# Rgb Led Circuit Diagram

## RGB LED Circuit Diagram

An RGB LED circuit diagram is a schematic representation of the electrical components and connections required to power and control an RGB LED. RGB LEDs are used in a variety of applications, including lighting, signage, and displays. The circuit diagram below shows a basic RGB LED circuit that can be used to drive an RGB LED from a microcontroller.

### Figure 1: RGB LED Circuit Diagram

The circuit diagram consists of the following components:

• A power supply (5V)
• A resistor (100Ω)
• A microcontroller (Arduino Uno)
• Three RGB LEDs
• Three 220Ω resistors

The power supply provides the voltage (5V) required to power the RGB LEDs. The resistor limits the current flowing through the LEDs to prevent them from overheating. The microcontroller is used to control the brightness of each LED individually. The RGB LEDs are connected in parallel to the microcontroller. The 220Ω resistors are used to limit the current flowing through each LED.

To build the circuit, you will need to connect the components as shown in the circuit diagram. The power supply should be connected to the positive and negative terminals of the microcontroller. The resistor should be connected between the positive terminal of the microcontroller and the positive terminal of the RGB LEDs. The RGB LEDs should be connected between the negative terminal of the microcontroller and the negative terminal of the resistor. The 220Ω resistors should be connected between each of the RGB LEDs and the ground terminal of the microcontroller.

Once the circuit is built, you can upload the following code to the microcontroller to control the brightness of the RGB LEDs.

``` #include // Define the pins for the RGB LEDs const int redPin = 9; const int greenPin = 10; const int bluePin = 11; // Define the variables for the RGB LED colors int redValue = 0; int greenValue = 0; int blueValue = 0; void setup() { // Set the pins for the RGB LEDs as outputs pinMode(redPin, OUTPUT); pinMode(greenPin, OUTPUT); pinMode(bluePin, OUTPUT); } void loop() { // Set the brightness of the RGB LEDs analogWrite(redPin, redValue); analogWrite(greenPin, greenValue); analogWrite(bluePin, blueValue); // Increase the brightness of the LEDs by 10 each time the loop runs redValue += 10; greenValue += 10; blueValue += 10; // Check if the brightness of the LEDs has reached 255 if (redValue >= 255) { redValue = 0; } if (greenValue >= 255) { greenValue = 0; } if (blueValue >= 255) { blueValue = 0; } // Wait for 10 milliseconds before running the loop again delay(10); } ```

When you run the code, the RGB LEDs will gradually increase in brightness from off to full brightness. You can change the colors of the LEDs by changing the values of the redValue, greenValue, and blueValue variables.

## Conclusion RGB LED circuits are relatively simple to build and can be used in a variety of applications. By following the circuit diagram and code provided in this article, you can create your own RGB LED projects.

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