This tone control was obtained in the Audio Handbook of the National Semiconductor of 1977. The circuit controls the signals of medium frequencies in a wide dynamic range as shown in the diagram.
September 2016 - Mouser Electgronics already has in stock the new moisture digital sensor HDC1010...
This circuit was found in a Radio Electronics of August 1952. The transistors are germanium types...
We found this Nicad cell charging circuit in an English publication from the 1970s. The circuit can...