This circuit was developed to find intermittent defects in an electrical control. In the event of a defect, the circuit fires indicating the moment of occurrence.
We found this sensitive moisture detector in an old documentation. The circuit uses a common JFET,...
This simple 2-transistor radio is from Radio Electronics in October 1952. The circuit outputs a...
This circuit was obtained in an American documentation of 1964. The transistors are of the time....