PCB is also the ກະດານວົງຈອນພິມ, which is the support body of electronic components, and the capacitor on PCB must be clearly separated from the positive and negative when used. If it is connected backwards, it is very unsafe. Then how to separate the positive and negative capacitance on PCB board? The following xiaobian will introduce the positive and negative methods of capacitance on PCB board.

1. You can see the label on the white silver edge. If there is a “+” sign, it is a positive pole, and a character number is a negative pole.

There is a circle. The circle is divided into two halves. The black half is negative and the colorless half is positive.

3. If the capacitor is new, it can also be judged by the length of the pin. The side with the long foot is positive.

4. One end of the electrolytic capacitor hose is marked with the negative pole, and the other side does not represent the positive pole.

5. Look at the capacitor capacitor pin, the capacitor capacitor pin with a grid is a negative pole, the other is a positive pole.

6. Guide pin type electrolytic capacitor, the long side of the guide pin is positive, the long side of the guide pin is negative.

You can also measure the positive and negative poles with instruments.

In the circuit diagram of capacitor electrolysis, the electrolytic capacitor is identified by the letter C in the circuit, and a “+” is marked on the positive side. Capacitance symbol C, unit F (Farad).