This midrange filter for sound systems was found in the May 1988 issue of Radio Electronics magazine. The circuit is based on a dual amplifier that must be powered by a symmetrical source.
We found this circuit that warns when the gate of a house is opened in an old documentation,...
With 3 transistors, we found this receiver in a documentation from 1966. The circuit has an output...
Generating a square signal (50% active cycle), this circuit was found in Siliconix documentation from...