Description :

1. With a Raspberry Pi light sensor (photoresistor/brightness sensor), it is very easy to determine a value, which can say, for example, if it is day, twilight or night.
2. In turn, projects could be implemented to control the (exterior) lights, which turn on automatically after a certain level of darkness. In this tutorial, we connect such a brightness sensor and read the light values accordingly, so that we can respond.
3. The photoresistor used is in addition to the actual version on a PCB (circuit board), whereupon et al. resistors are soldered. As a result, it is additionally possible to read out a digital signal which stands for “above/below the threshold value”. Reading this digital signal is very easy and will be covered in some other tutorials (for example here). Both versions can be used with this tutorial, only the one version just has an additional functionality. For projects like distinguishing between light/dark, it is certainly a simple alternative.
4. Light-dependent resistors or photoresistors are a staple of electronics. If you need a way to sense the level of ambient light then there is no easier way to do it. As the light on the sensor increases then the resistance across the two leads decreases. If you have a rear view mirror that darkens when its hit buy headlights you can check in the little hole on face of the mirror and you'll see those wavy lines of photoresistor!

Features :

• Condition: NEW, 100% Good Quality
• Maximum Voltage: 150 Volt DC
• The Max power consumption(mw):100
• Operating Temperature: -30 ~ +70 deg C
• Spectral Peak: 560nm
• Light Resistance  （10Lux）（KΩ）: 5-10
• Dark Resistance: （MΩ）: 0.8
• 100λ10：0.6
• Response time: 30ms (Rise), 30ms (Down)
• Resistance Illumination: 

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