A solenoid-operated valve controller includes a first signal line and a second signal line, which are connected respectively to ends of a first solenoid coil and a second solenoid coil. The first solenoid coil and the second solenoid coil have other ends, which are electrically connected in common to a switch. Plug Valves One of the first and second solenoid coils, which corresponds to signal states of a plurality of input signals that are supplied respectively to the first and second signal lines, is selected, and the switch is turned on and off to control the selected one of the first and second solenoid coils.Reducing Valves A solenoid-operated valve controller for controlling a double-solenoid-operated valve having a plurality of solenoid coils disposed on respective ends of a valve spool, comprising: a switch comprising a transistor having a drain terminal, a source terminal,BALL VALVES and a gate terminal; a plurality of signal lines wired in association with the solenoid coils, respectively; said signal lines being connected to respective ends of said solenoid coils; said solenoid coils having other ends, which are electrically connected in common to said drain terminal of said transistor; and a control circuit for selecting at least one of said solenoid coils and also permitting simultaneous selection of said solenoid coils, which corresponds to signal states of a plurality of input signals that are supplied respectively to said signal lines, and turning on and off said switch in order to control said selected one of the solenoid coils, wherein said switch is turned off during a period in which said solenoid coils are simultaneously selected by said control circuit. It is an object of the present invention to provide a solenoid-operated valve controller, which is effective to reduce the size of a solenoid-operated valve having a plurality of solenoid coils, such as a double- solenoid-operated valve, which can accommodate a reduction in space available for installing a control circuit for the solenoid-operated valve, and which is relatively inexpensive to manufacture. Another object of the present invention is to provide a solenoid-operated valve controller, which is capable of holding a movable member of a solenoid-operated valve reliably in position depending on the manner in which the solenoid-operated valve is used, even though the solenoid-operated valve is actuated at a reduced level of power consumption. The solenoid-operated valve controller is capable of keeping the movable member held in position even when an external shock is applied to the solenoid-operated valve when the solenoid-operated valve is in operation. According to the present invention, there is provided a solenoid-operated valve controller for controlling a solenoid-operated valve having a plurality of solenoid coils, comprising a switch, a plurality of signal lines wired in association with the solenoid coils, respectively, the signal lines being connected to respective ends of the solenoid coils, the solenoid coils having other ends electrically connected in common to the switch, and a control circuit for selecting at least one of the solenoid coils, which corresponds to signal states of a plurality of input signals that are supplied respectively to the signal lines, and turning on and off the switch in order to control the selected one of the solenoid coils.

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