USB decoration

In addition, some lightweight devices (e.g., a small lamp on a gooseneck stalk) use the USB connector itself for mechanical support.

Today, USB-powered decorations are the most prominently seen examples, since the popularity of USB lets them operate on most modern computers.

This can interfere with the purposes for which the USB bus was designed, especially if the device suddenly attempts to draw the full 500 mA of power nominally available.

A newly connected device is supposed to then use the USB protocol to communicate a request for more DC power, if needed.

Nightlights, cooling fans, typing speedometers,[5] a beverage chiller,[6] and nodding dogs that guard internet connections[7] are all examples of USB semi-decorations.