In the 1930s classic movie “The Wizard of Oz,” The Wicked Witch of the West uses a sand-filled hourglass to gleefully remind our hero Dorothy that she only has so much time to live while the sand is ...

An hourglass tells you what it is in the name — a glass that you use to measure an hour of time passing by. [EDISON SCIENCE CORNER] has built a digital project that mimics such a thing, with little ...

An hourglass tells you what it is in the name — a glass that you use to measure an hour of time passing by. [EDISON SCIENCE ...

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 ...

So you need your project to pause for a preset number of minutes but you can’t do it programatically? Why not connect a micro-controller to an hourglass egg timer to sense when the sand stops moving ...