This is a diagram of a 1970s reel or tape recorder. It is an Italian Geloso recorder, quite popular at the time. The circuit is a reference for equipment recovery.
The advantage of this circuit lies in the fact that it does not need a negative source to generate...
This simple audio generator with the 741 was found in a 90sTexas Instruments. The circuit...
With this circuit from an old 1973 publication it is possible to use a small speaker as a...