The USB Host Shield contains all of the digital logic and analog circuitry necessary to implement a full-speed USB peripheral/host controller with your Arduino. This means you could use your Arduino to interface with and control any USB slave device - thumbdrives, digital cameras, bluetooth dongles, and much more!

This shield uses the MAX3421E chip that is popular on many USB Host Shields for Arduino.

Datasheet for Shield

Datasheet for MAX3421E

Schematic

Demo Code (Library)