A system for deterring animals and humans from entering protected sprinkler zones. Motion sensors are placed in an area to be protected. Upon detection of a trespasser (e.g., animals or humans) within the protected area, the sensors produce a signal for activating sprinklers in the zone and/or other appropriate zones. The sensor output can be electrically connected to a step down transformer, which is connected to an appropriate sprinkler valve or to the sprinkler valve output at, for example, the sprinkler control box. The sprinkler valve can be activated and an appropriate sprinkler zone turned on to spray the trespasser with water. New or existing sprinkler systems can be utilized for varmint and/or intruder deterrent without utilizing complex electronics.
