Abstract: An electronic circuit for use with an exhaustible power source and load such as a light bulb, includes a microchip with an input that transmits a signal to the microchip when the load is activated or deactivated. The input does not form a serial link between the power source and the load. The power switch, by on/off switching, controls energy flow from the power source to the load. The electronic circuit has an automatic delayed shut-off function for the load and, a find-in-the-dark indicator and a power source level indicator which are active when the load is not energized and the power source is not being charged. The input to the microchip acts as an activation/deactivation user interface. The microchip allows the user to select specific functions based on the time duration of activation signals, the time duration between activation signals and the number of activation signals at the input.

Abstract: In a pressure switch, which emits an electrical switching signal as a function of the magnitude of a pressure which is supplied to it, which electrical switching signal assumes a first value when the pressure is less than the threshold value and which assumes a second value when the value is greater than the threshold value, the threshold value is adjusted—assuming that this is provided at all—by hand, for example by moving a cam disk which is coupled to a rotary knob. In order to adjust the threshold value by an electrical signal, the pressure is supplied to a pressure sensor, which emits an electrical output signal, which is a measure of the pressure which is supplied to the pressure sensor. The pressure switch is supplied with an electrical input signal which is a measure of the threshold value.

Abstract: An apparatus for controlling a door lock of a vehicle having an automatic door locking circuit includes a signal sensor and a removable control unit that is responsive to the signal sensor. The removable control unit generates a door lock state change signal when the signal sensor receives a signal having a first predetermined code value. A first controllable switch that is responsive to the removable control unit is removably couplable to the automatic door locking circuit. The first controllable switch is able to override the automatic door locking circuit so that when the door lock state change signal is asserted, the controllable switch applies power to the automatic door locking circuit, thereby causing a change of state of the door lock.

Abstract: A closed loop feedback system controls electrical switchgear that moves at least one contact relative to another contact to switch power on and off in an AC electrical circuit. The control system includes a position feedback device that is operatively coupled to at least one of the two contacts to produce contact position information. A processor receives and analyzes the contact position information to control contact motion to provide AC waveform synchronized switching. The electrical switchgear may be a capacitor switch that includes a bi-stable over-toggle latching device. The latching device maintains the contacts in one of an open stable position in which electrical current does not flow through the contacts or a closed stable position in which electrical current flows through the contacts.

Abstract: A network apparatus is provided, which allows another network apparatus to recognize the disconnection with reliability, if a power supply to the network apparatus is interrupted. A control unit operating with a first power supply outputs a first signal, which is level-converted and supplied as a second signal to an intermediate potential supply unit operating with a second power supply. In the intermediate potential supply unit, a switch receives a reset signal as a switch signal and outputs, when the power supply is interrupted, a ground potential to a driver instead of the second signal. As a result, an intermediate potential supplied to a cable is forcibly set to the ground potential.

Abstract: A solid state switching arrangement includes a transmission line which acts as a primary transformer loop and acts with secondary windings carried by switching modules to apply triggering signals to the switches. The arrangement may include greater than sixty modules.

Abstract: The invention relates to a switching element for modifying the electric resistance with at least one high temperature superconductor (1) and means (3) for irradiating electromagnetic high frequency onto the at least one high temperature superconductor (1). The invention further relates to a method for switching a high temperature superconductor (1) comprising the steps of providing a high temperature superconductor (1) in the superconducting state and irradiating an electromagnetic high frequency until the high temperature superconductor (1) changes over into a normally conducting state.

Abstract: A glass touch sensing circuit which is capable of accurately detecting a sense signal resulting from a user's touch under no influence of variations in temperature. The glass touch sensing circuit is adapted to compare the level of an output signal from a switching device, which indicates whether the user touches a touch sensor, with that of a reference signal and convert the output signal from the switching device into a wave-shaped signal in accordance with the compared result. The present glass touch sensing circuit is further adapted to determine the level of the reference signal for compensation for a variation in the output signal from the switching device with temperature. Therefore, the glass touch sensing circuit can be employed in a human body touch-based key input sensing system to provide a constant performance irrespective of a variation in temperature so as to sense a key input based on a touching operation.

Abstract: A micro-electro mechanical switch having a restoring force sufficiently large to overcome stiction is described. The switch is provided with a deflectable conductive beam and multiple electrodes coated with an elastically deformable conductive layer. A restoring force which is initially generated by a single spring constant k0 upon the application of a control voltage between the deflectable beam and a control electrode coplanar to the contact electrodes is supplemented by adding to k0 additional spring constants k1, . . . , kn provided by the deformable layers, once the switch nears closure and the layers compress. In another embodiment, deformable, spring-like elements are used in lieu of the deformable layers.

Abstract: A switching device includes two pushbutton switches to turn on/off an apparatus or to enable the apparatus to be turned on/off by a third switch by simultaneously pushing both two pushbutton switches for a predetermined time. It is suitable for the large apparatus as well as for the small and compact apparatus such as a remoter. Furthermore, it can also prevent child for purposely pushing the switch button. Therefore, it can provide an excellent protection to prevent error pushing.

Abstract: An electronic control, with a floating ac power supply, that compares the digital signals produced by connections between ac circuit nodes and digital nodes to determine whether path(s) in ac circuits containing the ac nodes are intact or open. The connections are made through passive components which limit the current between nodes to levels the digital devices can safely handle. An open path indicates to the control that a switching device is open, a connection has failed, or a that a load component has failed or is missing. An intact path indicates a closed switch or a present and presumably functional load component. Proper connections enable the control to detect the state of multiple paths while still being able to detect zero crossings. The method can determine the state of ac paths even if hot and neutral connections are inadvertently reversed.

Abstract: A controller input/output module visual indicator and safety means including a light redirector, terminal block assembly and at least one circuit having at least one light emitting diode or like light transmission means positioned distally from terminal block assembly. Each light redirector is configured to receive light from each corresponding light transmission means on a proximate end and redirect the light information to a distal end adjacent to the terminal block assembly for viewing by the control operator. An optional shield or side barrier may optionally be coupled to the circuit to provide operator safety from the high voltage signals which may exist on each input/output module.

Abstract: A transmitter (20,21), that may be hand-held, transmits radio frequency signals to a receiver within a low-voltage controller device (31, 32, 33, 34, 35). This controller device is installed in-line with the low-voltage power source (22, 23, 24, 25), and the low-voltage load (26, 27, 28, 29, 30). The system allows the user to remotely switch on and off individual controller devices, or a plurality of controller devices depending the address assigned at the transmitter and receiver. One aspect of the device is that it is installed in the low-voltage line, and therefore allows the user a more versatile control system than other devices.

Abstract: A dynamic battery array of individual cells, controllably interconnected for instantaneous dynamic configuration into a plurality of individual power buses having different electrical power output characteristics, each of which is tailored to supply the electrical power required at the instant by a particular electrical load within a circuit. Preferably the cells are fungible and randomly available so that at any given instant any given cell can be poweringly associated with a particular electrical load. The dynamic battery array, consisting of discrete cells lends itself to mounting on physically flexible substrates such as credit cards. The programmable array employs low resistance switch arrays for dynamically and instantaneously forming individual power networks or power buses between selected power cells and individual electrical loads in electrical circuits.

Abstract: A touch switch apparatus for detecting the presence of an object such as a human appendage, the apparatus having a touch pad and a local control circuit connected to the touch pad and to a controlled device. The touch pad preferable includes a first electrode and a second electrode spaced from and surrounding the first electrode. The control circuit is preferably in integrated circuit form. A signal is provided to the touch pad to generate an electric field thereabout. Introduction of a stimulus near the touch pad disturbs the electric field. The control circuit detects the electric field disturbance in and generates a control signal in response.

Abstract: A self-normalling jack with an electronically controlled normal circuit or relay comprising a pair of receptacles having a sensing means for sensing the insertion of a plug, the sensing means in communication with an electronic normalling switch or relay, the electronic normalling switch or relay in communication with a paired receptacle such that the electronic normalling switch or relay is located between the source terminal and the upper jack and between the lower jack and the destination terminal. The electronically controlled normalling circuit or relay also connects the source to the destination when no patch cord is inserted into either the upper or lower jack receptacle. When the patch cord is inserted into the upper jack, the source signal is connected to the patch plug. When the patch cord is inserted into the lower jack, the destination signal is connected to the patch plug. Inserting a cord into either jack receptacle disconnects the source from the destination.

Abstract: A method and apparatus for operating a power distribution system circuit breaker is provided. The circuit breaker includes an associated node electronics unit wherein a node electronics unit redundancy requirement is predetermined. The method includes monitoring electrical system parameters associated with the circuit breaker with the node electronics unit, communicating the electrical system parameters over a digital network to at least one central control processing unit, receiving commands and actions from the at least one central control processing unit over the digital network, determining circuit breaker actuation commands based at least partially on the received commands and actions, and operating the circuit breaker based on the circuit breaker actuation commands.

Abstract: In an electrical device for controlling functional units and processing data, for connection to an external data network communicating signals, and for switching between quiescent and active states, the improvement includes a control unit for controlling the functional units and having lines connected to the network for receiving signals starting data processing at the device, a power supply unit for supplying the units with energy, the supply unit primary side to be connected to a voltage supply and connected to the control unit, an electrical switch, connected to and switching the supply unit, entering into an open position and disconnecting the primary side from the voltage supply network in the quiescent state, and entering into a closed position dependent upon the power received from the ringing signal in the active state, and the switch remaining in one of the positions based upon the energy from the supply unit.

Abstract: An improved electrical panel design provides a modular, power-reliable, buss-lockout and true emergency-stop capabilities. Through the use of an interface, the approach eliminates numerous outdated, if not antiquated, parts, including safety locks, mechanical disconnect switches, E-stop safety relays, and safety Programmable controllers. The modular panel design saves interior panel space, permitting the use of single-door access, in some cases. Panel doors cannot be opened with live electricity without some form of electronic authorization, and a record of access is stored for future reference. Power may not then be reactivated with the doors opened, thereby virtually eliminating disconnect related accidents. Automatic shut down further occurs with a plant network emergency, ground-fault interruption, or panel door violation.

Abstract: A control apparatus has a momentary switch. In response to an operation performed on a momentary switch, a latch circuit (13) switches a latch output signal to be outputted to a microcomputer (11) from “high” to “low” and keeps the latch output signal “low”. A capacitor (C) supplies an electric power to the latch circuit (13) when supply of the electric power is cut off. A reset circuit (15) sends a signal to the latch circuit (13) in response to an input of a high-level latch reset signal from the microcomputer (11) so that the latch circuit (13) switches the latch output signal from “low” to “high”. If the latch output signal is “high” when the microcomputer (11) detects that the switch (SW) is operated, a transistor (Tr) is turned on under the control of the microcomputer (11).

Abstract: A charge pump circuit receives a battery voltage of a power line, and outputs a raising voltage proportional to the battery voltage. A low voltage detecting circuit detects a low voltage state in which a detecting voltage obtained by dividing the raising voltage. Thus, it is possible to indirectly detect a low voltage state in which the battery voltage is lower than a predetermined threshold value. When the low voltage state is detected, a drive circuit turns off a MOSFET. At this time, the battery voltage is temporarily varied, but the charge pump circuit has a filter action and a delay action, whereby temporary variation does not easily appear in the raising voltage (detecting voltage), and an error in operation of the MOSFET can be prevented.

Abstract: An improved energy controller that increases the electrical efficiency of AC induction motors and electrical lights that is comprised of a microcontroller integrated with a signal control circuit to regulate the amount of the input line A/C signal that passes from the input the to electrical device. The microcontroller includes circuitry to measure the phase of the voltage and current of the input A/C signal and the shift of the phase across the motor or electric light. Using this phase difference, the microcontroller can determine the power factor and regulate the amount of power provided to the electric motor or light in response to changes in loading on the motor or light. The energy controller includes software that enables the microcontroller to provide a soft-start for induction motors.

Abstract: An electrical power strip that can be used in conjunction with a computer so as to allow peripheral devices associated with the computer to be automatically turned on or off simultaneous with the computer being turned on or off. The power strip preferably includes a USB connector that allows the power strip to be connected to the power source provided by the USB port of a computer. The power strip further includes a relay element that effectively energizes the power strip when the connected computer is turned on and de-energizes the power strip when the computer is turned off. Thus, the user can utilize the power strip to ensure that any peripheral devices plugged into the power strip are automatically turned off when the connected computer is turned off and turned on when the computer is turned on.

Abstract: A controllable power-economizing extension sockets includes a socket body, a main control socket and plural interactive sockets formed properly spaced apart in the socket body, a voltage stabilizer, and a capacitor and an electro-magnetic switch connected between the input terminal of power and the main control socket. The electro-magnetic switch is connected to each of interactive sockets to form a control circuit. The voltage stabilizer supplies a constant voltage to let the electro-magnetic switch operate to let the interactive sockets for peripheral electric or electronic appliances turned on or off synchronously with the main control socket.

Abstract: A power supply circuit is provided in which among various actuators to be controlled, measures are taken for actuators other that one actuator that tend to be influenced by the behavior of the one actuator, in which power is supplied to a plurality of control lines through a single voltage increasing circuit, and which can be manufactured at an economical cost. A power supply circuit is constructed such that power is split from a voltage increasing circuit for increasing an on-board power source voltage and supplied to a plurality of control lines. Power is supplied to a plurality of loads by a driving circuit, the loads are individually driven by activating switches, and a load is driven by a driving circuit. An auxiliary control line is connected to one control line so that auxiliary voltage can be applied. A voltage-holding circuit is provided in the other control line to eliminate influence of the activation of the one control line on the other control line.

Abstract: An apparatus and method for supplying power to a load circuit from main and alternate electric power sources involves actuating a signal-controlled selector inside a housing, at least a portion of which is received in a breaker receptacle of an electric power distribution panel such that a first conductor on the housing is operable to receive electric power from the electric power distribution panel and a second conductor on the housing is operable to receive electric power from an alternate electric power source, to selectively connect the load circuit to the first conductor on the housing or to a second conductor on the housing operable to receive electric power from an alternate electric power source, in response to a control signal.

Abstract: A timer whose purpose is to apply or remove power to or from an attached load during a monostable timing interval. A selection switch determines whether the attached appliance is on or off during the timing interval. The period of the timing interval is determined by the adjustment of a potentiometer or other control element and the timing interval is initiated by the closure of a momentary contact switch. Standard electrical interfaces are provided to allow the device to be interfaced to a standard receptacle and to provide a similar receptacle to the attached appliance.

Abstract: The invention concerns a control circuit for controlling a power switch by means of a galvanic insulation transformer, the transformer being produced in the form of planar conductive windings on an insulating substrate (20) whereon are integrated passive components constituting a high frequency excitation oscillating circuit for a primary winding of the transformer, the transformer substrate being directly mounted on a wafer (24) whereon is mounted a circuit chip (40) integrating the power switch.

Abstract: A power supply control device for an image forming apparatus of the present invention includes a shutoff detector for monitoring the state of a power switch. In response to the output signal of the shutoff detector representative of the turn-off of the power switch, a shutoff processing section executes processing for avoiding accidental error detection and protecting a memory before the output voltage of a DC power supply drops to a preselected level.

Abstract: The present invention discloses a light switch designed physically similarly to a present day conventional light switch having a face plate and on/off switching capability for connection to standard house current using 110/115 volts AC electricity. The present invention discloses the light switch having memory capability wherein the light usage patterns actually used by the household resident can be stored into memory so that when the household residents are away from home they can activate the memory of the present invention so that the light switches are operated in their absence according to the actual usage pattern which has been exhibited by them while present in the house.

Abstract: A hot swappable system is described. It included software controlled hot swapping operations which provided a graceful booting or power-down of the system. In the even of force insertion or extraction of the system blades, a set of hardware features (such as using different pin lengths in the connectors and dampening resistor) prevents these types of operations from damaging the system hardware or affecting the operation states of other blades within the system.

Abstract: It is an object of the present invention to provide an uninterruptible switching regulator with which smaller size and lower cost can be achieved while the power supply efficiency is raised, which is accomplished by the effective utilization of an RCC type switching circuit. When the commercial AC input power supply 1 is operating normally, the AC-side RCC type switching circuit 21 is operated preferentially to supply power to the secondary drive circuit 25, but when there is a power outage with the commercial AC power supply 1, the DC-side RCC type switching circuit 69 is operated to supply power to the secondary drive circuit 25, and these two switching circuits can be switched at high speed.

Abstract: A circuit (10) for connecting a power distribution bus (14) to a battery (12) has a connector circuit (20) and a switch (40). The battery has a positive battery terminal (16) and a negative battery terminal (18). The switch (40) has a control terminal (46), a first terminal (42), and a second terminal (44). A contactor circuit (48) is coupled between the battery (12) and the power distribution bus (14). The contactor circuit (48) has a solenoid (50) and a plunger switch (52) that is operably coupled by solenoid (50). In one embodiment of the invention the connector circuit has a switch (38) used to allow the connector terminals to be coupled at different times to the circuit. In the second embodiment, different length terminals may be used to enable coupling of the battery terminals at different times.

Abstract: A switching scheme that permits a thee phase capacitor bank to have two ratings depending on whether the circuit is connected in delta or star configuration The capacitor per phase consists of two sections. In delta connection the two sections are connected in series. In the star connection the two sections are connected in parallel. Both the changes —the delta connection to the star connection of the circuit and the series connection of the capacitor sections to the parallel connection of the capacitor sections—are accomplished simultaneously by a single switching operation of three star connected switches. In the case of isolated neutral, the number of switches can be reduced from three to two.

Abstract: A remote locking release device in a bicycle wheel locking apparatus, including: a remote controller; a light signal receiving unit for generating a locking release signal by a locking release requirement signal received from the remote controller; a position detecting unit for detecting the present position of a locking bar and generating a locking state signal; a controller for generating a relay control signal by the locking release signal and the locking state signal; a relay driving unit for supplying a relay driving voltage by the relay control signal; and a relay for releasing the locking state by the locking bar with falling down a stopper by the delay driving voltage.

Abstract: A CPU (31) captures an on control signal for low-voltage loads (26 to 28) in LAN multiplex transmission, controls low-voltage switching devices (36 to 38) to be turned on in order to supply a power to the low-voltage loads (26 to 28), and performs a DC supply from a low-voltage battery (29) to the low-voltage loads (26 to 28). In this case, immediately after the on control signal for the low-voltage loads (26 to 28) is captured, the CPU (31) controls a voltage converter (32) which is not operating, so as to be activated, thereby performing a DC supply to the low-voltage battery (29) and the low-voltage loads (26 to 28).

Abstract: A fuel dispenser system is provided in a standard configuration based upon a single supply voltage requirement that is independent of the available local power supply sources. A supply voltage apparatus integrally coupled to the standard dispenser configuration employs a transformer to adapt the field supply voltage from the local power supply to the voltage level needed by the dispenser devices such as the power supplies.

Abstract: A motor operator for an overhead power switch is disclosed including a microcontroller, a unique and powerful array of well-integrated sensors, a motor and drive developing substantial torque and speed and coupled to a switch actuator and responsive to the microcontroller, and a sophisticated program algorithm stored in memory at the actuator site for dynamically controlling, i.e., governing the various control modes as called for by changing conditions. The sensors include an encoder associated with the motor and drive that develops position information signals fed to the dynamic microcontroller to compute real time information including position, speed, and stopping distance used in conjunction with remote operate commands to open, close and monitor status of the switch in the various ways disclosed.

Abstract: A power plug device has a power plug, at least one switched power socket at least one socket switch, a embedded controller and a telephone jack. The embedded controller can send and receive network signals across a telephone line through the telephone jack, or across a power line through the power plug of the power plug device. The power plug device may switch on or off its power sockets depending on networking signals that come from the power or telephone lines. The power plug device can also send networking signals out along the telephone or power line. The power plug device also has a networking communications port. Two such power plug devices enable two or more computers to communicate with each other using the existing power and telephone lines within a building.

Abstract: The electrical equipment of the present invention is operated such that the ON operating member for the primary power supply supplying circuit is manually operated, the switch device S is turned ON and when a supplying of electrical power for the primary power supply supplying circuit is shut off, the circuit for the control system is operated and upon performing a predetermined security processing, the driving source is driven, the OFF operating member is automatically operated, the switch device S is automatically turned OFF and supplying of an electrical power to the primary power supply supplying circuit is automatically shut off, so that it is possible to perform an appropriate processing before shutting off the primary power supply supplying circuit and thus it is also possible to provide electrical equipment showing a high safety characteristic.

Abstract: A smart card reader includes a housing for receiving a smart card, a microprocessor, and a connector for connecting the microprocessor to the received smart card for establishing communications therebetween. A voltage source provides a power supply voltage to the microprocessor based upon the smart card being received in the housing. The smart card reader further includes a first switch interposed between the voltage source and a power supply terminal of the microprocessor. The first switch is closed when the received smart card is at an end of travel in the housing so that the power supply voltage is provided to the microprocessor, and is opened when the received smart card is no longer at the end of travel in the housing so that the power supply voltage is not provided to the microprocessor.

Abstract: A system for arming and disarming a central intrusion alarm system control utilizing the activation status of a particular appliance. The system employs a detector for determining the position of an on-off switch associated with a particular appliance. The regulator prevents the operation of the arming control in a central intrusion alarm system when the detector determines that the appliance is “on”. The system of the present invention may be employed with multiple appliance switches. In addition, transmission of the disarming signal to the central intrusion alarm arming control may be accomplished through hard wires or by radio transmission.

Abstract: A powering arrangement for an undersea cable system provides that each branch of the system is supplied with a current equal to half of the current in the trunk. By coupling both branches to the trunk, the current adds at the branching unit. Upon occurrence of a power path fault in any branch, a virtual ground moves to the site of the fault. In addition, an image virtual ground moves to a similar point in the branch that does not have the cable fault. As a result of this implementation, the cable power system is able to tolerate at least one fault in a branch without necessitating repair, and can tolerate some multiple branch faults depending upon their location. In contrast to the operation of existing power-switched branching units, the fault-tolerant branching unit does not require down-powering and re-powering in order in order to change the power configuration, e.g., to allow a virtual ground to be re-located at shunt fault sites that occur in either trunk or branches.

Abstract: An apparatus having a power supply section capable of outputting plural power supply voltages is provided with a sleep mode (energy-saving mode) for inhibiting at least one of the outputs from the power supply section in a wait state. Furthermore, an image forming apparatus such a printer is provided with a cut-off function for inhibiting at least one of the outputs from the power supply section supplied to a heater of a fixing device if an abnormality is detected, so that by relating the operation of this cut-off function and the operation of inhibiting at least one output at the power supply section to each other, these operations may be more easily controlled and also the number of components required can be reached.

Abstract: Apparatus for automatically selecting one of two or more available power supply voltages for use as a main power supply of a PCI adapter is described. In one embodiment, a power supply selector is designed such that the presence of a positive voltage at a Vaux input thereof prevents power at a Vcc input thereof from driving a main power supply input to a PCI adapter. Conversely, the absence of a positive voltage at the Vaux results in the main power supply input to the PCI adapter being derived from the Vcc input. In an alternative embodiment, jumpers are provided for enabling a user to select which power supply will be used as the “default” power supply for the adapter.

Abstract: A leak current is prevented from flowing during a power off state in a power supply unit having a remote power on/off function by using the momentary switch. In a state of power off, i.e. a state in which a switch SW2 is turned off, power is not applied to a latch circuit 30, and hence power is not consumed. A switch drive circuit 40 does not consume power. When a user depresses a momentary switch SW1 during a state that the switch SW2 is turned off, the switch drive circuit 40 turns the switch SW2 on. As a result, the latch circuit 30 can receive a drive voltage VCC from a node located down stream of the switch SW2, so that it can store or latch the turn on state of the momentary switch SW1. After that, when the user releases the momentary switch SW1, it returns to an original position and operation of the switch drive circuit 40 which turns the switch SW2 on is terminated.

Abstract: A memory package for storing data and capable of being added to or replaced while being provided with a battery backup in computer systems which can be mounted with a plurality of said memory packages. A memory package also has a function to reduce power consumption of the battery backup to a minimum, when the memory package with battery backup is inserted into the computer system without the main power being applied. Consequently, even if additional memory packages are inserted in computer systems installable with memory packages having battery backups, only a weak current need be supplied from the backup power supply so that the battery will not run down after a short time. The memory packages can therefore be added and replaced while still storing data internally and the memory capacity can be changed. Also, a memory system is provided including a power supply supplying power supply lines connected to the memory packages.

Abstract: A changeable power sensing switch includes a sensor, a process actuating circuit and an output control port for detecting and sensing different external signals and triggering a work unit to perform work desired. The sensor sensitivity may be adjust to suit different dielectric medium and sensing distance. The switch is more versatile and has wider applications than conventional mechanical switch.

Abstract: A system and method for reduced standby power consumption in a display device. In one embodiment, a circuit for power mode switching between a main mode and a standby mode of a display device is provided. In this embodiment, the circuit comprises a power supply unit coupled to a power source for receiving an input power signal and for generating output power signals when the display device is in the main mode. The circuit also includes an opto coupler coupled to a computer and responsive to a sync signal therefrom. The opto coupler is also coupled to the power supply unit for selectively sending an OFF signal thereto when the opto coupler does not detect the sync signal from the computer. Moreover, in this embodiment, the power supply unit shuts down and stops generating the output power signals in response to the OFF signal, thereby switching the display device to the standby mode.

Abstract: A battery powered radio programmable remote switch controller and a separate hand held programming unit (programmer) designed to conserve the life of the life of the controller batteries using a combination of low voltage circuitry in the controller and a magnetic switch in the controller that is triggered by the programmer. When brought into proximity with the controller, a magnet in the programmer activates a magnetic switch in the controller which energizes a radio receiver in the controller to receive programming transmitted by the programmer. After downloading the program, removal of the programmer from the proximity of the controller deactivates the magnetic switch turning off the radio receiver, thereby saving over 99% of the power otherwise required to continuously monitor for a radio signal.