Found in a 90s Electronic Engineering, this circuit generates sinusoidal signals that depend on the capacitors. The potentiometer adjusts the generated signal symmetry.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...