[Eric] wanted to teach his kids Morse code, so he built a tiny Morse code trainer. [Eric] built the trainer around an ATtiny85, and the rest of the circuit follows this minimalist idea. After conne… ...

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!

The code was developed in the 1800s by Samuel Morse and other inventors, using electrical signals sent through wires between telegraph stations.