Rain may soon be an effective source of renewable energy | Engadget

Researchers have developed a generator that uses a field-effect transistor-style structure to instantly produce a surprisingly high voltage from water drops — a single drop can muster 140V, or enough power to briefly light up 100 small LED bulbs. Earlier generators without the structure produced “thousands” of times less instant power density, the scientists said.
— Read on www.engadget.com/2020/02/09/raindrop-electricity-generator/