Past Student Work Patty Stalonczyk – Creative Switch Posted by Sabrina on February 12, 2013 When water hits the saucer under a plant pot, it is time to stop watering. This LED switch is turned on by detecting water in the saucer. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window) Related