Personal atomic clock (chip-scale)

But that's for NIST F1. For $1,500 today, you can buy your own atomic clock, which is less than the size of a grain of rice. It was developed at NIST. [Tom shows a slide.] Here's the little printed circuit board with the lights going on it, and for $1,500 you can buy one of these things, your own little time standard. This is what it looks like split up. There's a little heater where you heat up the cesium, and this is a boron nitride container, and there's a little laser down here that shines up through here and measures the frequency of the vibrating atom. This is only good to one part in 10 to the 10th, which is one second in three hundred years. So if you want to be on time you can have your own little personal atomic clock. It only takes 75 milliwatts. Pretty neat, huh?