Pictured above is the sensor portion of what [Frapedia] calls his visual rain sensor. Most rain gauges just use a graduated cylinder to capture water as it falls from the sky. That will give you a ...

The rain stirs emotions, evokes nostalgia, and can even bring a sense of renewal. Whether you find comfort in the patter of ...

Some Tesla vehicles can use their cameras to passively detect rain. Also, if you don’t need to sense the glass, it is pretty easy to measure the effect getting wet has on a PCB resistor.