Nice. Reminds me of a "Using a Raspberry Pi to send and receive Morse Code with a laser" post from a while ago [1]. [1] https://partofthething.com/thoughts/sen

Nice. Reminds me of a "Using a Raspberry Pi to send and receive Morse Code with a laser" post from a while ago [1]. [1] https://partofthething.com/thoughts/sending-and-receiving-morse-code-with-a-laser-and-a-raspberry-pi/ https://partofthething.com/thoughts/sending-and-receiving-mo... Knowing a little Morse code, the scene in Stranger Things where they set up a whole wall of letters was mildly infuriating. I guess if no parties knew the code that's what you'd have to do. But what a great reason to learn! Ham radio operators still use it (they call it CW for continuous wave) mostly because it is really easy to hear over super long distances (inter-continental) with small radio equipment (often just a few Watts) through all the noise.