Why use resistors with leds - Why do I need a resistor when using LEDs on an Uno?

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Why do we use resistors? [The real quick reasons]

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Why do I need a resistor when using LEDs on an Uno?

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Basics: Picking Resistors for LEDs

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Why is it necessary to use a resistor in series with an LED?

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Why do I need a resistor when using LEDs on an Uno?

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Resistors with LED strip

Like the manual shows, I have some resistors before the LEDs and everything works fine.

  • The high current would destroy the pn-gate.

But if your device resistance does change with mentioned parameters then you need a current limiting resistor, to limit the current, to prevent your device from burning.

  • The LED strip is connected directly to the Arduino and‱ Specialized types like high power LEDs may have somewhat different characteristics and requirements.




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