A long time ago, I wrote some code to send simple morse messages by toggling a pin of an Arduino. It could either blink an LED, or if you wired a bias resistor and transistor to it, you could use it to (say) act like a key for the FT-817. But then I lost the code (it’s probably on my old laptop somewhere).

So, I rewrote it. This time I included some additional code so that it could generate a PWM signal that would beep a small speaker or buzzer. Some people seemed to like the code and thanked me for writing it. No biggie. I got some requests to reuse the code, I placed no restrictions on its reuse, but said that it would be great if they mentioned my name and blog when they redistributed it.

Erik Linder, SM0RVV, did just that. He tidied up the code, and submitted it to the Arduino Playground. Awesome! Thanks Erik. Hope others find this little code fragment to be of some use.

Arduino playground – Morse.