From the course: Electronics Foundations: Fundamentals

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Challenge: Limit current to an LED

Challenge: Limit current to an LED

From the course: Electronics Foundations: Fundamentals

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Challenge: Limit current to an LED

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(upbeat music) - [Narrator] All right, folks, it's time for a challenge problem. This is your chance to practice using ohms law. For this challenge, I want you to use ohms law to determine an appropriate resistance value for the resistor in this circuit to limit the amount of current that goes through a light emitting diode or LED. This is a very common task when working with hobbyist electronics. In LED is a special type of electrical component that emits light when current flows through it, working with LEDs can be a bit tricky, because they're an electrical component that does not follow ohms law like resistors do. You cannot treat an LED like a resistor when designing a circuit. The details about how an LED works are beyond the scope of this course, but for this exercise, you'll need to know three things about it. In this circuit, the LED will have a very tiny resistance to the current passing through…

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