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.
The gain of this alternating voltage amplifier is 100 times, depending on the 1M-ohm resistor, which...
This is the conventional protection system for a low resistance analog instrument (millameter or...
This circuit was obtained from a 90s Elektor Electronics f. The output current of each sector is 1...