Found in a 1960 General Electric documentation, this crowbar circuit blows the fuse in case of excess current. The circuit is for 12 V sources triggering between 14 and 17 V.
The circuit in the figure indicates when the input voltage exceeds a certain value adjusted by the...
We found this circuit in Radio Electronics magazine from May 1962. The circuit uses rectifier...
This circuit, from a 1974 publication, can be assembled with BC548 transistors. If powered with 6 or...