This trigger uses two switching transistors that can still be found with some ease. The circuit is from an old documentation and its purpose is to speed up the switching of logic circuits.
This telegraphy circuit generates an audio tone from a pure RF carrier. We found it in a...
Found in Popular Electronics from the 90's, this circuit uses 555 integrated and common...
This circuit was obtained in a 1982 English magazine. It is a regulator for outputs between 1 and...