Atomic clocks are timekeeping devices that use the vibrations of atoms (commonly cesium, rubidium, or hydrogen) as their ...

Rubidium atoms can exist in three states ... where he actually converts the GPS-discipline oscillator to use the new atomic clock. We’ve seen this done before, of course. Cesium is even more ...

[Art] certainly lives up to his username. His Rubidium-standard atomic real-time clock is surely an example of hardware art. The substrate is a collection of point-to-point soldered perfboard modules.