This circuit was found in an Experimenters Handbook of the 1990s. The purpose of this circuit is to keep constant the audio signal level of a system, increasing the lower signals.
This circuit was obtained in a Popular Electronics of the 90s. It against a kitchen hood based on...
Found in the August 1993 Electronics Now magazine, this circuit employs two symmetrical source 741...
The 50 kHz signal generated by this circuit is applied to a low impedance inductive transducer. A...