5mm LDR (Light Dependent Resistor) – detects light levels for Arduino, automatic lighting, and smart electronics projects Read more
This 5mm Light Dependent Resistor (LDR) is a compact photoresistor that changes its resistance based on the surrounding light intensity. It offers high resistance in darkness and low resistance in bright light, making it ideal for use as a light sensor in DIY electronics and automation systems.
Commonly used in Arduino, ESP32, Raspberry Pi, and IoT projects, this LDR is perfect for building automatic street lights, solar trackers, light meters, and smart lighting systems.
Key Features:
Type: Photoresistor / LDR
Size: 5mm diameter
Light-sensitive resistance component
Easy to integrate into analog circuits
Works with 3.3V or 5V (with voltage divider)
High resistance in dark, low resistance in light
Ideal for Arduino, ESP32, Raspberry Pi, and sensor-based systems
Applications: Auto light control, smart homes, solar trackers, light alarms
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