This digital LDR module detects ambient light intensity and provides a TTL-compatible digital output when light crosses a set threshold. Ideal for automatic lighting systems, security devices, and light-sensitive triggers, it features an adjustable sensitivity potentiometer for precise calibration.
Key Benefits
✔ Light-Activated Switching – Digital HIGH/LOW output
✔ Adjustable Sensitivity – Fine-tune detection threshold
✔ Compact & Efficient – Low power consumption
✔ Easy Integration – Works with Arduino/RPi/ESP
Technical Specifications
Core Specifications
Sensor Type: Photoresistor (LDR)
Detection Range: Visible Light Spectrum
Output Signal: Digital (TTL) – HIGH (dark) / LOW (bright)
Operating Voltage: 3.3V–5V DC
Electrical Characteristics
Current Draw: <5mA
Response Time: <20ms
Interface: 3-pin (VCC, GND, OUT)
Physical Properties
Dimensions: 30mm × 15mm × 7mm
Mounting: 2x M2 screw holes
Indicator LED: Lights when threshold is crossed
Why Choose This LDR Module?
✔ Plug-and-Play – No analog calibration needed
✔ Energy-Saving – Minimal power usage
✔ Versatile – Ideal for DIY smart home projects
Common Uses:
Automatic streetlights
Night/day detection for cameras
Light-triggered alarms
Pro Tip:
Adjust the potentiometer to set the desired light threshold.
Pair with a relay for automatic light control!
Package Includes:
1 x Digital LDR Module