This is kind of a mashup of different projects: an arduino to control a servo that controls a homemade Morse code key that controls a simple 4 to 7 component cw transmitter. I will just show some pictures of the various parts and a few comments about each. Please note that operating a cw transmitter generally requires a ham radio license unless you terminate the transmitter with a dummy load resistor to keep from propagating a signal outside of your house. A license is a pretty easy prospect these days since proficiency with Morse code is no longer required.
Why do this project?
1. It is entertaining to watch the arduino control the key with a servo.
2. It is a good practice oscillator for listening to Morse code.
3. It can operate your key and transmitter while you go outside the house and check reception.
Have fun – de ke8bsh