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.
The circuit shown in the figure on the right can be used on a data transfer bus with the use of an...
This circuit is suggested by an English publication from 1980. It is an RF detector that uses a...
This very low voltage circuit with the LMV321 was obtained from its own datasheet. The circuit can be...