Electrical wiring device for delivering power to multiple mobile devices

An electrical wiring device, comprising:

• a USB port accessible through a faceplate of the electrical wiring device, wherein the USB port is configured to provide a charging current to a device connected to the USB port;
• a current sensor configured to generate a current sense signal representative of an amount of the charging current drawn by the device connected to the USB port;
• a controller operably connected to the current sensor to receive the current sense signal, the controller being configured to operate at least one LED to indicate that the device connected to the USB port has reached a predetermined charge when the current sense signal indicates that an amount of the charging current drawn by the device connected to the USB port is below a predetermined threshold;
• a second USB port accessible through the faceplate of the electrical wiring device, wherein the second USB port is configured to provide a second charging current to a second device connected to the second USB port;
• and
• a second current sensor configured to generate a second current sense signal representative of an amount of the second charging current drawn by the second device connected to the second USB port, wherein the controller is operably connected to the second current sensor to receive the second current sense signal, the controller being configured to operate at least one second LED to indicate that the second device connected to the second USB port has reached a predetermined charge when the second current sense signal indicates that an amount of the second charging current drawn by the second device connected to the second USB port is below a second predetermined threshold.

An electrical wiring device, comprising:

• a USB port accessible through a faceplate of the electrical wiring device;
• a controller configured to determine a power level to provide to the USB port;
• and
• a thermistor disposed in proximity to the USB port such that a resistance of the thermistor changes in response to a temperature change of the USB port, wherein the controller is configured to detect a value representative of the resistance of the thermistor and to change the power level provided to the USB port when the value representative of the resistance of the thermistor reaches a threshold, wherein the thermistor receives at a first terminal an applied voltage that is applied to the voltage divider and at a second terminal a resistor of the voltage divider.

An electrical wiring device, comprising:

• a USB port accessible through a faceplate of the electrical wiring device;
• a controller configured to determine a power level to provide to the USB port;
• and
• a thermistor disposed in proximity to the USB port such that a resistance of the thermistor changes in response to a temperature change of the USB port, wherein the controller is configured to detect a value representative of the resistance of the thermistor and to change the power level provided to the USB port when the value representative of the resistance of the thermistor reaches a threshold, wherein the thermistor is disposed in series between a resistor of the voltage divider and ground.