Light Sensors
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Light Sensitive Photo Resistor
$0.54A photo cell (also called a photo resistor, photo detector, CdS or photoconductive cell) allow you to detect light. Its resistance depends on the amount of light it is exposed to. These little sensors make great ambient light triggers (when light in the room turns on, do something).
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Photoresistor Light Sensor Module for Arduino
$3.24A photoresistor is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity; in other words, it exhibits photoconductivity. A photoresistor can be applied in light-sensitive detector circuits, and light-activated and dark-activated switching circuits
A photoresistor module makes it easy to use on breadboards and Arduino projects
