Simple and practical USB socket polarity detector ----- USB PIN DETECTOR

Simple and practical USB socket polarity detector, USB PIN Detector Keywords: simple and practical USB socket polarity detector The polarity of the USB plug is shown in Figure 1, red, white, green, and black leads represent + 5V power supply, data line negative, data line positive and ground. If the data line is positive and negative, up to the USB device does not recognize or use it normally, but once the + 5V power cord is connected to other locations, it may cause the USB device or interface circuit damage. The principle of this USB socket polarity detector is shown in Figure 2, which is the detection of whether the positive and negative electrode of the USB socket is correct. The USB plug can be used for the ready-made USB extension line, and the three components in the figure and the USB extended the red, the black core wire is welded to a small bread plate, and then secure the root of the core wire with the hot melt adhesive. Simple and practical USB socket polarity detectors are made. Insert the USB plug on the front USB outlet to be detected, if the green light is on, the power polar connection is correct, can be safely inserted into the USB device;, if the red light is on, the power supply is positive and negative, be sure Adjust the front USB connection, to the green light of the detector can insert the USB device; if the red, the green light is not lit, the at least one power cord is connected to the data cable, and it is also necessary to adjust the connection as above. If the green light is on, inserting a USB device is not properly identified or used, it is likely that the positive and negative of the data line is reversed, and the green, white USB cable is swapped.

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