This crowbar circuit for alternating current causes a quick fuse to blow when the load current exceeds a certain value. The circuit is from an American 80's documentation.
The circuit shown is from the 1994 Linear Applications Handbook by National Semiconductor. Some of...
This circuit with two transistors was found in Radio Electronics magazine from February 1968. The...
This interesting circuit from 1967 documentation uses three series lamps to regulate the voltage...