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.
August 2017 - Mouser Electronics announced the availability of a full range of Mean Well regulated DC-DC...
Found in an English documentation from 1977, this circuit activates a relay according to the...
This circuit appears in other articles in this section, but it is very interesting. It is a...