In this configuration, the PWM signal must be applied at the cathode terminals to vary the intensity of each LED. These LEDs are interfaced to a controller such that the controller sinks current through them. In common-anode LED, all three LEDs have a common anode but have different cathodes. There are two types of RGB LEDs: Common-anode LED and Common-cathode RGB LED. If the pulse width of that signal at each LED is changed by 8-bit values, the intensity of light of each LED also changes by the same scale.Īpproximately 16 million different colors can be produced on an RBG LED. The intensity of each color-LED can be controlled by applying the PWM signal to them. This is why when these LEDs emit light, the light is not viewed individually but as an additive mix of three lights. In an RGB LED, three LEDs of red, green, and blue color are closely packaged. So, let’s suppose that the intensity of each color is altered on an 8-bit scale, which would equate to 16,777,216 colors (256 x 256 x 256) or approximately 16 million colors that could be produced. In a large outdoor DV LED display, each RGB LED works as a pixel.īy RGB LED, almost any color can be produced.
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