USB hubs enable you to attach multiple devices, such as printers, hard drives and card readers, to a single computer. However, the USB hub only makes the devices available to one computer at a time.

With so many connection ports in common, it's tempting to think that you can simply plug any printer into any computer, perhaps to save money. For a printer to work with a computer it needs two things ...

This circuit switches a printer’s USB connection from a PC to a laptop. What was needed was a method of allowing a laptop to use the printer occasionally while at all other times the printer would be ...