The Morse Machine - for Morse code demonstration, learning and practice

Morse code may be old fashioned, but it still fascinates people, old and young. This post describes a setup for Morse code practice and demonstration. The setup can be built easily and at very low cost using 3D printed parts and readily available components. The Morse Machine can be built with both straight key and paddles, for example as shown in the pictures here. The Morse Machine can obviously be used for keying a transmitter, but the intended purpose has been to demonstrate or teach Morse code, and not least to promote amateur radio.

Schematic, assembly instructions and OpenSCAD souce code are provided here for the electronics part of the Morse Machine and its cabinet. The instructions contain links to the firmware and to 3D printable morse key designs. The most updated version of this design resides on GitHub here: https://github.com/tskauli/MorseMachine.

The paddles can be found on Thingiverse here: https://www.thingiverse.com/thing:3168497.

The manual key can be found