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2. PoweredUSB - Wikipedia

   en.wikipedia.org/wiki/PoweredUSB

   12 V and 24 V powered USB sockets, on an NCR cash register. PoweredUSB, also known as Retail USB, USB PlusPower, USB +Power, and USB Power Plus, [1] is an addition to the Universal Serial Bus standard that allows for higher-power devices to obtain power through their USB host instead of requiring an independent power supply or external AC adapter.

3. WEMO - Wikipedia

   en.wikipedia.org/wiki/WeMo

   The Wemo Insight Switch provides information on power usage and cost estimation for devices plugged into the switch. The Wemo Light Switch is for use where a light is controlled by a single light switch. Multi-way switching is not supported at this time but can be approximated by installing a Wemo Light Switch at each location.

4. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   To allow for voltage drops, the voltage at the host port, hub port, and device are specified to be at least 4.75 V, 4.4 V, and 4.35 V respectively by USB 2.0 for low-power devices, [a] but must be at least 4.75 V at all locations for high-power [b] devices (however, high-power devices are required to operate as a low-powered device so that they ...

5. USB hub - Wikipedia

   en.wikipedia.org/wiki/USB_hub

   Power equals voltage times current. A USB port that draws 500 mA (0.5 A) at 5 volts is drawing 2.5 watts of power. In Bus-powered USB hubs, each USB port can supply power as well as transfer data. A self-powered hub takes its power from an external power supply unit and can therefore provide full power (up to 500 mA) to every port. Self-powered ...

6. Boost converter - Wikipedia

   en.wikipedia.org/wiki/Boost_converter

   A boost converter or step-up converter is a DC-to-DC converter that increases voltage, while decreasing current, from its input to its output . It is a class of switched-mode power supply (SMPS) containing at least two semiconductors, a diode and a transistor , and at least one energy storage element: a capacitor , inductor , or the two in ...

7. USB-C - Wikipedia

   en.wikipedia.org/wiki/USB-C

   However, exactly three types of adapter with USB-C plugs are defined: 1. A Standard-A receptacle (for connecting a legacy device (such as a flash drive—not a cable) to a modern host, and supporting up to USB 3.1). 2. A Micro-B receptacle (for connecting a modern device to a legacy host, and supporting up to USB 2.0). [20] 3.