1. Questions for the abnormal power supply of LED lamp beads for the abnormal power supply of LED lamp beads ① Check whether the power supply power supply has normal operations and whether the indicator light is on. If it is not turned on, please check if the power supply is connected; ② View the lamp beads Is the power cord connecting the positive and negative pole of the power supply power supply? Is there any reverse? If there are above questions, please be able to connect accurately. 2. Directly inserted LED lamp beads about the voltage of LED lamp beads. In fact, different colors also have different requirements for currents. The current begging current is small, and it is red, green, white and blue. If the current is too large, the core will be burnt. Use a 2.4V charging battery to burn, because even if the voltage is not large, the current is too large, and it will still be burnt at will. At the time of using a button battery, although the voltage of the button battery is 3V, because the discharge current of the buttons is very small, the 3V LED lamp beads will not be burned. Therefore, when using LED lamp beads, you should choose a suitable power supply, pay attention to voltage, and current. When the power supply is selected, if it does not meet the additional request of the LED lamp bead, the need for improvement of the circuit and the common installation resistance. 3. How to insert the luminous color of the LED lamp beads into the light and incompatible situation of the braid, if in order to choose a bento in order to choose, you advocate a 3V button battery. What light.