you probably remember ads for “The Instructograph,” a mechanical device for learning Morse code. [Our Own Devices] has an ancient specimen of the machine and shows us how it works in the video ...

[Rostislav Persion] wrote a simple Morse Code decoder to run on his Arduino ... A Morse decoder built today is more likely to be used to decode machine-generated signals, for example, debugging ...

Sending Morse code from a mountaintop—altitude offers ham radios greater range—“is like being a clandestine spy and having your own secret language.” Worldwide, Galchutt is one of fewer ...