The two circuits shown show how to obtain an SSB / CW control for receiving this signal top at a common receiver. The circuits were found in an old American manual from the 80's.
We found this circuit in a 1987 publication. Through a relay, it controls water valve solenoids at several...
The TDA2040 is not a common IC these days, but if you find one you can build this high quality...
This circuit causes an LED to flash on a robot when someone speaks near him, showing that he is...