You can send a tweet from your laptop, you can do it from your tablet and you can do it from your phone. You can use the website, TweetDeck, mobile apps and countless other clients.
They all try to make it as easy as possible to tweet something. But this project doesn't. It does make it a lot more fun, or at least stylish.
Tworse Key enables users to tweet via Morse code. All it needs is to be plugged into an Ethernet port. From there, it's all up to you, start typing away and, depending on your Morse code proficiency, you may be done in a few minutes.
The device is completely stand-alone, it's based on an Arduino chip, of course, and the schematics for the whole thing are available
online, if you fancy one for yourself.