How to Determine the Positive and Negative Poles of a Diode in a Circuit

How to Determine the Positive and Negative Poles of a Diode in a Circuit

Diode are very common and important electronic components that are used in the production of many electronic products. When installing, using, or repairing electronic products, it is necessary to distinguish the positive and negative poles of diodes. This is a necessary knowledge for technical personnel. In order to help people better judge its positive and negative poles, professional personnel have compiled some mnemonics, which will be much easier to remember and operate in practice, It is also easy to determine its positive and negative poles.

A Diode has two poles, one anode and one cathode. Distinguishing polarity is relatively simple, first you can refer to the diagram. One end of the triangle is extremely negative, and the other end of the short bar is positive. There is no chart to see the appearance, and the rounded end is the anode. Larger specifications with screws, with one end of the screw being anode. If you are not confident in using a meter, prepare a multimeter. Multiply by one hundred resistance levels, and connect the two pens to the electrodes separately. Compare the resistance values twice, one big and one small, and remember carefully. When the resistance is low, check the pen and set the electrode with red positive and black negative. These are all tips to remember about diodes and are also effective ways to determine their positive and negative poles.

When judging the positive and negative poles of a Diode, it is important to know that the main characteristic of the diode is forward conduction and reverse cutoff. Therefore, when judging its positive and negative poles, it is important to look at the light-emitting diode. Both ends are connected to the positive and negative poles of the battery. If the quantity indicates that the positive pole of the battery is also the positive pole of the Diode. If the light bulb is not lit, it indicates that the negative pole of the battery is also the negative pole of the diode. In a DC circuit, the direction of current flows from high to low, which means it flows from the positive pole to the negative pole through the circuit. You can determine the positive and negative poles of the diode based on its characteristics.

The positive and negative poles of a diode can also be tested using a regular pointer multimeter. If the red pen on the meter is connected to the positive pole of the diode and the black pen is connected to its negative pole, the number represented above should be between 0.3 and 0.7. If the black pen is connected to the positive pole of the diode and the red pen is connected to its negative pole, the value displayed on the meter should be 1. The pin diode can also determine its positive and negative poles based on the length of the pin, with the long end being the positive pole and the short end being the negative pole. The SMD Diode can be determined by the symbol above, with the positive pole indicating a plus sign and the negative pole indicating a minus sign. The above are all methods for judging the positive and negative poles of diodes, combined with the diode's pithy formula, which can help everyone master more relevant knowledge and make correct judgments on the positive and negative poles of Diodes when needed.