Today when we send information -- speech, words, numbers, or pictures -- to someone far away we can use the radio, telephone, television, fax machine, or a computer network. However, the need for ...

Morse Code Day is April 27, 2018. Learn how the electric telegraph revolutionized how quickly messages could be received. Katya Vines, PhD You have big news that you want to share with family in ...

Late in the nineteenth century, Guglielmo Marconi began experimenting with electromagnetic waves to send signals. At that time, the telegraph wire was the quickest way to get messages from here to ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Telegraph keys are electrical on-off ...

This series of projects explore concepts of radio communications. We use LEDs to generate (very high frequency) radio waves and photo-resistors to take the place of radio antennas. These ideas are ...

A PAPER on high-speed recording of radio-telegraph signals was read recently in London before the Institution of Electrical Engineers by Messrs. R. B. Armstrong and J. A. Smale, in which the authors ...