This circuit was found in the November 1992 issue of Radio Electronics magazine. The circuit has an amplification stage for the relay. The relay is rated at 12 V.
The frequency of this oscillator depends on the crystal used. The transistors are general purpose. We...
This circuit was suggested in an article in Radio Electronics magazine in January 1992. Other...
The coil of this receiver consists of 100 turns of wire 38 to 30 in a ferrite rod and the...