Another reason is that Morse code can often get through ... [M0TGN] wanted a device to generate practice code, so he built it around an Arduino. The device acts like an old commercial model ...

For many years, simple code keys and practice oscillators were the ... (HID), emulating the keyboard of his computer. An Arduino converts Morse code characters tapped at the key into keystrokes ...

What’s more, the Arduino-powered device ... a user to connect a keyboard or dedicated Morse code paddle so they can tap their own messages or practice learning the various patterns.