Automatic Windscreen Wipers.

[Bramleyboy]

How do automatic windscreen wipers work? Once you've switched them on they run depending on the amount of rain. How do they detect the rain because I think the sensor is stuck to the glass behind the central mirror. Bramley

[Buenchico]

Infra-red light:
http://auto.howstuffworks.com/wiper4.htm

[gsr600]

http://auto.howstuffworks.com/wiper.htm

[gsr600]

http://www.volkswagen.co.uk/technology/comfort-and-convenience/auto-rain-sensors


forget my first link