...
This high-performance circuit was found in the 1982 SGS Linear Integrated Circuits Manual. The...
This is a very simple configuration with a power transistor to control a DC motor from 3 to 12 V...