This circuit can work with almost any JFET. The circuit is from an Electronics Now from April 1993. It is powered by a 12 V battery, but can also be powered by 9 V.
This circuit is from a 1977 publication for radio amateurs presenting a crowbar protection. The...
This is one of many versions of this circuit that the reader can find in this section. The circuit...
This circuit is suitable for testing motor starting capacitors. Capacitors from 2 to 8 uF are...