Teach You How to Distinguish Infrared Transmitted Tubes and Infrared Receiving

The launch tubes of infrared LED lamp beads and the receiving tube of infrared LED lamp beads are called infrared LED lamp beads. The shape of the infrared LED lamp beads is similar to the ordinary round LED lamp bead. When you first contact the infrared LED lamp beads, it is difficult to distinguish the emitter of infrared LED lamp beads and the receiving tube of infrared LED lamp beads. R & D personnel stated that the judgment method can be used to distinguish: using a multimeter to measure identification to measure the polar resistance of the infrared LED lamp beads with a multimeter to determine whether it is infrared LED lamp beads. Determine 1: During the infrared LED lamp beads, the metering measurement is reduced under the condition of light irradiation, the forward resistance of the transmitted tube is small, the reverse resistance is large, and the black table pen is positive (long pins), the resistance is connected to the resistor, and the resistor Small (1K—20K) is the transmitting tube of infrared LED lamp beads. The large and reverse resistance is the receiving tube of infrared LED lamp beads. Judgment 2: When the black table is connected to the negative pole is the large resistance of the infrared LED lamp beads. When the resistance is small and the three -purpose meter pointer changes with the light and weakness of the light, the pointer is swinging the infrared LED lamp bead receiving tube. Power -powered test judgment of infrared LED lamp beads We can first use a LED lamp bead and—This resistance and the tested infrared LED lamp beads are connected in series, and the LED lamp bead is used to display the working status of the infrared tube tube. Use the remote control (DVD remote control, etc.) to press the any key of the remote control to the surveying tube. When the LED is bright, the tube is the receiving tube of infrared LED lamp beads. If it is not bright, it is the transmitting tube of the infrared LED lamp bead. Measure the working current of the working voltage of infrared LED lamp beads on the transmitter circuit, which can simply determine how its working performance. When measuring the working voltage at both ends of the tube, it is usually zero under static (that is, when the button is not pressed), and the dynamic (when you press a certain button) will jump to a smaller voltage value, because the encoding of the remote control system will be The structure of the method, the structure of the drive circuit and the voltage of the working power supply, the voltage value is usually between 0.1 and 0.85V. If the value is not too much or the difference is too much, you can determine that the infrared LED lamp beads work abnormal. The infrared LED lamp beads should be kept clean and intact, especially the spherical transmission part of the front end of the front end cannot exist pollutants such as dirt, nor frictional damage. The phenomenon of scattering directly affects the spread of infrared light. Light may reduce the sensitivity of remote control and reduce the control distance. In the process of working in the process of infrared LED lamp beads, their parameters must not exceed the limit. Therefore, when replacing the selection model, pay attention to the model and parameters of the original tube. In addition, you must not change the current of the infrared LED lamp beads at will. Because the range of infrared light wavelengths is quite wide, infrared LED lamp beads must be paired with infrared diode, otherwise it will affect the sensitivity of remote control and even cause out of control. Therefore, when replacing the selection type, be sure to pay attention to the wavelength parameters of the infrared light signal that radiated the infrared light. Infrared LED lamp beads have low hardness, and their high temperature resistance performance is worse. In order to avoid damage, the solder point should be far from the root of the pins, and the welding temperature should not be too high. The welding time should not be too long. It is best to use it. Metal gardenia pinch the root of the pins to help heat dissipation. The fixing of the pinwing switch should be completed before welding, and the tube and pin must not be stressed during the welding. Regarding the knowledge of infrared LED lamp beads, I will explain here today. After thinking about more LED lamp bead information, please continue to pay attention to Xiaobian. If you need LED lamp beads, you can contact our official customer service staff!