Ahead of what's expected to be drenching rains from Tropical Storm Elsa, Georgia Tech Senior Research Scientist Russell Clark got up at dawn Wednesday and installed a rain gauge on his dock in ...

The experiment is for switching an acoustic sounder as a rain alarm after a predetermine time. It may, however, be tinkered for a number of other applications. Needless to say, this is a simple ...

Sometimes we need a non-contact liquid level sensor. There are several ways to build that, but the easiest is to try an optical liquid level sensor. You may already have an idea in mind since you are ...