1. Problems caused by abnormal power supply:
01. Check whether the power supply is working normally, whether the instruction light is on, if not, please check whether the power supply is connected;
02. Check whether the power cord of the lamp bead is connected with the positive and negative poles of the power supply, and whether it is reversed. If the above problems exist, please connect them correctly.
2. LED lamp beads for voltage requirements:
Nominal 3V LED lamp beads, in fact, different colors have different requirements for current. Yellow requires the smallest current, which is red, green, white, and blue in order. Excessive current will scorch the wick.
Using a 2.4V rechargeable battery, the yellow color is easy to burn, because even if the voltage is not high, but the current is too large, it will still burn at will.
When using button batteries, because the button battery voltage is 3V, but because the button battery discharge current 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 the voltage and current.
When selecting the power supply, if it does not meet the rated requirements of the LED lamp beads, the circuit needs to be improved, and a common resistor is installed!
3. How to divide the luminous color of LED lamp beads:
If it is not powered on, 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 the LED emits when selecting.
4. Reasons for the burning of high-power LED lamp beads:
01. The upper and lower two filaments are called gold wires in our industry. Pure gold is used for conducting electricity. Two positive poles and two negative poles. A really good product will have a fifth wire, which is welded to the Zener tube. Protective
02. When the filament becomes shorter, it has already clearly told you that your lamp has been burned by a large current, which is equivalent to a circuit breaker.
03. The high-power 1W drive current 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 the three 1W lamps are driven by about 12V, and rarely use 220V directly. Can you see if there is a constant current source or a 12V driving power supply?
5. Reasons for the yellowing of LED lamp beads:
The yellowing of the LED outer sealant is mostly caused by the mismatch between the epoxy resin and the curing agent, but it cannot be ruled out that the outer sealant bake time is too long.
Solution: Purchase a complete set of external sealant and curing agent. For example, Shanghai Fine Chemical's model 800 or 2339 glue will not appear as follows. In addition, pay attention to production control and strictly follow the operation instructions to avoid excessive or insufficient baking time. , This situation is well controlled.
