AIHJCNELE 5pcs Photoresistor Sensor Module 4 Pin Digital Light Intensity Detection Board Photosensitive Resistive Light Control Switch LM393 AO DO Mete Output for Arduino with Cable Wire (4pins): Amazon.com: Industrial & Scientific
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4-pin Photoresistor Sensor Module Light Detection Sensor 4 Feet For Smart Car Accessories For Arduino - Integrated Circuits - AliExpress
Activity Guide for SparkFun Tinker Kit - SparkFun Learn
Solved Challenge #4: Photoresistor and LED Photoresistor: A | Chegg.com