Photoresistor module sensor LDR

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  • Description


  • using sensitive type photosensitive resistance sensor
  • the comparator output signal clean, good waveform, driving ability, more than 15mA.
  • with adjustable potentiometer detects the light intensity can be adjusted
  • the working voltage 3.3V-5V
  • the output form: DO digital switching output (0 and 1) and AO analog voltage output
  • a fixed bolt hole for easy installation
  • the small PCB board size: 3.2 cm x 1.4cm
  • using a wide voltage LM393 comparator


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  • photoresistor module most sensitive to ambient light, generally used to detect the brightness of ambient light, triggers microcontroller or relay modules and so on;
  • when the ambient light module brightness of less than the set threshold, DO-side output high, when the external ambient light brightness exceeds a set threshold, DO terminal output low;
  • DO output can be with the microcontroller directly connected, through the microcontroller to detect high and low, thereby detecting the light intensity changes in the environment;
  • DO outputs can directly drive a relay module shop, which can form a light control switch.
  • small plates can be connected to analog output AO and AD module, through AD conversion, you can get a more accurate ambient light intensity value;