Last week I had a big flood in my house. A water tube broke in the middle of the night making lots of damage. Wooden floor, furniture, small electronic appliances, all damaged due to the water. This made me think on a project that would sense water on the floor and trigger an alarm.
The detector should be able to sense water and trigger an alarm. Also it should be small and battery operated. Battery’s voltage should be checked also.
Flood Detector - [Link]