We found this circuit in a William Sheets. The circuit is for frequencies up to about 500 kHz.
The battery is charged by the photocell that keeps the low consumption beacon in the dark. The...
The circuit transistors, found in a 1974 documentation, may be the BC548. The circuit is used in...
We found this circuit in the April 1993 Electronics Now magazine. Almost any general-purpose JFET...