Patent ID: 8554379

Claim:
An irrigation controller for operating a plurality of electrically activatable irrigation valve stations each having first and second electrical pole connectors, the controller comprising: a first set of a plurality of selectively energizeable electrical ports; a second set of a plurality of selectively energizeable electrical ports, each of the second set of ports configured to form an electrical circuit when connected with a port of the first set of ports; an electrical logic circuit configured to selectively energize or deenergize the ports of the first and second set to selectively activate or deactivate a single selected valve station of all electrically connected valve stations, when a) the valve stations are electrically arranged in a plurality of groups, each group containing a plurality of valve stations, b) the first pole of all valve stations in a group is electrically connected by a wire to a single one of the ports of the first set of ports, each group connected to a unique port of the first set of ports, and c) the second pole of each valve station in a group is electrically connected by a wire to a unique port of the second set of ports, e) one of the ports of the first set, and one of the ports of the second set, are energized or deenergized to activate or deactivate a selected valve station to thereby starts flow of water or stop of water a flow of water from at least one of the plurality of electrically activatable irrigation valve stations.