Abstract: A phase-controlled power delivery system for a load such as an incandescent lamp controls the rate of transition of an AC power waveform as a function of switch temperature or other heat-related parameter to provide for time-varying optimization of a tradeoff between heat and noise.

Abstract: An automatically re-configurable solar array apparatus is disclosed. The apparatus includes a solar array electrically connected to an inverter through a power switch controlled by a microprocessor. The solar array comprises a combination of solar panel strings wired in parallel. Each solar panel string comprises a plurality of solar panels wired in series. An output electrical parameter level of the combination of solar panel strings is capable of producing output power from the inverter. The output electrical parameter level of the combination of solar panel strings is equal to about a predetermined electrical parameter level under sunny conditions. The solar array is pre-wired to permit microprocessor-controlled switching to reconfigure the array into solar panel strings of varying lengths. The electrical parameter level is at least one of a voltage level, a current level, and a power level.

Abstract: A field device comprises a transducer, a photodetector, a display, and a display controller. The transducer controls or monitors process variable, and the display shows information relating to the process variable. The photodetector detects a light level. The display controller is capable of switching the display on and off in response to changes in the light level detected by the photodetector.

Abstract: A protective device for galvanic cells (201, 202, 301, 302) which are interconnected via contact elements (205, 207, 209, 212, 405, 409, 406, 407, 506, 507, 509, 606, 607, 706, 707, 709, 805, 806, 807, 809) that are suitably connected to pole connections (203, 204, 503, 504) of said cells to give a battery can be associated with individual cells of a battery. The protective device has an activation device (1008, 1108, 1208, 1011, 1111) for activation. When the protective device is activated, the protective device bridges the cell associated therewith by changing the interconnection and thus removes it from the electrical functioning of the battery assembly. In the activation device, preferably an electroconductive or insulating component made of a shape memory material brings about the change of the interconnection by changing the shape of said component as soon as and/or as long as the temperature of said component lies outside a defined temperature range.

Abstract: In a signal processing circuit for an acceleration switch, it has been difficult to realize a circuit in which, when a system is powered off, almost no current is consumed, and, when vibration is applied, a sensor is activated to start detecting acceleration. In a signal processing circuit, one terminal of an acceleration switch is connected to a main determination section, another terminal of the acceleration switch is connected to one of a power supply control section and a power supply, and the main determination section determines occurrence of vibration applied to the acceleration switch. Based on a result of the determination, the power supply control section controls supply of power to one of a main control section or a sensor.

Abstract: A solar photovoltaic panel is disclosed that includes a photovoltaic cell, a local management unit connected between the cell and a string bus, and a bypass device connected to the cell that is operable to bypass the local management unit when conducting a flash test. The panel preferably further includes a transient detector connected to the cell that is operable to sense an output from the cell having a predetermined transient rise time. The transient detector and the bypass device may be contained within a junction box integrated into the panel and may include the local management unit within the junction box. The transient detector may include a switch connected to a circuit that electrically bypasses the local management unit when the switch is turned on as a result of an output transient rise time less than the predetermined time, thus facilitating a flash test of the photovoltaic panel.

Abstract: A power system with light-controlled function and the control method thereof, which power system comprising a light sensor module, a first microprocessor, a wireless transmitter, at least one controlled socket, a wireless receiver and a second microprocessor. The light sensor module outputs a first electrical signal according to the brightness of light. The first microprocessor is coupled to the light sensor module and outputs a first control signal according to the first electrical signal. The wireless transmitter is coupled to the first microprocessor and transmits the first control signal to the wireless receiver. The second microprocessor is coupled to the wireless receiver and the aforementioned controlled socket so as to control the state of power supply in the above-said controlled socket according to the first control signal.

Abstract: A temperature activated switching circuit 100, comprising a temperature activated switch U1 for switching an output 102 at a threshold temperature, the temperature activated switch U1 having at least one power input VCC for receiving power; and power switching circuitry for connecting a power source to said power input VCC of the temperature activated switch U1, the power source being initially disconnected from the power input VCC, and the power switching circuitry being configured to connect said power source to the power input VCC based on a detected temperature, in order to power up the temperature activated switch U1 before said detected temperature reaches said threshold temperature.

Abstract: A light-controlled power apparatus includes an insulating housing, a plurality of conductive terminals and a light-controlled circuit. The conductive terminals are disposed in the insulating housing and partially stretch out of the insulating housing for connecting with an AC power supply. The light-controlled circuit is disposed in the insulating housing and includes a power module, a control module and a switch module having a relay and a driving circuit. The power module is connected with the conductive terminals for getting and dealing with an AC input voltage to output an output voltage. The control module includes a light-detecting unit for detecting environment illumination intensity and then sending out a corresponding first signal, a light-detecting power unit for regulating the output voltage and then providing a work voltage for the light-detecting unit, and a switch control circuit unit capable of getting a second signal reflecting standard illumination intensity.

Abstract: When the interior temperature inside a line accommodating apparatus (100) measured by an apparatus-interior temperature sensor (103) is equal to or higher than a predetermined first threshold value, a control unit (105) shuts off the supply of power from a power supply unit (102) to a line module (101-1, 101-2) having a module temperature, measured by a module temperature sensor (104), higher than the sum of a predetermined second threshold value and the interior temperature.

Abstract: A thermal control power device has a thermal control circuit which includes a power module for getting and dealing with an AC input voltage, a control module, and a switch module having an electromagnetic relay and a driving circuit. The control module includes a microcontroller having a plurality of specific temperature value of constant temperatures therein, a power unit regulating an output voltage of the power module and providing a work voltage for the microcontroller, a temperature setting switch making choice of one of the constant temperatures, and a thermal detector detecting an environment temperature under which an external electric appliance works. The microcontroller compares the environment temperature with the constant temperature and then sends out corresponding control signals. The driving circuit controls switch states of the electromagnetic relay according to the control signals so as to further automatically control the electric appliance on-off.

Abstract: An outdoor extension line socket enabling remote controlled timing power supply is disclosed, comprising a socket body and a remote controller body, in which the bottom of the socket body is formed as a tapered body for sticking the socket body into the ground. The socket body consists of a socket, a display, a time adjustment button, an extension line plug and a socket power control circuit. In addition, the remote controller body consists of a time adjustment wheel, two switch control buttons and a remote control circuit. As the socket body being stuck on the outdoor ground, it is possible to provide electric power required for operations of an outdoor electronic device, and the power supply time of the socket body can be adjusted in accordance with the settings done by the remote controller body so as to designate the operation time of the outdoor electronic device.

Abstract: An apparatus supplies AC power to a load. The apparatus includes a set output terminals, a primary circuit, and a load sensing circuit. The primary circuit is electrically coupled to a source of AC power and to the output terminals for selectively providing power at a low voltage at the output terminals or electronically coupling the source of AC power directly to the output terminals. The load sensing circuit coupled to the primary circuit and the source of AC power for determining a resistance associated with the load at initial application of the load and controlling the primary circuit to electronically couple the source of AC power directly to the output terminals if a proper load is detected.

Abstract: In an electrical cord reel, a rotatable member can rotate about a winding axis to spool and unspool a linear material. An input power connector can couple to an electrical power source. An output power connector on the rotatable member can couple to an electrical cord at least partially wound about the rotatable member. A switch is adjustable to allow or prevent electrical current flow from the input power connector to the output power connector. One or more temperature sensors detect temperature inside a housing enclosing the rotatable member, output power connector, and a fan. A control system activates the fan if the detected temperature rises from a level below a fan-activation threshold to a level above the fan-activation threshold but below a power shut-off threshold. The control system moves the switch to an open position if the detected temperature is greater than or equal to the power shut-off threshold.

Abstract: An uninterruptible photosensing power controller for streetlight has a control box and a photosensing device. The control box has two sets of power cables and a socket. One set of power cables is connected to a utility pole and the other set of power cables is connected to a streetlight. The socket serves for the photosensing device to be plugged therein and fixed thereon. The photosensing device triggers the control box according to a luminance level of ambient light to control to supply a power from the utility pole to the streetlight. Since the photosensing device is directly fixed on the control box, the present invention simplifies the process and reduces the labor in installing a conventional power controller for streetlight.

Abstract: A thermogenerator arrangement is provided. The thermogenerator arrangement comprising an electrically operable device, switching means by means of which the device can be switched from a first, energy-saving state to a second, active state and at least one thermogenerator which generates an electrical signal when there is a temperature change in its environment, which electrical signal is forwarded to the switching means. The switching means are formed such that switching the device from the first state to the second state is effected in dependence on the electrical signal of the thermogenerator.

Abstract: Disclosed is an integrated circuit device comprising a startup operation circuit (101) for carrying out processing necessary for startup and a post-startup operation circuit (102) for carrying out a main operation after completion of the processing necessary for startup, wherein the post-startup operation circuit (102) has an operation guaranteed temperature whose lower limit is higher than a lower limit of an operation guaranteed temperature of the startup operation circuit (101), and the post-startup operation circuit (102) starts the main operation after a temperature of the integrated circuit device exceeds a threshold temperature which is equal to the lower limit of the operation guaranteed temperature of the post-startup operation circuit (102).

Abstract: A system for reducing the voltage of an AC electrical supply to a load for the purpose of energy efficiency, comprising a transformer and power converter in circuit between an AC electrical supply and a load, and a bypass switch S to cause the transformer to be taken out of circuit and to connect the electrical supply to the load in the event of a sustained overload of the transformer. The system includes means (14) to measure the temperature of the transformer, means (17) to measure the electrical current in the circuit and control means (15) receiving signals from the sensors (14, 17) and to operate bypass switch S to bypass the transformer and allow it to cool. A fuse F2 and thermal cut out device (16) are in circuit with the secondary winding of the transformer as failsafe means to interrupt the supply to the transformer in the event that the bypass switch fails to operate.

Abstract: A system for detecting and preventing electrical fire includes an intake fuse box, a main distribution panel/housing, a subdistribution panel/housing, a main power circuit (MPC) connecting the intake fuse box (IFB) to the main distribution panel (MDP), and a sub power circuit (SPC) connecting the MDP to the subdistribution panel. First-third gas/smoke/heat detectors are arranged in the IFB, main panel housing, and subpanel housing, respectively, and provide respective low level outputs for gas/smoke/heat exceeding a first threshold and high level outputs for a second threshold. A remote controlled main level circuit breaker is arranged in the MPC, a remote controlled sub level circuit breaker is arranged in the SPC, and a controller unit has first-third inputs connected to first-third gas/smoke/heat detectors, respectively, for receiving first-third low and high level outputs, an alarm output, and first and second breaker control outputs connected to respective main and sub level circuit breakers.

Abstract: This descriptive document is about a new low cost electrical power saving device that fulfills this objective detecting signals emitted by standard remote control units of electric appliances plugged to the device. Under one aspect, the device includes a male plug extending from a small, unitary housing that plugs into a wall outlet, a female receptacle disposed in the housing that accepts a power cord of an appliance, a timer and an infrared sensor on an outer surface of the housing that detects infrared pulses and generates a reset signal in response thereto, wherein, the timer has a reset state where the timer electrically connects power from the male plug to the female receptacle and a timed-out state where the timer disconnects power to the female receptacle, the timer enters the timed-out state a predetermined time period after receipt of a most recent reset signal from the infrared sensor and where the timer enters the reset state each time the timer receives a reset signal.

Abstract: An environment-activated automatic shut-off switch is disclosed. The disclosed embodiments allow power to be removed from a trailer auxiliary power circuit when the environment-activated automatic shut-off switch senses that the trailer is being put into motion. The disclosed embodiments of the environment-activated automatic shut-off switch do not require external control signals, such as those received from a vehicle tractor, in order to effectively control the trailer auxiliary power circuit and to ensure that the trailer ABS circuit has dedicated power while the trailer is in motion.

Abstract: The switching device comprises an electronic switch (111) embedded within a downhole tool (100) and an activator (20) for remote switching of the electronic switch (111). The activator (20) may be a handheld unit that is used at the surface of the wellbore by an operator or may be a wireline run unit. The activator (20) permits wireless and contactless activation of the electronic switch (111) without the need for mechanical switches which could provide a point of failure for the downhole tool (100). The electronic switch (111) comprises an electronics module and a power source such as one or more batteries (126) wherein in the active configuration, the switch (111) can allow electrical connection between the electronics module and the power source (126) and in the inactive configuration, the switch (111) prevents electrical connection between the electronics module and the power source (126).

Abstract: An electric power supply cut-off circuit comprises an IC which outputs a normal operation signal when the IC is operated normally, a switch which makes connection or disconnection between the IC and a power source, and a switching control circuit which continuously outputs a connection instruction signal during a period in which the normal operation signal is inputted from the IC, wherein the switch connects the IC and the power source when the connection instruction signal is inputted, and the switch cuts off the connection between the IC and the power source when the connection instruction signal is not inputted. Accordingly, it is possible to reliably avoid any excessive increase in the temperature of the IC and the ignition of the IC.

Abstract: Systems and methods for illuminating flight deck devices are disclosed. In one embodiment, a flight deck panel illumination system includes at least one illuminated panel having at least one illumination source, and a power supply coupled to the at least one illumination source and to an electrical energy source that is configured to selectively provide a suitable power conversion mode in response to an applied signal. A processor is coupled to the power supply to generate the applied signal.

Abstract: The switch device includes a control switch that turns on/off an electrical connection between an apparatus and the power supply, a condition judging circuit that judges conditions of driving the control switch, an electric wave reception circuit that receives an electric wave, and a power supply circuit that generates power from the electric wave received by the electric wave reception circuit. An electric wave transmission device that transmits an electric wave for making the switch device operate is arranged in a space, whereby the electric wave can be received by the electric wave reception device in the specific space. The switch device controls the control switch to be turned off/on when the electric wave is received. Alternatively, when the electric wave is not received, the switch device turns on/off the control switch.

Abstract: A power line communication device achieving suppression of electric power consumption is provided. Processing performed by a CPU of a PLC adapter includes the steps of sensing that a time to cut off electric power supply has come (S610), generating a message notifying that electric power supply will be cut off (S620), transmitting the message to equipment connected to the PLC adapter (S630), and emitting a command to cut off electric power supply to an RJ45 connector to a power feed circuit (S680) when a confirmation signal with regard to cut-off of electric power supply is received from the equipment (YES in step S640) and when cut-off OK is indicated (YES in step S650).

Abstract: Disclosed is an outdoor electrical power receptacle, comprising a main body, a mounting member, and an extension power cord, wherein an upper end of the mounting member couples to the main body. The extension power cord, couples to each of controllable power outlets disposed on the main body and extended out of the main body for connecting to an external power source. Herein, the main body further includes a power switching module, a wireless transceiver, and a microprocessor. The power switching module couples to each controllable power outlet. The wireless transceiver receives a control signal. The microprocessor coupled to the wireless transceiver and the power switching module, drives the power switching module so as to control each of the controllable power outlets to be conducted in response to the control signal. A control system of the outdoor electrical power receptacle according to the present invention is also provided.

Abstract: A system for controlling a heating and cooling system for use on a machine includes a condenser, an evaporator assembly, an electric motor driven compressor, and a master controller operable to determine and regulate an operational speed of the compressor. The master controller includes a plurality of control algorithms each receiving respective dynamic input information and outputting a respective controller speed request based upon the respective dynamic input information.

Abstract: A remote activation system is disclosed that consumes no standby power. The system comprises a remote electromagnetic radiation transmitter able to transmit radiation having sufficient power to enable the closure of a switch. The system also comprises an electrical activation element that is electrically attached to both the on-off circuit of an electrically powered device and a source of power to permit normal operation of the device. The activation element comprises a first electromagnetic radiation power converter able to convert electromagnetic radiation power into electrical power. It also comprises a first electrically operated normally non-conducting switch that is between a source of power for the device and its on-off circuit. The remotely activated device does not draw any power when it is turned off except for optional functions such as clocks that are not related to activation.

Abstract: A control apparatus for a load device mounted on a vehicle is provided with: a temperature sensor detecting a temperature of an inverter; a voltage sensor detecting an applied voltage of the inverter; and a control unit operating the inverter in a case where the applied voltage is a predetermined upper limit value or lower whereas stopping the inverter in a case where the applied voltage is higher than the upper limit value based on a voltage detection result by the voltage sensor. The control unit sets the upper limit value based on temperature dependency of a withstand voltage of an IGBT element included in the inverter and a temperature detection result by the temperature sensor.

Abstract: An electrical device configured to install within a wall mounted electrical box includes an antenna bezel frame, an antenna element, and a radio frequency circuitry component. At least a portion of the antenna bezel frame is configured to protrude through an opening in a faceplate. The antenna element is mounted to the antenna bezel frame such that the antenna element is located a distance forward of a plane that contains a front surface of the faceplate when the field configurable electrical device is installed. The radio frequency circuitry component is in electrical communication with the antenna element and is configured to receive a control signal from the antenna element.

Abstract: The present invention relates to a cord for powering a cooling element including a thermally-actuated switch assembly and a method of controlling a cooling element through a power cord including a thermally-actuated switch assembly in an alternating current (AC) circuit. The cord assembly includes a multiple conductor wire for carrying power and a heat reactive element. The heat reactive element is connected in line and integral with one of the conductors of the wire. The heat reactive element functions as a switch to conduct power through the wire in one state and to interrupt power through the wire in a second state. The heat reactive element changes from one state to the other state in response to ambient air temperature.

Abstract: A lighting control system comprises a plurality of toggle switches, a plurality of pushbuttons, a plurality of timer circuits, a plurality of relays, and a plurality of photocells to control a first plurality of lights, a second plurality of lights, a third plurality of lights and a fourth plurality of lights. The toggle switches and pushbuttons either control the lights directly or activate the timers to control the lights. The relays may be energized to switch on the lights. The photocells may be used to control the lights that are located in an outside setting.

Abstract: The invention relates to a wireless sensor device configured for sensing motion of an object in an area. The device comprises a motion sensor configured for generating a sensing signal when sensing motion in the area and a signal processor configured for processing the sensing signal. A power supply is provided for providing power to the motion sensor. Furthermore, the wireless sensor device comprises a controller configured for distinguishing, from the sensing signal, large object movements and small object movements of the object in the area. The wireless sensor device is configured to perform one or more power consumption reduction operations upon detection of large object movement. The power consumption reduction operations include temporarily disconnecting the motion sensor from the power supply and decreasing a duty cycle of the signal processor.

Abstract: The switching system for reducing standby power consumed by an electrical device includes a remote control device configured to selectively emit a radio frequency signal and a switching apparatus in electrical communication with a power supply and the electrical device. The switching apparatus includes a passive radio frequency receiver for receiving the emitted radio frequency signal and a switch. The passive radio frequency receiver converts the received radio frequency signal into electrical power. The switch is actuable, in response to the electrical power generated by the passive radio frequency receiver, from an inactive mode. The switch substantially restricts the electrical device consuming standby power from the power supply, to an active mode. The switch allows the electrical device to consume power from the power supply.

Abstract: A power-saving hand-held electronic device has a front side and a back side wherein each of the front side and the back side is provided with one light sensor, respectively, for controllably switching the hand-held electronic device between an operating mode and a power-saving mode. When the light sensor on the back side is blocked and the light sensor on the front side is triggered, the electronic device will be ushered into the operating mode or into the power-saving mode otherwise. The electronic device can determine whether the device should enter the power-saving mode, and it can effective control an automatic locking function with a view to achieving the synergistic effect of power saving and convenience.

Abstract: A system to control energy consumption in a room uses a wireless mesh network that allows for continuous connections and reconfiguration around blocked paths by hopping from node to node until a connection can be established, the mesh network including one or more wireless area network transceivers adapted to communicate data with the wireless mesh network, the transceiver detecting motion by analyzing reflected wireless signal strength.

Abstract: A monolithically integrated light-activated thyristor, in an n-p-n-p-n-p sequence consists of a four-layered thyristor structure and an embedded back-biased PN junction structure as a turn-off switching diode. The turn-off switching diode is formed through structured doping processes and/or depositions on a single semiconductor wafer so that it is integrated monolithically without any external device or semiconductor materials. The thyristor can be switching on and off optically by two discrete light beams illuminated on separated openings of electrodes on the top surface of a semiconductor body. The carrier injection of the turning on process is achieved by illuminating the bulk of the thyristor with a high level light through the first aperture over the cathode to create high density charge carriers serving as the gate current injection and to electrically short the emitter and drift layer.

Abstract: A circuit interruption device (110) is provided in which an interruption element (112) and a fuse element (114) are configured electrically in parallel. The interruption element includes an electrical conductor and a current interrupter capable of severing the electrical conductor to eliminate its capacity to carry current. An exemplary embodiment of a circuit interruption device is capable of detecting an interrupt control signal and actuating in response to the signal.

Abstract: A power system with light-controlled function and the control method thereof, which power system comprising a light sensor module, a first microprocessor, a wireless transmitter, at least one controlled socket, a wireless receiver and a second microprocessor. The light sensor module outputs a first electrical signal according to the brightness of light. The first microprocessor is coupled to the light sensor module and outputs a first control signal according to the first electrical signal. The wireless transmitter is coupled to the first microprocessor and transmits the first control signal to the wireless receiver. The second microprocessor is coupled to the wireless receiver and the aforementioned controlled socket so as to control the state of power supply in the above-said controlled socket according to the first control signal.

Abstract: A portable switching device may include a wireless receiver to receive a wireless signal from an occupancy sensor, and a power switch to control power to a load in response to the wireless signal. In some embodiments, the wireless signal may include an occupancy signal that indicates the occupied state of a monitored space. In other embodiments, the wireless signal may include a detector signal that requires further processing to determine the occupied state of the space.

Abstract: The invention relates to an electric circuit arrangement for generating or receiving an output signal or switched condition definitive for the effective locking condition of a door system, especially a motor vehicle door system. The object of the invention is to provide a circuit arrangement with which an output signal definitive for the locking condition of a door system can be furnished, the generation of which signal takes the intentions of a user or the instantaneous situation into account in improved manner.

Abstract: Circuitry for automatically powering on and maintaining activation of a powered down electronic component in a first device in RF communication with a second device, wherein the first and second devices are preferably an implantable medical device and an external control device, respectively. The system including power logic circuitry for generating a power on signal to automatically close a switch and energize an otherwise powered off electronic device when the power induced in the first device by external RF energy transmitted in the RF communication signal exceeds a minimum operating threshold of the power on logic circuitry. The electronic component while powered by the power source generates a hold signal and a second power signal that is transmitted to the power on logic circuitry to sustain power to the electronic component irrespective of interruptions of relatively short duration for less than a predetermined period of time in RF communication.

Abstract: In accordance with various aspects of the present invention, a method and circuit for reducing power consumption of a power strip is provided. In an exemplary embodiment, a power strip is configured for reducing or eliminating power during idle mode by disengaging an outlet from power input. A power strip may include two or more outlets and two or more outlet circuits, with AC power input connected to the outlets through the outlet circuit(s), which may include a current transformer, a control circuit, and a switch. The current transformer secondary winding provides an output power level signal proportional to the outlet load. If behavior of the current transformer secondary winding indicates that the outlet is drawing substantially no power from the AC power input, the switch facilitates disengaging of the current transformer primary from the outlet.

Abstract: A control apparatus of a single-phase power converter for a photovoltaic power generation system is disclosed, including a POS MPPT controller for calculating a rating current by applying a POS MPPT control method to an output current detected through a current transformer of a single-phase AC filter, a bandpass filter for filtering only signals of a low-frequency band from a load, a single-phase reference current generator for producing a reference current by matching a phase of the current from the POS MPPT controller to a phase from the bandpass filter, a single-phase current subtractor for subtracting an output current of a current transformer from the reference current calculated by the single-phase reference current generator to thereby calculate a difference current between the output current of the current transformer and the reference current, a PI controller for outputting a control signal, corresponding to the difference current from the single-phase current subtractor, to a PWM signal generator, a

Abstract: Photosensor circuits include a relay coil configured to control application of an alternating current (AC) power source to a load. A pulse width modulator circuit is configured to generate a pulse width modulated signal having a pulse width that varies responsive to an average voltage across the relay coil. A drive transistor controls the average voltage across the relay coil responsive to the pulse width modulated signal. A photo control circuit controls application of the pulse width modulated signal to the drive transistor responsive to a detected light level. A half-wave rectifier provide a power signal to the pulse width modulator circuit and the photo control circuit during one of the halves of the line cycle of the AC power source. The photo control circuit includes a phototransistor. A low pass filter circuit filters the output current of the phototransistor to provide a light level signal voltage.

Abstract: The present invention provides a power-saving hand-held electronic device comprising a front side and a back side, wherein each of the front side and the back side is provided with one light sensor, respectively, for controllably switching the hand-held electronic device between an operating mode and a power-saving mode, and when the light sensor on the back side is blocked and the light sensor on the front side is triggered, the electronic device will be ushered into the operating mode or into the power-saving mode otherwise. The electronic device of the present invention can determine whether the device should enter the power-saving mode, and it can effective control an automatic locking function with a view to achieving the synergistic effect of power saving and convenience.

Abstract: A photo controller circuit for use in hazardous areas has an output switching (OS) circuit comprising an alternistor for ON/OFF switching of a load, and an optoisolator for gating the alternistor. A light to voltage converter (LVC) circuit generates a DC voltage proportional to detected incident light. A hysteresis control (HS) circuit comprises a voltage comparator for generating an output depending on the DC voltage and the state of the OS circuit. An integrator and switching (IS) circuit turns on and activates the optoisolator when the output of the HC circuit indicates the detected incident light is below a selected level, and turns off and deactivates the optoisolator when the output of the HC circuit indicates the detected incident light is above a selected level. The IS circuit time delays the output of the HC circuit prior activating or deactivating the optoisolator. The electronic components are rated for 125° C.

Abstract: A cordless electronic device with power management system and method is provided that includes an outer surface, a power consumption circuit operable to consume power and for use in a cordless electronic device, a power supply circuit operable to regulate the power from a power source used to power the power consumption circuit of the cordless electronic device, a power control circuit operable to receive an input signal and to place the power consumption circuit in a lower or higher power state upon receipt of the input signal, a presence sensor operable to detect the presence of a user and to provide a presence sensor input signal to the power control circuit to place the power consumption circuit in the higher power state.

Abstract: An apparatus and method is disclosed for protection of a machine-controlled handling appliance having moving parts, having a safety sensor system for detection of objects in the working area of the handling appliance, having a safety controller which interacts with the handling appliance controller and in the process controls safety-relevant handling appliance functions as a function of signals from the safety sensor system. The safety sensor system has non-contacting proximity sensors so that a safety-relevant part of the working area of the handling appliance is covered by the detection areas of the proximity sensors.