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.
July 2017 - The new touch switches from Alps SKPS series for surface mounting can now be purchased from...
Found in an 1989 R-E Experimenters Handbook, this circuit produces several sound effects that can...
June 2017 - Mouser Electronics has a broad line of Cree products for use in horticulture, such as...