![]() analogWrite(pin, value) function is used to generate the PWM signal of a specific duty cycle where the value varies from 0 to 255 for 0 to 100% duty cycle (for example, 25% duty cycle: analogWrite(64), 100% duty cycle: analogWrite(255)).Īccording to this code, I have used the PWM pins 11, 9, and 6 for LED outputs. I have used the analogWrite() function to generate output that accepts values between 0 to 255. It measures in percentage and defines the voltage between 0 and 5 volts. The duty cycle specifies the duration for which the pulse is HIGH. ![]() Arduino Uno has six pins (3, 5, 6, 9, 10, and 11) to generate PWM signals of the specific duty cycle. PWM or pulse width modulation is the technique that is used to control the brightness of the LED, speed, and direction of different types of motors. I have preferred this circuit connection for both codes to make things easier for you to understand. The last pin of the RGB LED is also connected with the PWM pin 6 of the Arduino board along with the 1 K ohm resistor. The third pin of the RGB LED along with the 1 K ohm resistor is connected to the PWM pin 9 of the Arduino board. The second pin (common anode) of the RGB LED is connected to the 5-volt power supply pin of the Arduino board. Required components:Īs shown in the above circuit diagram, the first terminal of the RGB LED along with the 1 K ohm resistor is connected to the PWM pin 11 of the Arduino board. At the end of this article, you will be able to play with multiple colors generated by the RGB LED. In this article, I will explain to you how an RGB LED can be operated using the Arduino Uno using two very basic examples for the same circuit connection. You can understand the structure of common cathode-type RGB LED using the image illustrated below. In the common cathode type, RGB LED all three colored LEDs leg shares a (negative) cathode connection. You can understand the structure of common anode-type RGB LEDs using the image illustrated below. In the common anode type, RGB LED all three colored LEDs leg shares a (positive) anode connection. You can identify the type of the RGB LED by using the multimeter in continuity mode or by reading the component data sheet provided by the manufacturing company. The third one is for green-colored LED and the fourth one is for blue-colored LED. ![]() The RGB LED has four legs, the first one is for red-colored LED, and the second one is for common anode or common cathode. There are two types of RGB LED one is a common anode type and the other one is a common cathode type. Common anode and common cathode type RGB LED: Similarly, if you need to generate white color, you would set all three LEDs with the highest intensity. If you want to produce red color, you will set the red LED at the highest intensity along with the green and blue LED with minimal (zero) intensity. We can generate any color by adjusting the brightness of each of the three LEDs of the RGB LED. RGB LED looks just like a regular LED or we can say that an RGB LED has three LEDs (red, green, and blue colored LED) inside a single packaged LED with four legs. RGB LED is the most amazing type of LED that can create millions of different shades of light colors using red, green, and blue colors. RGB LED is the abbreviation of ‘’Red Green Blue Light Emitting Diode’’. ![]()
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