Wrinkling the forehead is an often neglected method of producing Morse code signals. I therefore designed a CW key which is operated by forehead muscles (that means, by raising the eyebrows).
I am not going to use an ordinary HF transmitter to send code with, but instead this LED headlight as a signal lamp.
The lamp insides before modifications.
An external forehead switch is added to control the LEDs.
The switch and lamp seen from another angle.
The switch position is adjusted so that it touches the forehead wrinkles properly.
This video casts light on how the key is operated: