WASSERFLUSSREGELEINRICHTUNG

摘要

A watering valve device includes a first electromagnetic coil for opening a valve to enable a sprinkling system and a second electromagnetic coil for closing the valve. An electronic circuit is provided for supplying current pulses for selectively energizing the two coils to control sprinkling in response to ground moisture and/or sunlight. The circuit includes a first timer for maintaining the sprinkling valve on for a predetermined timer period after sunlight occurs to assure penetration of the ground by moisture during night-time watering. The circuit includes a second timer for maintaining the valve on for a second predetermined time period following moisture detection by a ground probe to assure ground penetration by moisture during a moisture responsive, closed loop mode of control. The circuit and valve are operated by batteries that are charged by sunlight.