The USB Host of Yun Shield gets power from the Arduino <span CLASS=greentext>+5v</span> pin, since the +5v from Arduino comes from the +5V LDO, to avoid overheated on the Arduino Board, when the USB host is in used, it is recommended to use <span CLASS=greentext>+9v DC</span>. | The USB Host of Yun Shield gets power from the Arduino <span CLASS=greentext>+5v</span> pin, since the +5v from Arduino comes from the +5V LDO, to avoid overheated on the Arduino Board, when the USB host is in used, it is recommended to use <span CLASS=greentext>+9v DC</span>. |