The technology is old and Morse Code complicated, but Ham radio operators remain relevant even today.

However, it is also true that Morse code transmitters and receivers are dead simple to build and can get through where other simple radios can’t.

The first message sent by Morse code’s dots and dashes across a long distance traveled from Washington, D.C., to Baltimore on Friday, May 24, 1844 – 175 years ago. It signaled the first time in human ...

The first message sent by Morse code’s dots and dashes across a long distance traveled from Washington, D.C., to Baltimore on Friday, May 24, 1844 — 175 years ago. It signaled the first time ...

Initially we build a transmitter and receiver to communicate between Arduinos using Morse code sent by pulses of light waves. Next, we consider digital music, which we create by switching a voltage on ...