This crowbar protection circuit for non-regulators blows the fuse when the load voltage exceeds a certain value. The configuration with component values can be seen in the previous circuit.
When light fails to focus on the sensor, a common photo-transistor, the relay closes its contacts....
The component used in this regulator is not common today. The switching circuit is from an 80's...
The basis of this circuit is the 723 integrated circuit, not very common today. We obtained this...