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CJMCU RGB LED Module
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RGB LED modules can emit various colors of light. They are manufactured by packaging three LEDs of red, green, and blue into a transparent shell and have four pins. The three primary colors, red, green, and blue, can be blended and compose all kinds of colors by brightness, so you can make an RGB LED emit colorful light by controlling the circuit.
It need to be taken into consideration that not all colors are possible. Some colors are "outside" the triangle formed by the RGB LEDs.
This module has 4 pins, a GND, and 3 led color pins.
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