The water trickled, and the lights blinked on. In a new study, researchers in Singapore describe a way to turn falling water into electricity using nothing more than droplets, a narrow plastic tube, ...

Water droplets falling through a tube have generated enough electricity to power 12 LED lights. Such an approach could one day be used in roof-based systems to harvest lots of clean power from rain.

When two materials come into contact, charged entities on their surfaces get a little nudge. This is how rubbing a balloon on the skin creates static electricity. Likewise, water flowing over some ...