+1 vote
by Epic (640 points)
I'm building a simple circuit with an LED, and someone mentioned I need a resistor to control the brightness. How does this work?

1 Answer

0 votes
by Mythic (1.6k points)

Yes, resistors can significantly affect the brightness of an LED in a circuit. The brightness of an LED is primarily determined by the current flowing through it, and resistors are used to control this current.

  • Higher Resistance: A higher resistance value will reduce the current through the LED, making it dimmer.
  • Lower Resistance: A lower resistance value will increase the current through the LED, making it brighter. However, be careful not to go too low, as excessive current can overheat and damage the LED.
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