Why you need a series resistor when driving an LED

Why do you need a series resistor? What is the correct series resistance to use when driving an LED? These are frequently asked questions. One possible answer is: You do not need a series resistor. The proper answer is: A series resistor is required to limit the current through the LED and prevents destroying the LED. In this tutorial you will learn in what circumstances a series resistor is not necessary. You will also learn when you should use a series resistor and how to calculate the...

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