Found in an American circuit manual from the 1970s, this circuit can use any general-purpose transistor. The operating frequency range is from 600 to 4000 Hz.
We found this circuit in an English publication from 1963. The circuit uses germanium transistors of the...
This circuit is used to cut the “click” in the loudspeaker of amplifiers when they are turned on....
This simple rhythmic light circuit uses a 110 V to 220 V transformer and can hold a good number of...