The model of a good HN post. Not only does it do something interesting to geeks, but, unlike "Star Wars On A Floppy Drive", actually takes the time to explain how it worked. Less cat - photos - in - geek-post - clothing. More like this.

Also, coolest thing I've seen done yet with a Salae probe. Those things are cheap, tiny, cool looking, and make great gifts; we've given them to job candidates before when things didn't work out.