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 is from a 1992 publication, but can be mounted very easily today. The circuit is...
This circuit was obtained in documentation on medical applications from 1966. The circuit is used in...
If the reader still uses silk screen printing tables this is an interesting circuit found in a 1994...