This circuit acts on a relay disconnecting the load when the input voltage exceeds the set limit. The transformer is 12 V secondary according to the relay used.
This circuit was found in the March 1990 issue of Radio Electronics magazine. The circuit can be...
Found in a 1980s English magazine, this trigger circuit can have different types of inputs...
We find this circuit in an American manual from the 80's. The circuit can be implemented with more...