Rainbow Color using RGB with Arduino #arduinoproject #arduino #electronics #project

Before we get into the Arduino RGB LED configuration, wiring, etc. Let’s first go over the basics of the RGB LED itself. The RGB LED consists of 3 LEDs in one. A red, a green, and a blue LED all in the same housing with separate leads for each. This allows the LED to mix colors at different intensities, allowing the presentation of many thousands of colors. There are 4-1 RGB LEDs that include a white LED. Though those are rarer, they work the same way.
There are two type of RGB LEDs you will encounter and they are wired very differently

Common Anode (+) – This type of LED has four pins. A cathode (-) for each color and a shared anode (+). The LED shares a common 3.3V to 5V input voltage. Grounding each anode will light the different colors.
Common Cathode (-) – This type of LED has four pins. An anode (+) for each color and shared cathode (-). The LED shares a common ground, apply 3.3V to 5V to each Anode will light the different colors. This is the most common RGB LED.
Red PWM = 255 (100%)
Green PWM = 0 (0%)
Blue PWM = 255 (100%)
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