– — .-. … .
We look at two ways to generate Morse code, then use the code to open and close a telegraph sounder.
Generating random and pre-recorded Morse code
Lead Image © Jana Guothova, 123RF.com
My first exposure to Morse code [1] was 15 years ago at an amusement park. I stumbled into a small exhibit, complete with a ticket agent mannequin that, despite his rather stiff appearance, was managing to send Morse code on an authentic telegraph key and sounder. That exhibit always stuck in the back of my mind, and in the years since, I've had the opportunity to recreate it a few times.
Beginnings
My original build was for the Interurban Museum in Plano, Texas, where I was a volunteer. Although the Texas Electric Railway never used telegraph equipment for communication, the museum had a small display about it. I thought it'd be great for someone to be able to "talk back" to the telegraph exhibit, so I started figuring out how to do that, with little more than a desired outcome and no idea of the path to take.
The development platform available to me at the time was an Atari 800XL [2], so using my newly learned skills in BASIC, I wrote a program to translate characters to their equivalent dots and dashes.
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