In the figure we have the way to implement a logic gate or (OR) with an LM393. The circuit must be powered by a symmetrical source and other operational ones can be used.
This circuit was found in a 303 Circuits issue of Elektor magazine from the 1990s. The circuit uses...
With the name of transitube we find this MW receiver in documentation from the 50's. It uses a...
The 1: 1 transformer on this circuit found in a 1967 Electronics World can be wrapped around a...