The sword in the Hobbit glows when there are orcs around – great technology, but not hugely useful in the real world. If only it could detect wifi instead… So that’s exactly what this guy has built.
The sword has been modified so that it will glow when there are unsecured wifi networks present – and it will even try and connect to them, flashing to indicate that it is connecting. Check out the video.
You can find full instructions on how to make your own here.
I’m still waiting for a ring that will turn me invisible.