Crystal diode recognition method:

- Sep 17, 2015-

Diode identification is very simple, the N pole (negative), the diode surface is mostly used in a color ring, some of the diodes are also used to express P pole (Zheng Ji) or N pole (negative), there is a sign for the "P", "N" to determine the polarity of the diode. The positive and negative of the light-emitting diode can be identified by the length of the pin, and the pin is positive and the short foot is negative.

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