How to Use LED_RED: Examples, Pinouts, and Specs

The LED_RED is a red light-emitting diode (LED) manufactured by Custom. It emits red light when an electric current passes through it. This component is widely used as an indicator light in various electronic devices due to its low power consumption, long lifespan, and high visibility.

• Indicator Lights: Used in electronic devices to indicate power status, errors, or other conditions.
• Displays: Utilized in seven-segment displays and other visual indicators.
• Lighting: Employed in decorative lighting, signs, and other applications requiring red illumination.
• Arduino Projects: Frequently used in DIY electronics projects with microcontrollers like the Arduino UNO.

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 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; reversing the connections can damage the LED.
• Current Limiting: Always use a current-limiting resistor to prevent excessive current flow.
• Heat Management: While LEDs are efficient, they can still generate heat. Ensure adequate ventilation if used in high-density applications.

// Example code to blink an 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 is connected to the positive terminal and the cathode to the negative terminal.
   • Check Connections: Verify all connections are secure and correct.
   • Check Resistor: Ensure the current-limiting resistor is of the correct value and properly connected.

2. LED Flickering:

   • Power Supply Stability: Ensure the power supply is stable and not fluctuating.
   • Loose Connections: Check for any loose or intermittent connections.

3. LED Dim:

   • Insufficient Current: Ensure the current-limiting resistor is not too high, reducing the current below the required 20mA.
   • Power Supply Voltage: Verify the power supply voltage is adequate for the LED's forward voltage.

• Multimeter Testing: Use a multimeter to check the voltage across the LED and the current through the circuit.
• Breadboard Testing: Before soldering, test the circuit on a breadboard to ensure all components work correctly.
• Component Substitution: If the LED is not working, try replacing it with a known good LED to rule out component failure.

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