This circuit is from a 1924 book by Gernsback. The receiver uses two tubes and listens to headphones. Power is supplied by battery with the indicated voltages.
This NOR or NO-OR function circuit can be implemented with two or more general purpose...
We found this circuit in a 90's Radio Electronics. The low power circuit activates a 12 V relay...
This static switch circuit appears elsewhere on this site from other sources. This was obtained from a...