Template: 13.3inch HDMI LCD H FAQ
From Waveshare Wiki
Answer:
This LCD gets power from two interfaces. One is the POWER port, you should connect a 12V/1A power adapter to this interface, the operating current of this interface is about 12V/0.6A. And the other one is the TOUCH interface. You need to connect this interface to the USB interface of the host, its operating current is about 5V/80mA.
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