How to Use LED_GREEN: Examples, Pinouts, and Specs

The LED_GREEN is a green Light Emitting Diode (LED) manufactured by Custom. It emits green light when an electric current passes through it. This component is widely used as an indicator in various electronic circuits due to its low power consumption, long lifespan, and high visibility.

• Status Indicators: Used in electronic devices to indicate power status, operational status, or error conditions.
• Display Panels: Incorporated in display panels for visual signaling.
• Decorative Lighting: Used in decorative lighting applications due to its vibrant green color.
• Prototyping: Commonly used in breadboard and prototyping projects for visual feedback.

1. Identify the Leads: The longer lead is the anode (positive), and the shorter lead is the cathode (negative).
2. Connect to Power Source: Connect the anode to the positive terminal of the power source and the cathode to the negative terminal.
3. Use a Current-Limiting Resistor: To prevent damage, use a current-limiting resistor in series with the LED. Calculate the resistor value using Ohm's Law: [ R = \frac{V_{supply} - V_{forward}}{I_{forward}} ] For example, with a 5V supply and a forward voltage of 2.1V: [ R = \frac{5V - 2.1V}{20mA} = 145\Omega ] Use the nearest standard resistor value, which is 150Ω.

• Polarity: Ensure correct polarity when connecting the LED. Reversing the polarity can damage the LED.
• Current Limiting: Always use a current-limiting resistor to prevent excessive current flow.
• Heat Dissipation: Ensure adequate ventilation to prevent overheating, especially in high-power applications.
• Series and Parallel Configurations: When using multiple LEDs, consider the configuration (series or parallel) and adjust the resistor values accordingly.

// Example code to blink a green LED connected to pin 13 of Arduino UNO

const int ledPin = 13; // Pin number where the LED is connected

void setup() {
  pinMode(ledPin, OUTPUT); // Set the LED pin as an output
}

void loop() {
  digitalWrite(ledPin, HIGH); // Turn the LED on
  delay(1000); // Wait for 1 second
  digitalWrite(ledPin, LOW); // Turn the LED off
  delay(1000); // Wait for 1 second
}

1. LED Not Lighting Up:

   • Check Polarity: Ensure the anode and cathode are connected correctly.
   • Check Connections: Verify all connections are secure and correct.
   • Check Resistor: Ensure the current-limiting resistor is of the correct value and not open.

2. LED Flickering:

   • Power Supply Issues: Ensure a stable power supply.
   • Loose Connections: Check for any loose or intermittent connections.

3. LED Dim:

   • Insufficient Current: Ensure the current-limiting resistor is not too high.
   • Power Supply Voltage: Verify the power supply voltage is adequate.

• Multimeter Check: Use a multimeter to check the voltage across the LED and the current through the circuit.
• Component Testing: Test the LED and resistor individually to ensure they are functioning correctly.
• Breadboard Prototyping: Use a breadboard for initial testing to easily modify and troubleshoot the circuit.

By following this documentation, users can effectively utilize the LED_GREEN in their electronic projects, ensuring proper operation and longevity of the component.