Devon Elliot has a great blog post that describes how he re-purposed a vintage telegraph sounder to sound out tweets and SMS messages with an Arduino & Adafruit FONA. Telegraph sounders were used in the early days of wired communication to sound out the dits and dahs of morse code and they worked with an electromagnet much like a mechanical relay. Devon describes how he wired up a telegraph sounder to an Arduino and then connected an Adafruit FONA to allow SMS messages to be sounded out as morse code. Fantastic work!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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