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LDR kit (5528/5506/5516/5537/5539) (LDR kit)
This is low cost LDR (Light Dependent Resistor). Basically it is a light sensitive resistor, the resistance will decrease when the surface is expose to light. It is widely used to detect Day or Night, example in automatic car porch light.
Adjustable Photosensitive Sensor Module with Light Detection Board (photo adj sensor module)
This photosensitive sensor module operates effectively within a supply voltage range of DC 3.3-5V, making it suitable for various applications and systems requiring different power levels.