How do you make the USB interface your power source?
This upstairs doesn't seem to have a -5V line, does it? If so, the difference is 10V...... And USB chip pressure value should be 5V? The line is correct, but is the voltage wrong?......
Find the red and black lines in the USB line. They represent the +5V and the ground wire, and then connect them to the positive and negative poles of the device you want to power. The red line is positive and the black line is the negative. The red line provides the +5V voltage, and the black line corresponds to the zero line of the alternating current.
USB can be used as a power supply interface, the interface of the two sides of the two terminals is + - power, in the formal product of the USB connecting line, red side, black is the ground voltage is 5V, unity, the middle two root is white and green and data lines, without it, there is a common computer before the maximum current the USB interface on the panel is the basic 0.5A, behind may be larger, some mobile phone charger is the USB interface, but also can make the current power supply, can according to the label to use.
