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 was found in a 1963 publication. Its purpose is to convert sinusoidal signals from...
This simple circuit of low power with an LM386 includes the highly sensitive audio preamplifier...
Another alternate action switch that uses a NAND Schmitt Gate [4093 IC] is shown here. The...