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Key Features:

• 12mm diameter high-sensitivity LDR/photoresistor

• Resistance decreases with increasing light intensity

• Two-terminal, through-hole component

• Ideal for Arduino, Raspberry Pi, solar trackers, and light-based automation

• Large sensing area ensures fast response and better accuracy

• Works with analog and digital circuits

Product Description (Detailed):

The 12mm LDR (Light Dependent Resistor) is a highly sensitive passive light sensor that reduces its resistance in response to increased light levels. This makes it ideal for detecting ambient light and triggering electronic responses, such as turning on/off lights or adjusting brightness in smart systems.

With a large 12mm sensing diameter, it offers better light absorption and faster response compared to smaller LDRs. It's widely used in automatic night lamps, solar lighting, garden automation, Arduino light meters, and IoT-based daylight sensing systems.

Simple to use in both analog and digital circuits, the LDR outputs variable resistance which can be read using Arduino's analog pins to implement light-based control.

Technical Specifications:

How to Use:

1. Connect one pin of the LDR to Vcc (5V).

2. Connect the other pin to a voltage divider resistor (e.g., 10KΩ) and then to GND.

3. The junction between LDR and resistor connects to an analog pin (e.g., A0 on Arduino).

4. Use analogRead() to monitor light intensity and trigger outputs accordingly.

Common setup: LDR + 10KΩ resistor voltage divider → Arduino analog input.

Applications:

• Automatic street lighting systems

• Light-sensing circuits for Arduino/IoT

• Solar garden lamp automation

• Brightness control for LCD displays

• Smart lighting and energy-saving devices

• Security systems (day/night detection)

Package Includes:

• 1× 12mm LDR (Light Dependent Resistor)