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Axiometa

Light Dependent Resistor

Light Dependent Resistor

AX22-0005

$2.49
$2.49
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This AX22-sized module houses a light-dependent resistor with a dark resistance of 100 kΩ – 200 kΩ on a 22 × 22 mm PCB, yielding an analog voltage that smoothly follows ambient brightness and is effortless for any microcontroller’s ADC to read. It slots straight into AX22 systems with no special wiring, enabling automatic daylight detection, adaptive backlight dimming, or simple light-triggered events in minutes. Ideal for smart lamps, environmental loggers, or interactive installations where responsive, light-aware behavior is essential.
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  • Technical Details

    - 22 mm × 22 mm square
    - 4× ⌀2.7 mm Mounting Holes
    - 100kΩ to 200kΩ
    - 1.8 V, 3.3 V, 5.0 V
    - Arduino IDE Compatible
    - MicroPython Compatible
    - MicroBlocks Compatible

  • Pinout

  • Compatibility

PCB Design

  • Top

  • Bottom

Arduino Example Code

example.ino 
const int ldrPin = 8;

void setup() {
  Serial.begin(9600);
}

void loop() {
  int ldrValue = analogRead(ldrPin);

  Serial.print("LDR Value: ");
  Serial.println(ldrValue);

  delay(10); 
}

Guides and Blogs

  • First time setup

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  • Automatic Street Lights

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  • How Does an LDR work ?

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