If you are a ham radio operator of a certain age, you probably remember ads for “The Instructograph,” a mechanical device for learning Morse code. [Our Own Devices] has an ancient speci… ...

Carter Martone, right, shows his father, Chris, the Morse code transmitter he created during Camp Invention on Friday at Mastricola Elementary School in Merrimack.

Looking to Ditch Twitter? Morse Code Is Back Reviving a 200-year-old system, enthusiasts are putting the digit back in digital communication ...