You can change the terminal and check whether you have common anode. If your LED glows then it will be common cathode type. So you need to place the Black Wire of the multimeter to the longest lead and place the Red wire to the other terminals one by one. In the RGB LED, the longest pin will be the common terminal (in comm0n cathode LED the longest pin is an Cathode, similarly for the common Anode). In the multimeter, rotate the knob to Diode testing mode (Diode Symbol mentioned). Normal 5mm and 3mm types of white LEDs have two lead terminals, assigned as the cathode and the anode, or in layman’s words, a positive and a negative. You can use a multimeter to find out as well as the LED Colors pins too. How to check the type of RGB LED with multimeter? In a Common Cathode RGB LED, all three LEDs share a negative connection (Cathode). For a white light, you’d set all three LEDs to the highest intensity. Real energy-saving, could achieve about 75% of energy efficiency.With an RGB LED you can, of course, produce red, green, and blue light, and by configuring the intensity of each LED, you can produce other colors as well.įor example, to produce purely blue light, you’d set the blue LED to the highest intensity and the green and red LEDs to the lowest intensity.It could be under the test of the highest temperature like 130℃, and it could also work without a problem under 3 meters of water. This would bring a low forward voltage drop and small conduction resistance. High-grade waterproof (IP68 grade), dust-proof, anticorrosion, UV resistance, V0 fireproofing grade. The current would get to the IC cathode from the LED lamps.Strong heat dissipation, low power loss, low heat, long life span.This could meet the standard of export to EU countries and the USA. ▶ For the aluminum base, it has the function of anti-electromagnetic interference and anti-radiation. For this common cathode LED screen with aluminum bases with the same panel size, it is about 29 kg. For example, for a common anode LED screen with 960x960mm LED panel size, the weight is about 34 kg. As it is die-casting aluminum made, the flatness of the whole LED screen would be much better. This aluminum base would be the cooling fan for LED lamps and drive ICs. The heat on PCB would be transferred according to the aluminum base. ▶ The aluminum base of LED modules is adopted. Why the Heat of Common Cathode LED Display is Much Less?įrom the introduction of the common anode and common cathode supplying power, we could know the power used for a common cathode LED screen would be much lower than that of a common anode LED screen (regular LED screen), and the heat of the former would be much less than that of the latter. This makes little power loss and the heat is much less during the operation of an LED screen. Buy the newest LED 3mm Dual Color Red / Green Common Cathode 5PCS products in Philippines with the latest promotions Find cheap offers Browse our wide. For common cathode LED display, it is to supply power separately based on the voltage needed of red, green, blue LED lamps (it is about 2.5V for the red LED, while it is 3.8V for blue and green LEDs). As a result, this could cause a big power loss. ☛ Common anode LED display distributes a voltage more than 3.8V (5V for instance) to red, green, blue LED lamps to supply power together. For a common cathode LED display, just as mentioned above, it could make a low forward voltage drop. ☛ Common anode LED display current would get to the LED lamps from the PCB board and RGB LED lamps would supply power together, which could make a higher forward voltage drop. The current would get to the IC cathode from the LED lamps. This could distribute voltage and current to the red, green, blue LED lamps precisely. Common cathode means to supply electricity with the common cathode, which supplies power for red, green, blue separately. How could it be so excellent?įirst, we need to know what is the common cathode LED display. This method could save about 75% of energy. Recently, the power supply technology of the common cathode LED display has attracted much attention.
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