This is when you pull out your traditional Morse code keyer and have a chat with ... [Mike Herr] found a grey area by mechanically interfacing an Arduino with a straight key.

[Dan] decided to take a shortcut and use some modern ... rest easy while the Arduino does all of the hard work. If you’re wondering why anyone would want to learn Morse code these days, it ...

you can make the LEDs blink Morse Code. Now that you've seen how to blink your Arduino's LED, we'll use one final, slightly more complex example: we'll use a third-party UNO breakout board and an ...