Pictured above is the sensor portion of what [Frapedia] calls his visual rain sensor ... visualized by a VU-meter chip on a column of LEDs mounted inside the house. After the break you can ...

Like many who came before, [Magnus] had experimented with traditional resistive-based sensors using copper traces to measure water levels. As the soil moisture measuring set learned as well ...

Cars are packed to the gunwales these days with sensors, hand-holding driver ... figured out how to use windshield-mounted conductive assemblies to sense rain. Japan's Denso was also tinkering ...