Light-dependent Resistor Sensor Module

A light-dependent resistor (LDR) sensor module for detecting light levels in your projects. The resistance changes with light intensity—decreasing in bright light and increasing in darkness—making it perfect for light-activated switches and automatic lighting systems.

Features both digital and analog outputs, allowing you to detect light/dark thresholds or measure precise light levels. Compatible with Arduino, Raspberry Pi, micro:bit, and other microcontrollers.

Key Features

• LDR Sensor – Resistance varies with light intensity
• Dual Output – Digital (DO) and analog (AO) outputs
• Adjustable Threshold – Onboard potentiometer for digital trigger level
• 3.3V Compatible – Works with micro:bit and 3.3V systems
• 4-Pin Interface – Simple connection to microcontrollers

Pin Configuration

• VCC: 3.3V power supply
• GND: Ground reference
• DO: Digital output (high/low based on threshold)
• AO: Analog output (proportional to light level)

Ideal For

• Light-activated switches
• Automatic lighting systems
• Day/night detection
• Light level monitoring
• Arduino and micro:bit projects

Package Contents

• 1× Light-dependent Resistor Sensor Module