This circuit was found in a 1970 American publication. The FETs are power types according to the desired output current. The operational can be replaced for modern equivalents.
This circuit was found in the December 1976 issue of Radio Electronics magazine. The circuit...
This circuit maintains on a flashing LED at a frequency determined by the capacitor. The...
We found this configuration in a Radio Electronics from 1989. The circuit can be designed with...