Electronic valve control apparatus

In a valve control system including at least one valve device connected to a supply source of fluid under pressure and a control apparatus to operate the valve device, an improved control apparatus comprising:

• an electronic clock which delivers output time pulse signals indicating the passage of time to a logic circuit and delivers output signals of valve operation time schedules preset in itself to a calendar circuit;
• a calendar circuit which counts units of days and delivers output signals of valve operation times on the preset days to a logic circuit;
• a logic circuit which compares the time pulse signals from said electronic clock with the input signals from said calendar circuit and when they coincide delivers output actuating signals to a valve driving circuit;
• means for setting sprinkling time schedule on desired days arranged manually according to direct observation of the area to be sprinkled;
• a cancel circuit which cancels the preset sprinkling current time schedule according to a signal from a rain sensor;
• an automatic power off circuit which automatically turns off check signal lamps and displays to save energy;
• a valve driving circuit which is actuated by said logic circuit and controls the valve device;
• and
• an electric power source circuit consisting of a solar battery and a secondary battery, which supplies electricity to said electronic clock, said calendar circuit, said logic circuit, said cancel circuit, said automatic power off circuit, said valve driving circuit and a valve device that is to be operated.