I've made an iButton garagedoor opener and logger.
On a Dutch (kind of) eBay (www.marktplaats.nl) I found some iButtons and readers very cheap. I had no idea what to do with them, but I bought them anyway.
My garage opens with a push on a button, so it must be possible to get that working with the iButton.
I also found some really cheap (0,50 euro) displays, so it would be nice if I also can make a screen to show me who entered when.
The project is now existing in three parts: