miniTelegraph

The original idea, and the code of Arduino belongs https://github.com/YegorAlexandrow/ (с)YegorAlexandrow Description in Russian - https://geektimes.ru/post/293525/

Development of the case and mechanics for the 3D-print Savva Osipov. Ilya Osipov and Igor Timofeev helped https://youtu.be/R8sVSa7UY7E

Publications:

https://medium.com/@cubios_inc/this-arduino-powered-telegraph-project-will-teleport-you-160-years-into-the-past-e9e49418ce90

https://www.hackster.io/savva-osipov/arduino-powered-telegraph-bb8777

https://create.arduino.cc/projecthub/savva-osipov/arduino-powered-telegraph-bb8777

https://www.facebook.com/official.arduino/posts/2215758461783794