Photoresistor

usgb/ˈfoʊtəʊrɪˌstər/
noun

A photoresistor is a type of resistor whose resistance decreases with increasing incident light intensity.

The amount of light hitting the photoresistor directly affects its electrical resistance.
Visual representation of "photoresistor" - A photoresistor is a type of resistor whose resistance decreases with increasing incident light intensity.

Often appears as...

  • light sensor circuits
  • optical sensors

Usage tips

Neutral

light sensor, light-dependent resistor, variable resistor

Definition 1 of 1
Visual representation of "photoresistor"
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Functionality

A photoresistor's primary function is to detect light levels.

Illustration for Functionality
Photoresistors are crucial in automatic brightness adjustment in screens.
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Applications

They are commonly used in streetlights that turn on automatically at dusk.

Illustration for Applications
Many cameras use photoresistors to adjust exposure based on lighting.
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Sensitivity

The sensitivity of a photoresistor can vary based on the materials used.

Illustration for Sensitivity
Some photoresistors are more responsive to certain wavelengths of light.
Visual representation of the word "Photoresistor"

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