This silencer or squelch preamp circuit was found in a documentation for radio amateurs. It completely mutes the circuit when there is no sound picked up by the microphone.
The 78xx series is manufactured by several semiconductor companies that present ideas for use in...
This alarm siren was found in volume 5 of the 1995 Encyclopedia of Electronic Circuits. The...
This circuit can be implemented with other comparators in the same series. The circuit is from a...