Straight(ener) key

by OH6DC

A hair straightener can turn frizzy hair into a sleek and smooth style in minutes.
Or alternatively, you can turn a hair straightener into a telegraph key.

The device dissassembled.

Wires were connected directly to heating plates.

Mains plug was replaced with a 6.3 mm keying plug, and paint was scraped away on the plate ends.

This is how it works: