Abstract: A decoder for a two-wire irrigation system is disclosed, having the ability to be remotely updated with new firmware over the two-wire network, the ability to download irrigation commands that can be executed at a later time, the ability to adjust its data speed when data corruption is encountered, and the ability to sense the position of an attached solenoid plunger.

Abstract: A system and method for driving a relay circuit involves driving a relay circuit using a first driver circuit if a voltage of a battery supply for the relay circuit is lower than a voltage threshold and driving the relay circuit using a second driver circuit if the voltage of the battery supply for the relay circuit is higher than the voltage threshold.

Abstract: Safety isolation systems and methods adapted for switching DC electrical power applications, including high voltage DC, are provided. A contactor is in series with a solid state DC switch and a switching circuit controls the operation of the contactor and the solid state DC switch. Mirror contacts may be added to the system that are capable of providing a reliable indication about the open/closed status of the main contacts of the contactor.

Abstract: A control unit has a closed-loop controller which is connected to a regulating electrovalve by way of a feedback branch, forming a closed-loop control circuit, in order to regulate the electrical coil current of the regulating electrovalve. The armature of the electrovalve is used to adjust a desired volume flow in a motor vehicle hydraulic device. The armature of the regulating electrovalve is continuously subjected to an armature oscillation in order to reduce the static friction and/or magnetic hysteresis. Inside the closed-loop controller of the closed-loop control circuit itself, the nominal current, which is supplied to the closed-loop controller on the input side as a command variable, is subjected to a dither signal generated inside the closed-loop controller for producing the armature oscillation, essentially synchronously to the clock cycle of the closed-loop controller.

Abstract: A semiconductor device and an electronic apparatus incorporating the semiconductor device are disclosed. The semiconductor device includes a power circuit that further includes a power transistor for providing current to a load (load current), a temperature detector for detecting the temperature of the power transistor, and a current detector for detecting the load current. If the detected temperature of the power transistor reaches a first predetermined temperature, and if the detected load current exceeds a first predetermined load current, a signal is output through an external terminal of the semiconductor device.

Abstract: A switchgear comprises a switching device, such as a relay, with a switching mechanism. A printed-circuit board that is provided with at least one electronic component is electrically connected to the switching device to form a supplementary electrical circuit, which receives an operating voltage supplied to the switching device.

Abstract: A current inductive timer socket comprises: a principle relay circuit including an output relay and a voltage input terminal, a reed relay circuit including a capacitor, a plurality of diodes, a reed relay and a resistance, a counter circuit including a DC rectifier, seven series-connected counters, and a time select switch, a holding circuit including a neon light, a photodiode, an operational amplifier, a transistor, a diode and a resistance, a time switch circuit including three time switches, and three series-connected exciting transistors, and an inductive and amplification circuit including a transformer parallel-connected to a rated resistor, a set of two-stage operational amplifiers, a resistance, and a capacitor.

Abstract: In an operation circuit of an electromagnetic switching device, when electric energy is discharged by discharge switches connected in series, respectively, to opening coils and closing coils, an induction current flowing in a direction opposite to a current of the coil of the excitation side is generated. The current flows through the coil on the non-excitation side due to magnetic coupling, and a magnetic flux necessary for driving is cancelled, thereby inhibiting generation of a driving force. The operation circuit includes first and second opening and closing coils, so that a moving element may be driven between those coils. This circuit includes a circuit for suppressing an over-voltage at the moment of interrupting an excitation current of a first coil and for interrupting an induction current generated through the first coil at the time of exciting the second coil.

Abstract: A power switching control device and methods for using the same to control a magnetic actuator within a power switching device are disclosed. The power switching control device uses a series of modulated current pulses to control a magnetic actuator within a power switching device. The power switching control device inputs a power signal and applies a series of modulated current pulses through the coil of the magnetic actuator in a first direction such that the actuator moves from a first position to a second position. Certain operating characteristics of a power switching device can be ascertained by analyzing the impedance of the magnetic actuator coil within the power switching device. The power switching device control device also has an improved energy management system therein. In this manner, the controller includes a voltage regulator that has the ability to switch between operating modes.

Abstract: A method of rapidly dissipating energy from a contactor controlled by a switching device, the steps comprising: operably connecting a metal oxide varistor to the switching device; interrupting electrical current to the contactor; absorbing energy from the contactor; and, limiting the amount of voltage across the switching device.

Abstract: The device drives one or more capacitive actuators with a control circuit. The device has a series circuit with a charging capacitor, a discharging capacitor, an electric coil, and the one or more actuators each with an associated selector switch. A discharging switch has a drain terminal connected to the node point between the two capacitors, and a source terminal connected via decoupling diodes to the drain terminals of the selector switches.