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 is a conventional triac dimmer configuration found in a 1986 documentation. The triac used is a...
This circuit is ideal for a power supply that enables the use of automotive power appliances on a...
This circuit is from a 1957 Raytheon transistor manual. The diode can be of general-purpose...