What is a LED emission tube and how to detect it?
The LED light emitting tube is composed of a plurality of light-emitting diodes. It is mostly used for audio level indication of radio and sound equipment. The display bits of LED light emitting tubes are generally divided into 5 bits, 6 bits, 7 bits and 10 bits. The structure can be divided into two types, one is that each light emitting diode is independently installed on the display bracket and the other is a common electrode. The display is made up of common anode or common cathode, and the anode or cathode of the light emitting diode is connected together in the display, and then the tube is elicited.
Detect the LED emission tube
The use of multimeter to detect LED luminous platoon is mainly to check whether the LEDs are good. May be based on its structure is tested by different methods.
(1) the vertical LED emission tube is placed in the vertical and reverse measurements of the multimeter in the RX10kΩ gear. When the light emitting, the red pen is connected to the negative pole of the one pole, the black pen is connected to the positive pole of the one pole, and the multimeter pointer should swing greatly; the reverse resistance should be infinity when no light is light. Which one does not shine for which is bad. It can also be detected directly by battery. That is to say, using 3V battery string only a small resistance, we should see the luminescence when measuring.
(2) detection of common electrode LED light emitting tube for detecting common electrode LED luminous platoon is basically the same as that of detection and separation. For the common cathode, the cathode is connected to the cathode with the red pen, and the anode pins are measured sequentially. When normal, each tube should shine. The common anode is opposite. If there is no light, it can be judged to be a damaged part. For some dissimilar monitors with pin polarity, the above method can also be used to identify the structural type and the order of pins conveniently.
If you want to know more, our website has product specifications for the LEDs, you can go to Allicdata Electronics Limited to get more information.