What Happens When an LED Is Directly Connected to a Power Supply?

Learn why connecting an LED directly to a power supply can damage it and how to use resistors to protect your LED safely.

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When an LED is directly connected to a power supply, it can burn out. LEDs need a current-limiting resistor to prevent too much current from flowing through them. Use a resistor in series with the LED to ensure it operates safely and efficiently.

FAQs & Answers

  1. Why should I use a resistor with an LED? A resistor limits the current flowing through the LED, preventing it from drawing too much power and burning out.
  2. What happens if an LED is connected directly to a power supply without a resistor? The LED can draw excessive current, which usually causes it to overheat and burn out quickly.
  3. How do I choose the right resistor for an LED? Calculate the resistor value based on the LED's voltage and current ratings using Ohm's law to ensure safe operation.

Watch More

For more detailed guidance on safely powering LEDs and other electronic components, explore our tutorials on resistor calculations, LED circuit design, and beginner electronics projects.

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