4 ways to judge led chips damaged or not with a simple method

4 ways to judge led chips damaged or not with a simple method

4 ways:

1. Observe with the naked eye, if the LED lamp bead is burnt on the outside, or the chip inside is black, it means that the LED lamp bead is physically damaged.

2. If you have dry batteries on hand, you can use 2 1.5V batteries: connect them in series to form 3V, and connect them forward and reverse. If they do not light up, they are broken.

3. Multimeter measurement method.

a. Use the red pen of the multimeter to connect the positive contact point of the LED lamp bead, and the black pen of the multimeter to connect the negative contact point. When the LED lamp bead is slightly bright, it is good, otherwise it may be broken.

b. With a digital multimeter, use the diode measuring block to measure the positive and negative poles of the LED lamp bead on and off. If you use a pointer multimeter, use the 10KΩ range to measure, and you can intuitively see the LED lamp bead slightly bright when it is turned on. Good LED lamp beads.

4. LED test pen. If it is used in maintenance or selection, you can buy one from the almighty X treasure, the price is not expensive, dozens of yuan, and the use is very simple.

In general

There are 4 ways to judge the quality of LED lamp beads with simple methods. It is not complicated to operate. As for which method you choose, it depends on your choice.

This tester can test the voltage under different currents, and it is also one of the very convenient testing instruments.