1. The problem caused by the abnormal power supply of the in-line LED lamp beads

①Check whether the power supply is working normally, and whether the indicator light is on. If it is not on, please check whether the power supply is connected well;

②Check whether the power cord of the lamp bead is well connected with the positive and negative poles of the power supply, and whether it is reversed. If there are any doubts above, please connect it accurately.

2. In-line LED lamp beads for voltage requirements

The nominal 3V LED lamp beads, in fact, different colors have different requirements for current, the request current is smaller, and the order is red, green, white and blue. Too much current will burn the wick. Using a 2.4V rechargeable battery, it is easy to burn, because even if the voltage is not large, but the current is too large, it will still burn at will. When the button battery is used, although the button battery voltage is 3V, the 3V LED lamp beads will not be burned due to the small discharge current of the button battery. Therefore, when using LED lamp beads, you should choose a suitable power supply, pay attention to the voltage and current. When choosing a power supply, if it does not meet the additional requirements of the LED lamp bead, the circuit needs to be improved, and it is common to add a resistor

3. How to split the luminous color of LED lamp beads

In the case of no power supply, if it is convenient to choose when purchasing, it is recommended to prepare a 3V button battery, which can be used to easily check what light the LED emits when choosing.

4. Factors that cause high-power in-line LED lamp beads to burn out

①The upper and lower filaments are called gold wires in the industry. Pure gold is used for electrical conduction. There are two positive poles and two negative poles. The products that are really good will have a fifth wire, which is welded to the Zener tube for protection. effect

②When the filament becomes shorter, it will clearly tell you that your lamp has been burned by a large current, which is equivalent to an open circuit.

③The driving current of high-power 1W is around 350ma, and the operating voltage is between 3.2-3.6V. Please pay attention when using it. Excessive current will definitely burn the lamp.

④Usually the aluminum substrates of the three 1W lamps are driven around 12V, and few of them are directly used at 220V. Do you think there is a lack of a constant current source or a 12V drive power supply?