LDR module

LDR Light Sensor Module – Accurate Light Intensity Detection Made Easy

The LDR (Light Dependent Resistor) module is a compact, ready‑to‑use light sensing solution that converts varying light levels into a proportional analog voltage. Built around a high‑quality photoconductive cell, the module incorporates a precision resistor and a simple voltage divider circuit, yielding a smooth and reliable output that can be read directly by microcontrollers, ADCs, or linear analyzers without additional circuitry.

Designed for rapid prototyping and mass deployment, this module offers an extended dynamic range, minimal power consumption, and robust resistance to temperature drift. Its small 2 × 4 mm footprint and screw‑mountable header make integration into board‑level, wire‑wrap, or panel‑mounted designs straightforward. The rugged housing protects the sensor from dust and moisture, ensuring consistent performance in both indoor and outdoor environments.

• Key Spec 1: Light‑to‑resistance range 1 kΩ (dark) – 100 kΩ (bright), 10 µW–5 mW illumination
• Key Spec 2: Supply voltage 3.3 V – 5 V, 3 mA max current draw
• Key Spec 3: Output type: 0 V–V_CC analog voltage proportional to incident light intensity
• Common Use Case: Automatic brightness control, ambient light detection, solar tracking, light‑metering, and dimming applications in consumer electronics and automotive systems