![]() Pulse Width Modulation ( PWM) is a technique for generating a continuous HIGH/LOW alternating digital signal and programmatically controlling its pulse width and frequency. Before discussing how to use the PWM output pins, let’s first define what is the PWM technique and what are the properties of a PWM signal. Those pins are designated with a ( ~) mark next to the pin number on the board. By varying the duty cycle for each color input, we can get a desired specific color code as we’ll see hereafter in this tutorila.Īrduino boards have several PWM output pins usually. We use Arduino PWM output to control the RGB inputs for the 3 LEDs (Red, Green, and Blue). It’s better indicated in the figure below. The longest it the ground (common) pin, next to it is the Red LED input, and on the other side there are the Green and Blue inputs. ![]() Given that each LED can have 256 different levels of intensity, the combined RGB LED will therefore have (256 3 ≈ 16.77Million) unique colors.Īn RGB LED has typically 4 leads (pins). It can emit pure Red, Green, or Blue light each at the same time using a separate input lead and light emitting diode.īy varying the intensity of the light for each color LED, we can achieve millions of possible colors over the entire color spectrum. Without further ado, let’s get right into it! Table of ContentsĪn RGB LED is basically an electronic device that combines three LED elements in one package. ![]() You’ll learn how RGB LEDs work and how to interface Arduino With RGB LED to create color mixing and transition effects. In this tutorial, we’ll create a couple of Arduino RGB LED Control Projects using PWM (analog output).
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