What's even better: they're based on the Arduino, one of my favourite toys.
My favourite is this one: http://www.instructables.com/id/Arduino-Binary-Alarm-Clock/. It inspired me a lot and yes I took the code as a base for my project. But this one is far too big for me. I wanted something I can take with me when I visit Hacking Conventions and don't want to miss the early lectures. Nothing is more annoying, if you finally got some tickets for the con, go there and don't wake up after a long (really long.....) hacking and builing night and miss a workshop you'd really want to join.
So what's small enough to fit in a pocket and is also a really great case for projects like this? Yes, an ALTOIDS tin :)
Actually this instructable isn't complete at the moment. First I thought, I'd just share some pictures, but some friends asked for an instructable, so I'll add a detailed how-to the next days.
The pictures on this side are from the first version. You will find newer (but not really better pictures, because my camera died and so I shot a lot of pictures with a crappy web cam or used some for the parts I found on Google) pictures in the following steps.
As said, the pictures are sometimes blurry and crappy. That's why I've entered this to the pocket-sized contest. I really need a new camera.... ;) Please vote 4 me :)