A replaceable socket device includes adapters and a base. Each of the adapters include a jack and contacts disposed on a bottom of the adapters. The base includes sockets, an adapting interface disposed on the socket, and a coupling interface coupled to the adapting interface and an external power source. Each socket includes a bottom surface and a sidewall perpendicularly connected to the bottom surface. One of the adapters inserts in the socket via an opening formed by the bottom surface and the sidewall. The adapting interface is utilized to connect the socket and one of the adapters. The coupling interface is configured to conduct electrical signal from the external power source to the adapting interface. The structure of the adapting interface is used for allowing one of adapters to couple to the socket via the adapting interface. The adapting interface is lower than the bottom surface of the socket.

There is provided a power connector system for electrically connecting a power source to a device. The power connector comprises a first component and a second component which each have a plurality of electrical contacts disposed on a face thereof. The contacts each include an electrically resistive element having an impedance. When the first and second components are coupled, a logic unit controls enables current flow between the first and second components based on the impedances.

There is provided a power connector system for electrically connecting a power source to a device. The power connector comprises a first component and a second component which each have a plurality of electrical contacts disposed on a face thereof. The contacts each include an electrically resistive element having an impedance. When the first and second components are coupled, a logic unit controls enables current flow between the first and second components based on the impedances.

A connector has a first end provided with a first interface and a second end provided with a second interface. The second interface includes a first switch unit and a second switch unit, where the second switch unit is connected to a control terminal of the first switch unit and a ground pin of the second interface, and a preset reference voltage is input into the ground pin of the second interface. In a case that the second interface is disconnected from a to-be-charged device, the first switch unit is in an off state. In a case that the second interface is connected to the to-be-charged device, the ground pin of the second interface is connected to a ground pin of the to-be-charged device, the ground pin of the second interface is grounded, and the first switch unit is in an on state.

A night light includes a housing, AC-to-DC circuitry, at least two prongs configured to connect to a power source outlet, at least one LED, first and second optical elements for converting light beams from the LED into substantially uniform light emitted from the optical elements, a switch configured to manually select from a plurality of illumination modes, sensors to automatically select between the illumination modes, and means for wireless communication, and at least one second optical element. The LED might be a multi-color LED.

A resettable switching apparatus, useful in a GFCI receptacle, has a housing with a face plate and at least one sense transformer core positioned to define a current flow direction through a center cavity that is parallel to the face plate. The GFCI receptacle further includes a space-efficient coaxial configuration in which a mechanical latching arrangement for resetting (i.e., closing) main switch contacts is disposed inside the trip solenoid. A movable carriage for the main contacts spans one end of the solenoid and has a latching portion in the solenoid that engages the inner end of a reset plunger in two sequential states (i.e., unlatched and latched). The mechanical latching arrangement comprises a cam surface coupled to a lifting plate, which is connected to the carriage of the GFCI receptacle. The cam surface is responsible for translating a downward movement to a translational movement to engage the carriage to the rest plunger.

A resettable switching apparatus, useful in a GFCI receptacle, has a housing with a face plate and at least one sense transformer core positioned to define a current flow direction through a center cavity that is parallel to the face plate. The GFCI receptacle further includes a space-efficient coaxial configuration in which a mechanical latching arrangement for resetting (i.e., closing) main switch contacts is disposed inside the trip solenoid. A movable carriage for the main contacts spans one end of the solenoid and has a latching portion in the solenoid that engages the inner end of a reset plunger in two sequential states (i.e., unlatched and latched). The mechanical latching arrangement comprises a cam surface coupled to a lifting plate, which is connected to the carriage of the GFCI receptacle. The cam surface is responsible for translating a downward movement to a translational movement to engage the carriage to the rest plunger.

A circuit to protect an overvoltage in a universal serial bus (USB) device include an overvoltage protection (OVP) switch connected to a pin of a USB receptacle and a switch controller to turn off the OVP switch when an overvoltage is detected such that power between the pin and the USB device is interrupted. The switch controller supplies a control signal to the OVP switch such that the OVP switch has a first on-resistance when the USB device is operating in a normal mode and no overvoltage is detected, and has a second on-resistance, higher than the first on-resistance, when the USB device is operating in a low-power mode and no overvoltage is detected.

A circuit to protect an overvoltage in a universal serial bus (USB) device include an overvoltage protection (OVP) switch connected to a pin of a USB receptacle and a switch controller to turn off the OVP switch when an overvoltage is detected such that power between the pin and the USB device is interrupted. The switch controller supplies a control signal to the OVP switch such that the OVP switch has a first on-resistance when the USB device is operating in a normal mode and no overvoltage is detected, and has a second on-resistance, higher than the first on-resistance, when the USB device is operating in a low-power mode and no overvoltage is detected.

A method for electrostatic discharge protection in a receiver and associated receiver are provided. The receiver includes a reference voltage terminal, a detection terminal, at least one set of receiving terminals and at least one set of termination resistors. The method includes: according to a voltage level of the detection terminal, generating a detection result; and according to the detection result, controlling whether to configure said at least one set of termination resistors to be respectively coupled between said at least one set of receiving terminals and the reference voltage terminal.