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As a kid, I had a ham radio receiver and I would stay up late listening to the bbc and the robotic-sounding noises of morse-code communication. This rig would have been fun to run between my room and my brother’s room for secret communication. Got a morse code project idea? Leave a note in the comments!

As you can see, this was a carefully thought-out and executed project. Many people just want to build a very simple set to become familiar with the basic principles of the electric telegraph. The following project is the simplest functional telegraph system construction project that I could find. It requires very few parts and all of them should be commonly available. Link