Tilda Nature Triggered

Post date: Oct 10, 2016 1:48:19 AM

A sensor sensed wind by putting a light sensor inside a closed box with a fabric curtain as the window to sense wind and a LED on top to tell the wind. When the wind comes and blows the curtain up, light comes into the box and the LED is lighten up. The bigger the wind, the more the curtain is lifted up and the lighter the LED is.