RGB 5mm Common Cathode 4-Pin LED (Pack of 5 LED)

An RGB 5mm Common Cathode 4-Pin LED is a type of light-emitting diode that contains Red, Green, and Blue LED chips in one package. Here's a detailed explanation of what this means and how to use it:

Specifications

• Type: RGB LED (Red, Green, Blue)
• Package: 5mm round
• Pins: 4
• Configuration: Common Cathode (the negative terminal of all three LEDs is shared)
• Forward Voltage (typical):
• Red: ~2.0V
• Green: ~3.0V
• Blue: ~3.0V
• Forward Current (typical): 20mA per color

Pinout (Typical, Flat Side Facing You)

From left to right with the flat side facing you:

1. Red (R)
2. Common Cathode (–)
3. Green (G)
4. Blue (B)

How to Use It

To use the RGB LED:

1. Connect the common cathode pin to GND.
2. Connect each of the other three pins (R, G, B) to the positive supply via a current-limiting resistor.

• Resistor values depend on your power supply. For 5V, typical resistor values are:
• Red: ~150Ω
• Green/Blue: ~220Ω

1. Use PWM (Pulse Width Modulation) from a microcontroller (e.g., Arduino) to mix colors.

Example Arduino Hookup

int redPin = 9;
int greenPin = 10;
int bluePin = 11;

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  analogWrite(redPin, 255);   // Max brightness
  analogWrite(greenPin, 0);   // Off
  analogWrite(bluePin, 0);    // Off
  delay(1000);

  analogWrite(redPin, 0);
  analogWrite(greenPin, 255);
  delay(1000);

  analogWrite(bluePin, 255);
  delay(1000);
}

Origin: China

Brand:- King Light