[1] [2] [3] [4] http://www.sunfounder.com/wiki/index.php?title=File:AMS1117.pdf http://www.sunfounder.com/wiki/index.php?title=File:USB_3.1_C_TYPE.pdf http://www.sunfounder.com/wiki/index.php?title=File:SunFounder_MARS_Schematic.pdf
