This circuit can be used with 3 receivers and is intended for low frequencies (medium wave range). We found it in the September 1995 Electronics Now magazine.
This simple circuit was found in the Spanish magazine “Todo Electronica”, in an edition of 1996....
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This 1967 Raytheon circuit uses a Raystor, an optical coupler with a lamp and an LDR. The circuit...