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.
This power supply was found in the September 1989 issue of Radio Electronics magazine. The 2N3055...
I found this simple circuit from an English magazine from 1984. The circuit can be easily...
This voltage regulator for automotive use was found in a Radio Electronics from the 80s. The Q3...