Photo Resistor (LDR) Module
₵10.00
The LDR Light Sensor Module uses a sensitive photoresistor to detect ambient light intensity. It features an onboard comparator chip (LM393) which provides a clean digital output, making it easy to build automatic night-light systems.
Simply use a screwdriver to adjust the trigger point—turn it one way to trigger in dim light, and the other way for pitch darkness.
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Key Features
- Dual Output: Provides both an Analog (AOUT) signal to measure the relative brightness and a Digital (DOUT) signal for a simple ‘on/off’ trigger.
- Adjustable Sensitivity: An onboard potentiometer (the blue square) allows you to precisely set the light level threshold for the digital (DOUT) output.
- Reliable Comparator: Uses the common LM393 comparator chip to provide a stable and clean digital signal.
- Easy to Use: Operates on standard 3.3V to 5V, making it fully compatible with Arduino, ESP8266/ESP32, and other microcontrollers.
- Indicator LEDs: Includes one LED for power and another that lights up when the digital output is triggered.
Technical Specifications
| Feature | Specification |
| Operating Voltage | DC 3.3V – 5V |
| Comparator Chip | LM393 |
| Sensor Type | GL55xx Series Photoresistor (or similar) |
| Output | 1x Analog (AOUT), 1x Digital (DOUT) |
| Board Dimensions | Approx. 32mm x 14mm |
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