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.
This circuit is from a 1991 PE Hobbyst Handbook. The circuit uses two trigger transformers for a xenon...
A JFET is used in this circuit to maintain constant gain. The circuit is from an Electronics Now...
Found in a Popular Electronics from the 90s, this circuit uses a double 555 to emit beeps when the...