How to Use Modulo Led 2 Colores 5mm : Examples, Pinouts, and Specs

The Modulo Led 2 Colores 5mm (KY-011), manufactured by Keys, is a dual-color LED module designed for use in a variety of electronic projects. This module features a 5mm LED capable of emitting two distinct colors, typically red and green, depending on the applied voltage and polarity. It is commonly used as a visual indicator in circuits, providing status updates, alerts, or other signals.

• Status indicators in electronic devices
• Signal lights in DIY projects
• Visual feedback in Arduino-based systems
• Educational and prototyping purposes

The following table outlines the key technical details of the KY-011 module:

The KY-011 module has a 3-pin header for easy connection. The pinout is as follows:

1. Connect the Pins:

   • Connect the GND pin of the module to the ground of your power supply or microcontroller.
   • Connect Signal 1 to a digital output pin of your microcontroller to control the red LED.
   • Connect Signal 2 to another digital output pin to control the green LED.

2. Power Requirements:

   • Ensure the operating voltage does not exceed the specified limits (2.0V for red, 3.0V for green).
   • Use current-limiting resistors (typically 220Ω to 330Ω) in series with the signal pins to prevent damage to the LEDs.

3. Control Logic:

   • Set the corresponding signal pin HIGH to turn on the desired LED color.
   • Both LEDs can be turned on simultaneously to produce a mixed color (e.g., yellow).

Below is an example of how to use the KY-011 module with an Arduino UNO:

// Define the pins connected to the KY-011 module
const int redPin = 8;   // Pin controlling the red LED
const int greenPin = 9; // Pin controlling the green LED

void setup() {
  // Set the LED pins as outputs
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
}

void loop() {
  // Turn on the red LED
  digitalWrite(redPin, HIGH);
  digitalWrite(greenPin, LOW);
  delay(1000); // Keep red LED on for 1 second

  // Turn on the green LED
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, HIGH);
  delay(1000); // Keep green LED on for 1 second

  // Turn on both LEDs to produce yellow
  digitalWrite(redPin, HIGH);
  digitalWrite(greenPin, HIGH);
  delay(1000); // Keep both LEDs on for 1 second

  // Turn off both LEDs
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  delay(1000); // Keep LEDs off for 1 second
}

• Always use appropriate current-limiting resistors to protect the LEDs.
• Avoid exceeding the maximum forward current (20mA) to prevent damage.
• Ensure proper grounding to avoid erratic behavior.

1. LEDs Do Not Light Up:

   • Verify the connections to the signal and ground pins.
   • Check if the current-limiting resistors are properly connected.
   • Ensure the microcontroller pins are set as outputs and are providing the correct voltage.

2. Only One Color Lights Up:

   • Confirm that both signal pins are connected to the microcontroller.
   • Test the module with a multimeter to ensure both LEDs are functional.

3. LEDs Are Dim:

   • Check the value of the current-limiting resistors. Resistors with too high a value can reduce brightness.
   • Ensure the power supply voltage is sufficient.

4. Mixed Colors Are Not Achieved:

   • Verify that both signal pins are set HIGH simultaneously.
   • Ensure the LEDs are not damaged or improperly connected.

Q: Can I use the KY-011 module without a microcontroller?
A: Yes, you can connect the signal pins to a power source (with resistors) to manually control the LEDs.

Q: What happens if I reverse the polarity?
A: The LEDs will not light up, but no damage will occur as long as the voltage is within safe limits.

Q: Can I use PWM to control brightness?
A: Yes, you can use PWM (Pulse Width Modulation) on the signal pins to adjust the brightness of the LEDs.

This concludes the documentation for the Modulo Led 2 Colores 5mm (KY-011).