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An Arduino converts Morse code characters tapped at the key into keystrokes over USB. As [voxnulla] knows, when butterflies aren’t available, real programmers drive vim with a Morse key!

Morse code, the language of the telegraph, is a system of communication that's composed of combinations of short and long tones that represent the letters of the alphabet.

Morse code is independent of pitch or spatial information of any sort—in Morse code timing is everything. There are two fundamental elements of Morse code: dots and dashes.

How Does Morse Code Work? Samuel Morse is to the telegraph what Thomas Edison is to the light bulb—he didn’t necessarily invent the technology, but he did perfect it.