Portable consumer products increasingly rely on the USB port as a dc power port. The ubiquitous port obviates the need for designers to use that annoying external-power-supply “wall wart” to charge a ...

A portable USB hard drive is a great way to back up data but what if your USB ports are unable to supply enough “juice” to power the drive? A modified version of the Silicon Chip Usb Power Injector is ...

[Andrew] was getting some poor performance from a couple of USB devices he had connected through an unpowered hub. This is a problem because the hub prevents devices from negotiating with the host ...

A power supply for electronic devices. Also called an "AC adapter" or "charger," power adapters plug into a wall outlet and convert AC to a single DC voltage. Computers use multiple DC voltages, and ...