Is the strip led lights wiring divided into positive and negative poles?
The led lamp has positive and negative poles.
The method for distinguishing the positive and negative poles of the three-wire led light band is as follows:
1. Use a digital multimeter, select the diode range, and contact both ends of the led with black and red probes. When the led is lit, the red probe contacts the positive pole and the other end is the negative pole. The naked eye can see that there are two poles, the very narrow one is the positive pole and the wide one is the negative pole. Generally speaking, the side of the negative pole touched by hand is flat, and the side of the positive pole is curved.
Is the strip led lights wiring divided into positive and negative poles?
2. The newly bought LED has no leg cut, and the long leg is the positive pole.
3. Generally, LED lights are used by novices to see the missing corner. One side of the missing corner is the negative pole, and the other side is the positive pole.
4. Use the diode range or resistance range of the multimeter. If it is on, connect the red probe to the LED positive pole.
5. Connect the LED with a 1.5V battery. If it is on, the battery is directly connected to the LED positive pole.
Is the strip led lights wiring divided into positive and negative poles?
6. Look at the color. The red arrow refers to the negative pole, most of which are negative poles. For example, the battery has a large negative area, and the positive electrode is only a point; Automobile electrical appliances, the negative pole is installed on the vehicle body, and the positive pole goes to each place separately. So the big part is the negative pole.
7. If it is a colored lamp, the three colors are the same pole, usually the positive pole. It is a very simple way to distinguish whether there is a black line as the ground wire.