Self-biasing JFET circuit (CB25563E)

This JFET amplification stage was found in the April 1993 issue of Electronics Now. The input impedance is 10 Megohms.

Two Transistor Metronome (CB13959E)
The circuit is from an English publication from 1970, but it can be assembled with more modern...
Multivibrator (CB23591E)
This astable circuit has a different configuration. We found it in a Radio Electronics from...
SCR Mobile Alarm (CB19975E)
This circuit was found in a 1975 documentation. The SCR can be of any type and in this case, we...