 | This article needs additional citations for verification. (September 2024) |
A keyer is an electronic device used for signaling by hand, by way of pressing one or more switches.[1] The technical term keyer has two very similar meanings, which are nonetheless distinct: One for telegraphy and the other for accessory devices built for computer-human communication:
- For radio-telegraphy, the term "keyer" specifically refers to a device which converts signals from an "iambic" type or "sideswiper" type telegraph key into Morse code for transmission, but excludes the key itself.
- For computer human interface devices, "keyer" generally refers to both a single-hand multi-switch and the electronics which interpret the user key-presses and send the corresponding signals to the computer.