1. Problems caused by improper power supply:

01. Check if the power supply is working properly, and the indicator light is not lit. If it is not lit, please check if the power is connected.

02. Check whether the power cord of the lamp bead is connected to the positive and negative poles of the power supply. Is there any inversion? If any of the above problems exist, please connect them correctly.

2, LED lamp beads for voltage requirements:

The nominal 3V LED lamp beads, in fact, different colors have different requirements for current, yellow requires minimum current, followed by red, green, white, and blue. If the current is too large, the wick will burn.

With a 2.4V rechargeable battery, the yellow color is easily burnt, because even if the voltage is not large, the current is too large, and it will burn at will.

When using the button battery, because the button battery voltage is 3V, but because the button battery discharge current is very small, the 3V LED lamp bead will not be burned. Therefore, when using LED lamp beads, you should choose the right power supply, pay attention to voltage, and current.

When using the power supply, if it does not meet the LED0603 lamp bead rating requirements, you need to improve the circuit, the common installation of resistors!

3. How to divide the LED color of the LED lamp beads:

In the case of no power supply, if you want to pick it up at the time of purchase, it is recommended to have a 3V button battery. It is convenient to check the LED light when selecting it.

4. Reasons for burning high-power LED lamp beads:

01, two filaments above and below, our industry is called gold wire, pure gold, for conductive, two positive, two negative, really good product will have a fifth line, welded on the Zener tube, from Protective

02, the filament is short, it has been very clear to tell you that your lamp has been burned by a large current, which is equivalent to breaking the road.

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

04. Generally, the aluminum substrates of three 1W lamps are driven by about 12V. Rarely use 220V directly. Do you see if there is a constant current source or a 12V drive power?

5, LED lamp beads yellow reason:

The reason for the yellowing of the LED outer sealant is mostly due to the mismatch between the epoxy resin and the curing agent, but it cannot be ruled out that the outer sealant is baked for too long.

Solution: Purchase a complete set of outer sealant and curing agent. For example, Shanghai Fine Chemical's model 800 or 2339 glue will not appear as follows. Pay attention to production control, strictly follow the operation instructions, avoid excessive or insufficient baking time. This situation is very well controlled.

6, LED lamp bead leakage reasons:

The equipment of the machine is not grounded, and the personnel are not wearing an electrostatic wristband (must be corded). Improper electrostatic protection. Then, in the packaging process, the welding line PAD is biased, and finally the quality problem of the chip itself.

7, LED lamp beads should be the problem of capacitive and inductive loads:

In fact, neither is LED lamp bead is a diode, it needs a positive turn-on voltage to work, usually 2-3.5V, in addition, the current size can control the brightness of the LED lamp bead. That is to say, LED lamp beads only convert electrical energy into light energy.

8, LED lamp pearl light decay reasons:

       One: The iron bracket has poor thermal conductivity.

Two: epoxy resin yellowing.

Three: The chip is not in close contact with the bracket.

Four: The chip has a large attenuation.