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Photoresistors
So far, a huge breakthrough in the world of electronics has been the discovery of the electrical properties of semiconductor materials. These are mostly crystalline materials, the conductivity of which (electrical conductivity) can be changed in a wide range by introducing impurities, changing the temperature or changing the intensity of light falling on the semiconductor.
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Photoresistors - FAQ
A photoresistor is a passive electronic element whose resistance changes with changes in light intensity. These types of elements are used, for example, in building automation control systems depending on the time of day (including blinds or lighting).
You can check the operation of a photoresistor using a resistance meter .
The resistance in a photoresistor depends on the intensity of light falling on its surface. The stronger the light, the lower the electrical resistance value within the component.
When the surface of the photoresistor is illuminated, its resistance value, i.e. electrical resistance, changes - the resistance decreases as the light intensity increases.