The circuit is from a Radio Electronics magazine from October 1987. The Triac must be equipped with a heatsink and the transistors are general purpose.
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...