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.
Found in General Electric documentation from the 1980s, this circuit generates signals that depend...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
We found this circuit in an American documentation from the 90s. The circuit applies to vehicles...