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Arduino UNO USB Host Shield
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The UNO USB Host Shield compatible with Arduino is based on the MAX3421E, which is a USB peripheral/host controller containing the digital logic and analog circuitry necessary to implement a full-speed USB peripheral or a full-/low-speed host compliant to USB specification rev 2.0. For a successful communication to happen using USB host shield protocol, you need at least one of the device to be the host, which means that you cannot connect two keyboards together and expect them to communicate with each other.
| Shield Type | USB Host Shield |
| Compatible | UNO board compatible with Arrduino |
| Supports | HID devices, such as keyboards, mice, joysticks |
| Dimensions | 5 x 4 x 1 cms |
| Weight | 15 grams |
Keep in mind that the specifics of connecting a USB Host Shield to an Arduino board will depend on the specific version of the shield and the Arduino board you are using. Refer to the documentation provided with the shield and the Arduino software for more detailed instructions.