This project combines a sand timer with a rotating mechanism and an optical beam through the center of the timer to observe the falling sand as they create a USB Hourglass. This project combines a ...

The steady methodical flow of sand through an hourglass as it succumbs to the pull of gravity is a great way to kill time—but not a very productive one. This clever alternative hopes to change that, ...

The title sequence shows an hourglass with sand trickling to the bottom before a backdrop of partly cloudy sky: “Like sands through the hourglass, so are the days of our lives.” Although I can’t say I ...

Why does an hourglass use sand instead of water? The Granular Flow Laboratory Project explores this concept by designing a transportable display demonstrating granular vs. fluid flow. Three ...