Abstract: A light-emitting device includes: a light source including light-emitting elements configured to oscillate in a single transverse mode; and an optical member that is provided on a light-emitting path of the light source and configured to diffuse and emit light emitted by the light source.

Abstract: An electronic device is provided. The electronic device includes a substrate, a semiconductor unit, a wall, and a light-transmitting member. The semiconductor unit is mounted on the substrate. The wall is disposed on the substrate and surrounds the semiconductor unit. The wall includes two exterior wall components and two interior wall components. The two exterior wall components are spaced apart from each other, so that two gaps are formed between the two exterior wall components. The two gaps are in spatial communication with an installation area that is surrounded by the two exterior wall components. The two interior wall components are arranged in the installation area and spaced apart from each other. The two interior wall components correspond in position to the two gaps and respectively shade parts of the two gaps. The light-transmitting member is disposed on the wall and covered on the semiconductor unit.

Abstract: Tunable VCSELs (TVCSELs) employing expanded material systems with expanded mechanical/optical design space for semiconductor DBR mirrors on GaAs substrates. One is the InGaAs/AlGaAsP material system. It adds indium In to decrease InGaAs H-layer bandgap for higher refractive index and higher DBR layer refractive index contrast. Adding phosphorus P gives independent control of bandgap and strain of AlGaAsP low refractive index L-layers. The tensile strain of AlGaAsP L-layer compensates compressive strain of InGaAs H-layer and lowers the cumulative strain of the multilayer DBR structure. Another option is the InGaAsN(Sb)/AlGaAsP material system, where both types of layers can be lattice matched to GaAs. It uses indium In and nitrogen N, and possibly antimony Sb, to get independent control of strain and bandgap, and thus refractive index, of dilute nitride InGaAsN(Sb) H-layers, with lower bandgap and higher refractive index than starting GaAs.

Abstract: In an embodiment a laser diode includes a surface emitting semiconductor laser configured to emit electromagnetic radiation and an optical element arranged downstream of the semiconductor laser in a radiation direction, wherein the optical element includes a diffractive structure or a meta-optical structure or a lens structure, wherein the optical element and the semiconductor laser are cohesively connected to each other, and wherein the semiconductor laser and the optical element are integrated with the laser diode.

Abstract: A measurement method of a surface-emitting laser includes a step of causing a surface-emitting laser to emit light and a step of positioning an optical axis of an optical system on each of a plurality of positions of the surface-emitting laser and measuring a spectrum at each of the plurality of positions.

Abstract: A semiconductor laser comprises: a substrate; a first cladding layer disposed above the substrate; a second cladding layer disposed above the first cladding layer so that the first cladding layer is positioned between the substrate and the second cladding layer; and a first mode expansion layer within the first cladding layer, a second mode expansion layer within the second cladding layer, or both the first mode expansion layer within the first cladding layer and the second mode expansion layer within the second cladding.

Abstract: An optical semiconductor device includes a semiconductor substrate with a protrusion that forms a lower end portion of a mesa stripe structure in a stripe shape extending in a first direction; a multi-quantum well layer in a stripe shape extending in the first direction on the protrusion, wherein the multi-quantum well layer forms an intermediate portion of the mesa stripe structure; a semiconductor layer in a stripe shape extending in the first direction on the intermediate portion, wherein the semiconductor layer forms an upper end portion of the mesa stripe structure; and a semi-insulating semiconductor layer in contact with side surfaces of the mesa stripe structure on both sides in a second direction perpendicular to the first direction. The optical semiconductor device may include a first electrode on a surface of the semiconductor substrate and/or a second electrode on the upper end surface of the mesa stripe structure.

Abstract: A light emitting device includes a substrate, and a laminated structure provided to the substrate, and including a columnar part, wherein the columnar part includes a first GaN layer having a first conductivity type, a second GaN layer having a second conductivity type different from the first conductivity type, and a light emitting layer disposed between the first GaN layer and the second GaN layer, the first GaN layer is disposed between the substrate and the light emitting layer, the light emitting layer has a first well layer as an InGaN layer, the first GaN layer has a c-face region, the first GaN layer has a crystal structure of a cubical crystal, and has a first layer constituting the c-face region, and a second layer as a GaN layer having a crystal structure of a hexagonal crystal is disposed between the first layer and the first well layer.

Abstract: A network element incudes a shelf including a main backplane having a busbar system thereon, wherein the shelf supports any of port modules and switch modules, wherein the modules interconnect to one another via cables; extension brackets configured to connect to one of a top and a bottom of the shelf; and a power shelf configured to connect to the extension brackets, wherein the power shelf supports one or more power modules; wherein the power shelf is configured at a top of the shelf when the shelf is located, in any of a rack, frame, and cabinet, above another shelf, and wherein the power shelf is configured at a bottom of the shelf when the shelf is located below the another shelf.

Abstract: A box with waterproof cable hole structure includes a lower case, a pressing block, an electricity cable, and a upper cover. The lower case includes an accommodating space defined therein and an opening connecting the accommodating space. A notch is formed on an edge of the opening, the notch has a lower pressing surface, and a lower cable groove is formed on the lower pressing surface. The pressing block is embedded into the notch. The pressing block further includes an upper pressing surface combined with the lower pressing surface, and the upper pressing surface includes an upper cable groove combined with the lower cable groove to form a cable hole. The electricity cable passes through the cable hole and is pressed between the upper pressing surface and the lower pressing surface. The upper cover is configured to be combined with the lower case to seal the opening.

Abstract: There is provided a resin structure including: a first resin body; a second resin body; and a third resin body. A recessed groove of the first resin body is configured to guide an inspection tool, which is used for inspecting an engagement state between a first engagement portion and a second engagement portion, toward the first engagement portion along the recessed groove in a state where the second resin body is assembled to the first resin body and the third resin body is not assembled to the first resin body. A groove bottom surface of the recessed groove and the second engagement portion engaged with the first engagement portion are spaced apart from each other in a thickness direction by a protruding portion protruding in the thickness direction of a wall portion of the first resin body.

Abstract: An enhanced apparatus and method for securing a wire to a pulling cable for pulling wire. Specifically, the pulling cable and wire are attached via a pulling head body. The wire is inserted into an end of the pulling head body and secured by crimping the pulling head body against the wire. Further, crimp zone indicators positioned on the outer surface of the pulling head body indicate the optimal zone of crimping to achieve substantial contact between the pulling head body and the wire. A pulling cable is secured to the pulling head body via a ball swage that comprises a tapped surface.

Abstract: A sealing assembly for sealing a bundle of wires includes a first sheet formed of a sealant material, a second sheet disposed above the first sheet, and a third sheet disposed above the second sheet formed of the sealant material. The second sheet includes a thermally conductive material. When the bundle of wires is overlaid on the assembly in a first direction, and the assembly is wrapped in a second direction that is generally perpendicular to the first to thereby surround the wires, the second sheet facilitates enhanced thermal energy distribution of applied heat throughout the assembly to thereby more uniformly melt the sealant material and thereby fill voids between the wires.

Abstract: A punch set for use with a punch tool to punch material from a wall of an electrical box. The punch set has a punch with a cutting section, and a die defining a cavity that is configured to receive the cutting section. The cutting section may have an annular or circular portion and a plurality of keyway forming portions each extending radially from the annular or circular portion. The cutting section of the punch may be insertable into the cavity of the die in a single orientation. The die may have a protrusion receivable within a recess of the punch when the cutting section is received in the cavity. One of the die or punch may have an extension that is receivable in a single orientation within an opening in the other of the die or punch.

Abstract: A resin structure has an insertion portion through which an electric wire runs. The resin structure includes a first resin body and a second resin body to be attached to the first resin body in an attaching direction so as to cover the opening portion. The first resin body includes a first wall portion forming a part of a wall portion perpendicular to the attaching direction, and a first insertion portion provided in the first wall portion and forming a part of the insertion portion. The second resin body includes a second wall portion forming another part of the wall portion, and a second insertion portion provided in the second wall portion and forming another portion of the insertion portion. When the first resin body and the second resin body are attached to each other, the insertion portion is disposed in the wall portion of the resin structure.

Abstract: A resin structure includes first and second resin bodies including first and second wall portions and first and second engagement portions, respectively. One of the first engagement portions engages with one of the second engagement portions and form a first engaging part. Another one of the first engagement portions engages with another one of the second engagement portions and form a second engaging part. The first engaging part is positioned on a further front side than the second engaging part in an attaching direction of the second resin body to the first resin body. When the second resin body is rotated toward the first resin body with the first engaging part as a center of rotation and with the one of the first engagement portions being engaged with the one of the second engagement portions, the first wall portion is prevented from interfering with the second wall portion.

Abstract: A weather-resistant electrical device enclosure that includes a base defining an interior and a rear wall for being mounted to a supporting structure, at least one opening in the rear wall for receiving an insert plate having an electrical device opening for receiving an electrical device, a forwardly-facing access opening for accessing the interior of the base, and a peripheral front rim surrounding the access opening remote from the rear wall of the base. A cover is pivotally-mounted in relation to the base and movable between a closed position and an open position. The cover includes a peripheral cover flange terminating at an outer edge extending around the cover and outwardly from the peripheral front rim of the base when in the closed position to define a parametrical water-deflecting overhang.

Abstract: In an electric junction box, both first locking portions and second locking portions are provided in one accommodation portion. The first locking portions are capable of locking an FL holder when the FL holder is inserted from an upper opening toward a lower opening. The second locking portions are capable of locking an FL holder when the FL holder is inserted from the lower opening toward the upper opening. Accordingly, the FL holders can be inserted into the same accommodation portion from the upper opening and the lower opening.

Abstract: An electrical junction box includes: a substrate unit having a circuit board on which a conductive path including a ground line is formed, a shield case for covering the circuit board, and a first fastening member for fastening the circuit board and the shield cases; a case unit having resin cases made of resin and a frame fixed to the resin case; and a second fastening member for fastening the circuit board in the substrate unit and the case unit, in which the shield case is electrically connected to the ground line by fastening the circuit board and the shield case with the first fastening member.

Abstract: There is provided an electrical junction box including: a bolt holding portion that includes a stud bolt and a bolt holding portion body configured to hold the stud bolt; a first holding portion that includes a first busbar provided with a first connection terminal and a first holding portion body configured to hold the first busbar and a first electronic component; and a second holding portion that includes a second busbar provided with a second connection terminal and a second holding portion body configured to hold the second busbar and a second electronic component. The bolt holding portion, the first holding portion, and the second holding portion are assembled with a nut in a connection state in that the stud bolt is passed through the first connection terminal and the second connection terminal, and in that the first busbar and the second busbar are overlapped with each other.

Abstract: Power supply systems are provided for carrying electrical power from a power source to a circuit board mounted on a housing, shelf, cabinet, etc. for supporting networking equipment. A busbar assembly, according to one embodiment, includes a pair of conductive strips configured to carry electrical power. The pair of conductive strips are arranged on a front-facing surface of a non-conductive vertical substrate. The busbar assembly further includes one or more alignment blocks configured to hold the pair of conductive strips in a fixed position with respect to the non-conductive vertical substrate. Each of the one or more alignment blocks is configured to guide a pair of power connectors of a circuit board for making electrical contact with the pair of conductive strips, while allowing simultaneous mating of signal connectors on the circuit board with signal connectors on the substrate, when the circuit board is being installed in a housing.

Abstract: A device includes an electro-mechanical switching device having an open-circuit and closed-circuit conditions and a path of least resistance having a path input and a path output with the switching device between the input and the output. The device includes a bypass power switch device that comprises a solid-state circuit interrupter and that is configured to conduct current between the input and the output in response to an open-circuit condition of the switching device. The device includes a current sensor that is connected to the output and configured to detect a fault current event. The device includes an actuator that is coupled to the switching device and a controller that is configured to generate a trigger signal to activate the actuator to cause the open-circuit condition of the switching device and to interrupt the fault current event by the power switch device, based on the detected fault current event.

Abstract: An arc-flash sensor may provide flexibilities for supporting both surface mounting and peek-through mounting on a panel (e.g., a wall panel or an electrical panel). The arc-flash sensor includes a translucent optical lens, a fiber-optic cable, and a skirt around the back side of the optical lens. The translucent optical lens diffuses the light produced in an arc flash to enhance the detectability of light signals picked by the fiber-optic cable. The fiber-optic cable enters parallel to the panel and perpendicular to principal axis of the optical lens. The parallel fiber-optic cable configuration reduces sensor installation space occupied and potential damage to the sensor. The skirt is used to prevent false tripping caused by unexpected events on the fiber-optic cable side such as camera flashes, lightning, sunlight, or the like.

Abstract: A system including an arc flash sensor that detects an arc flash event and an arc flash mitigation device in communication with the sensor. The mitigation device includes a path of least resistance having a path input and a path output. The arc flash sensor is located downstream the output. The mitigation device includes an electro-mechanical switch between the input and the output and an actuator. The mitigation device also includes a bypass power switch device that includes a solid-state circuit interrupter and that conduct current between the input and the output in response to an open-circuit condition of the switch. A system controller is provided to generate a trigger to activate the actuator to generate the open-circuit condition of the switch, which causes the power switch device to interrupt a fault current associated with a fault event in response to detection of the arc flash event.

Abstract: A protective element has a body, an inner connection layer, an outer connection layer, a heating layer and a low-melting-point alloy layer. The body is made of a single insulation material. The inner and outer connection layers are formed on two upper and lower surfaces of the body. The low-melting-point alloy layer is formed on the upper surface of the body and is electrically connected to the inner connection layer. The heating layer is mounted inside the body and is electrically connected to the low-melting-point alloy layer by the inner connection layer. The outer connection layer is electrically connected to the low-melting-point alloy layer and the heating layer. The outer connection layer is soldered on a power circuit. When the power circuit encounters overcurrent, the heating layer is heated to fuse the low-melting-point alloy layer faster. Thus, power circuit is cut to protect the power circuit.

Abstract: A circuit includes a first input terminal; a second input terminal; a first output terminal; a second output terminal; a first parallel circuit including a first transistor and a first capacitor; and a second parallel circuit including a first resistor, a second resistor, a diode, and a second capacitor. The first parallel circuit and the second parallel circuit are each connected in parallel between the first input terminal and the second input terminal and in parallel between the first output terminal and the second output terminal.

Abstract: A power flow control system and method relate to power flow control for faults on power transmission lines. An inverter has power switching devices and a capacitor. A power-safe circuit holds the power switching devices inactive during an initial fault current of the power transmission line, until a power supply for operating the inverter reaches a threshold.

Abstract: This electrical protection system for a DC-current medium-voltage electrical circuit, comprising a disconnection module, for generating a counter-voltage greater than the voltage of the source for a current flowing therethrough that is equal to at most a few percent of the nominal current of the device, a resistive limitation module connected between a first terminal and a second terminal and configured so as to reduce the intensity of the output current of the protection system in order to limit the current between a value and upon a low impedance fault downstream of the device, and a primary switching module coupled in parallel across the disconnection module and the resistive module. The primary switching module is configured so as to switch between a first state in which the primary switching module is conductive and a second state in which the primary switching module forms a short circuit.

Abstract: Embodiments of the disclosure provide an electrostatic discharge (ESD) device, including: an input pad; an underlapped field effect transistor (UL-FET) with a trigger voltage Vt, including: an underlapped drain region coupled to the input pad; a source region coupled to ground; and a gate structure coupled to the input pad; and a blocking layer separating the underlapped drain region from the gate structure of the UL-FET by an underlap distance.

Abstract: The present invention discloses an electrostatic discharge protection circuit having false-trigger prevention mechanism. A RC circuit, including an input control terminal, is coupled between an electrostatic discharge input terminal for receiving an input power and a ground terminal An inverter includes a P-type transistor circuit, including P-type transistors coupled between the electrostatic discharge input terminal and an output control terminal in series and having an internal connection terminal between two of the P-type transistors, and an N-type transistor, coupled between the output control terminal and the ground terminal. Gates of the P-type and N-type transistors are controlled by the input control terminal A switch transistor, having the gate controlled by the input control terminal, is coupled between the internal connection terminal and the ground terminal.

Abstract: A power supply apparatus includes a communication unit and a control unit. The control unit controls the communication unit so as to perform authentication communication with a cable after the cable is connected to the power supply apparatus, and controls the communication unit so as not to accept a request from an external apparatus connected to the cable in a period until the authentication communication is completed.

Abstract: A control system for a power distribution grid including an electrical distribution circuit includes a processor configured to perform operations including constructing a grid model comprising edges and nodes representing assets and transmission paths of the power distribution grid, generating an analysis of an operation of the power distribution grid over a predetermined time duration, determining a plurality of constraint violations based on the analysis of the operation of the power distribution grid within the predetermined time duration, generating a plurality of alterations to the power distribution grid, respective ones of the plurality of alterations resolving at least one of the constraint violations, selecting a first alteration of the plurality of alterations to the power distribution grid responsive to determining that the selected first alteration resolves at least two of the plurality of constraint violations, and autonomously implementing the first alteration to the power distribution grid.

Abstract: The proposed method for the aggregated control of a spatially distributed electrical load, performed on the basis of a hardware-software complex (HSC) and ensuring the maintenance of the balance of generated and consumed active power; planning the loading of generating capacities, taking into account the reserve for unloading consumers; secondary and primary frequency control; management of electrical energy (power) cost for consumers, reducing the purchase volume of electrical energy (power) during the hours of its maximum cost. 4 claims, 7 Figures.

Abstract: A system and a method for locally controlling delivery of electrical power along the distribution feeder by measuring certain electricity parameters of a distribution feeder line using a substation phasor measurement unit (PMU) electrically coupled to a substation distribution bus at a first node on the feeder line, and at least one customer site PMU electrically coupled to a low voltage end of a transformer at a customer site, wherein the transformer is coupled by a drop line to a second node on the distribution feeder line and the customer site is coupled by another drop line to the transformer, and by controlling at least one controllable reactive power resource and optionally a real power resource connected to the second node or at the customer site. Related apparatus, systems, articles, and techniques are also described.

Abstract: Architectures, apparatuses, methods, systems, and techniques for controlling electrical power distribution network are disclosed. Embodiment distributed, hierarchical controls including layered locational energy service control variables may be utilized to determine and control the provision of energy services, including real power, reactive power (VAR), and capacity reserves, by DERs in a distribution network. In a first ex-ante iteration a simulation may be performed to calculate a set of subnetwork-specific control variables based on subnetwork locational energy service prices and a plurality of sets of DER-specific control variables based on DER locational energy service prices. A second ex-ante iteration calculates a set of actual subnetwork-specific control variables based on subnetwork locational energy service prices and a plurality of sets of actual DER specific control variables based on DER locational energy service prices.

Abstract: A method is disclosed for identification of the mechanism of power system low-frequency oscillations and distinguish natural oscillations and forced oscillations using machine learning or neural network.

Abstract: Systems and methods for dynamic management of energy usage in local grids are provided. An example method is performed by a load distribution controller coupled to a power source and an energy storage device configured to accumulate power. The method includes acquiring reference levels of using energy of the power source at time slots within a time period and cost values corresponding to the reference levels, dynamically determining, based on the reference levels and the cost values, a schedule indicating charge levels of the energy storage device at the time slots within the time period, and configuring the energy storage device to charge or discharge the power the power according to the schedule. The reference levels are obtained using the Viterbi algorithm based on costs of the energy of power source at past times slots of a past time period and rates of charging and discharging the energy storage device.

Abstract: A string inverter control method includes: in a process of performing IV curve scanning on one or more first direct current/direct current step-up circuits, controlling a change of an output voltage of one or more second direct current/direct current step-up circuits on which the IV curve scanning does not need to be performed, where a change trend of the output voltage and a change trend of an input voltage of the one or more first direct current/direct current step-up circuits on which the IV curve scanning is performed present a non-strictly monotonically increasing relationship. Therefore, for the direct current/direct current step-up circuit on which the IV curve scanning is performed, a voltage difference between two ends of the direct current/direct current step-up circuit is not always in a relatively high state, so that a ripple current on an input inductor in the direct current/direct current step-up circuit can be reduced.

Abstract: A system and method for paralleling generators is described. A timing signal indicative of a waveform reference point of at least a first generator of the generators is received at a second generator. The receiving generator determines a closing time for a second generator breaker associated with the second generator in response the timing signal from the first generator. The first generator breaker and the second generator breaker, or an aggregated generator breaker is closed to a bus at the closing time.

Abstract: Disclosed is a method and apparatus for charging a battery, the method includes a method of charging a battery, the method including determining an aging rate coefficient based on an internal state of the battery and an aging parameter related to aging of the battery, predicting an aging rate of the battery based on the aging rate coefficient, and determining whether to change a charging limit condition to charge the battery based on a comparison between the predicted aging rate and a target aging rate.

Abstract: A battery charger is configured to independently charge a plurality of single cells in a battery of series connected single cells. In one example, the battery charger provides a plurality of independent charging current paths to the plurality of single cells via a plurality of removable charging connectors. Each charging connector is associated with a different charging stage and configured to connect to a single cell of a battery of single cells connected in series. A top charging stage and each of a plurality of middle charging stages are grounded by independent isolated grounds. A bottom charging stage is grounded by a main ground. The respective, independent grounds of the charging stages serve as the reference voltages for charging each of the single cells independently.

Abstract: An electric vehicle (EV) charging station for fast charging (e.g. 5 to 15 minutes) an electric vehicle (EV). The EV charging station can be configured to include one or more energy storage device comprising multiple electric reservoir modules.

Abstract: Methods and systems for protection/disconnect of airborne high-power/energy high-voltage modular multi-string battery packs (such as battery packs for airborne electric propulsion systems). The methods and systems are based on a dissimilar/redundant distributed battery pack protection architecture and use a smart mid-point battery disconnect in conjunction with centralized battery management system. The resulting battery disconnect/protection system is configured to detect bus faults, load faults and string faults and then take appropriate action to isolate the detected fault. For example, in response to a short circuit in one battery string, the faulty battery string may be disconnected from the positive and negative busbars while the remaining battery strings continue to provide power.

Abstract: A battery stack includes a plurality of battery management system (BMS) nodes and a controller. Each BMS node includes a battery, an isolation switch configured to selectably isolate the battery of the BMS node from the batteries of the other BMS nodes, and a bypass switch configured to selectably provide a path for electrical current flowing through the battery stack to bypass the battery of the BMS node. The batteries of the BMS nodes are electrically coupled in series. The controller is configured to control the isolation switch and the bypass switch of each BMS node such that the battery of each BMS node can be individually connected to and disconnected from an electrical power source/sink.

Abstract: A system and method for variable power transfer in an inductive charging or power system. In accordance with an embodiment the system comprises a pad or similar base unit that contains a primary, which creates an alternating magnetic field. A receiver comprises a means for receiving the energy from the alternating magnetic field from the pad and transferring it to a mobile device, battery, or other device. In accordance with various embodiments, additional features can be incorporated into the system to provide greater power transfer efficiency, and to allow the system to be easily modified for applications that have different power requirements. These include variations in the material used to manufacture the primary and/or the receiver coils; modified circuit designs to be used on the primary and/or receiver side; and additional circuits and components that perform specialized tasks, such as mobile device or battery identification, and automatic voltage or power-setting for different devices or batteries.

Abstract: Provided is an inexpensive charger which is compact and which yet provides favorable heat dissipation performance. The charger includes a charging circuit board comprised of an input/output interface component and a charging circuit component mounted on a substrate having a first face and a second face which are in parallel and front/back relationship with each other and a housing including a first housing body to which the charging circuit board is fixed and a second housing body engageable with the first housing body to form together an inner space in which the charging circuit board is to be accommodated. The second face of the substrate mounts thereon a heat generating component included in the circuit component. A heat dissipation pattern is formed at a part of the first face overlapped with at least a part of the heat generating component mounted on the second face as seen in a direction perpendicular to the first face.

Abstract: A versatile, modular power source is described which can be used as a worker pod to provide power to a portable device, to a residential/commercial power wall, or to a grid. The versatile, modular power source is designed to be replaceable and interchangeable to provide power to a variety of different targets.

Abstract: Various embodiments provide a charging device for a smoking substitute system, the charging device comprising: a first battery operable to charge a second battery in a smoking substitute system connected to the charging device, and control circuitry operable to: control charging of the second battery, monitor an output current of the first battery, and if the output current of the first battery is substantially non-constant, stop charging of the second battery. Some other embodiments provide a smoking substitute kit comprising the charging device and the smoking substitute system. Some further embodiments provide a method of charging a smoking substitute system.

Abstract: The present application discloses a multi-port energy storage battery. The multi-port energy storage battery comprises a battery case including a first port, a second port and a third port; a battery module, including a first interface, the first interface is connected to the first port, the battery module is configured to connect an external power supply module via the first port and first interface, so as to charge the battery module; a DC-DC converter, including a second interface and a third interface, the second interface is connected with the first interface, and the third interface is connected with the second port, the DC-DC converter is configured to boost battery voltage to a DC high voltage and then output it through the second port; a DC-AC converter, including a fourth interface and a fifth interface, the fourth interface is connected with the first interface, the fifth interface and the third port.

Abstract: A selectable USB charging cable which may have a switch configured to permissively control the transmission of an electrical current between two internet connected, or electronically powered, devices. By use of the reversibly selectable switch, a user of the charging cable may select an on configuration or an off configuration of the switch. The switch may reversibly stop the transmission of the electrical current between two electronically powered devices by use of a permissible selection between the on configuration and off configuration of the switch. The electrical current stopped by the switch may correspond to data transmission or power transmission to or from an electronically powered device.