Photoresistor Module


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Photoresistor module useful for detecting the presence of light.

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The photoresistor is a passive circuit element whose resistance varies depending on the intensity of the light reaching it.

In general, photoresistors are low power and have resistances ranging from a few k Ω to light to resistors of the order of M Ω in the dark.

The module has two LEDs, one for power and the other for the output from the comparator. In this configuration, the circuit detects if the light exceeds a certain threshold.

Technical Specifications

    • Supply voltage: 3.3 V - 5 V;
    • Current: 15 mA;
    • Digital output, comparator LM393;
    • Potentiometer for adjusting the reference voltage.

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