Project 6: Ambient Light Sensor
(1)Description
There are four identical modules in this kit, the ambient light sensors, with
photoresistor as main component.
The resistance of a photoresistor varies with the light intensity. When there
is light around, its resistance ranges in 5-10KΩ; while when it is dark, the
resistance is only 0.2MΩ. Based on this property, a circuit can be built to
convert the change in resistance to changes in voltage.
What’s more, the sensor comes with an anti-reverse insertion terminal
with a pitch of 2.54mm to facilitate the wiring. It is also compatible with
many kinds of microcontrollers, such the Arduino microcontroller series.
Here, we apply this sensor with the Arduino microcontroller. The S (signal)
end of the sensor should be input to the analog pin of Arduino to detect
the variation in analog value which will be printed on the serial monitor.
And please notice that there are two positioning holes with a diameter of
4.9mm built on the sensor to help fix it.
(2)Parameters:
◆ Working voltage：3.3V-5V（DC）
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