==Power Requirement==

==Power Requirement==

 

The Dragino HE is the core module of Yun Shield. The HE module requires around 200ma current when in full load, so it is powered by the Arduino <span CLASS=greentext>VIN</span> pins to avoid overheated in the Arduino onboard 5v LDO. So when Yun shield is in used, the Arduino board should be powered by DC port instead of USB port. The DC input can be <span CLASS=greentext>7v ~ 15v</span>.

The Dragino HE is the core module of Yun Shield. The HE module requires around 200ma current when in full load, so it is powered by the Arduino <span CLASS=greentext>VIN</span> pins to avoid overheated in the Arduino onboard 5v LDO. So when Yun shield is in used, the Arduino board should be powered by DC port instead of USB port. The DC input can be <span CLASS=greentext>7v ~ 15v</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>+7v 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>+7v DC</span>.