[Stephen Hobley] has been experimenting with an electromagnetic pendulum in order to build himself a clock. Through the course of his experiments, he has learned quite a bit about how pendulums ...

Previously, [Vinnie] had been stopping the clock every evening, and hoped he would remember to start the pendulum in motion 12 hours later. This was a chore, so he decided to automate the process.

Enhancing the display's mesmerizing allure is a brass Foucault pendulum hanging five stories — about 70 feet — down from the center of the clock, which swings based on Earth's rotation.