Found in a 1967 RCA power manual, this circuit uses an ordinary neon lamp to fire a triac. The circuit is for the 110V network.
We obtained this circuit in a 1987 publication. It is the traditional French siren configuration with two...
We found this circuit in April 1979 Radio Electronics magazine. The circuit is based on the 555...
This simple circuit helps to save incandescent lamps by leaving their filament slightly heated and thus...