This circuit triggers an alarm in the event of a power failure. The circuit is from an 80's documentation, being powered by 9 V battery. The parts are common today.
This is one of the many modulated siren versions that can be found on our website. We found it in a...
This circuit was found in the May 1983 issue of Radio Electronics magazine. The SSM7046 integrated...
This isolated shield uses a common optical coupler that supports several equivalents. The resistor in...