The shape of the flashing LED lamp bead is no different from that of the general LED lamp bead, but it is composed of an integrated circuit (IC) connected with an LED lamp bead in the tube shell. The integrated circuit is composed of an oscillator, a frequency divider and a buffer driver; The oscillator generates a signal with an oscillation frequency of fo. After multi-stage frequency division, a fixed frequency fBL in the range of 1.3 - 5.2Hz can be obtained, and then the current is expanded by the buffer drive circuit to output a large enough current to make the LED The lamp beads flicker.

Flashing LED lamp beads are widely used in light alarm circuits, holiday lights, various electronic toys, electronic corsages and vehicle turn indicators.

The flickering LED lamp beads should pay attention to the following matters when using:

1. Blinking LED lamp beads generally use a working voltage of 5V.

2. The working voltage of the flashing LED lamp bead should not exceed the specified value of the rated voltage, otherwise the device will be easily damaged. The voltage should not be too low, otherwise the light will be dim.

3. Blinking LED lamp beads identify the positive and negative poles, do not connect them in reverse. Generally, the long leg is the positive electrode, and the short leg is the negative electrode.

4. The device orientation of the flashing LED should not be close to the heating components.

5. The welding temperature should not be too high when welding the flashing LED lamp beads. Generally, a soldering iron with a power of less than 30W can be used for welding. The welding time should not be too long, and the general welding time is 3s.

6. Pay attention to the flashing LED lamp bead equipment, the pins of the tube should not be stressed, the root of the lead should not be bent, and the welding point should be away from the root of the tube, generally larger than 15mm.