An LDR module refers to a pre-assembled circuit board that incorporates a Light Dependent Resistor (LDR) along with additional components to facilitate easier integration and use in electronic projects. Here’s a breakdown of what an LDR module typically includes and its functions:

Components of an LDR Module

1. LDR Sensor: The primary component that changes resistance based on the amount of light falling on it. It detects light intensity.
2. Resistor: A fixed resistor is usually included in the circuit to form a voltage divider with the LDR. This configuration helps convert the change in resistance of the LDR into a measurable voltage change.
3. Microcontroller Interface: The module often includes pins or terminals for easy connection to a microcontroller (like Arduino, Raspberry Pi, etc.), allowing it to read the voltage output from the LDR.
4. Output Signal:

Analog Output: Many LDR modules provide an analog output that corresponds to the light intensity. This can be read directly by the analog input of a microcontroller.

Digital Output: Some modules include a comparator circuit to provide a digital output (high or low) based on a predefined light threshold.

5. Power Supply: The module may have a power supply pin to connect to a voltage source, typically ranging from 3.3V to 5V.
6. Mounting Options: Many LDR modules come with mounting holes or PCB designs that make it easier to attach them to projects or enclosures.

Advantages of Using an LDR Module

• Ease of Use:.
• Compact Design:
• Adjustable Sensitivity:.
• Versatile Applications.

Common Applications of LDR Modules

• Light Sensors
• Color Sensors:.
• Line Following Robots:.
• Solar Tracking Systems:

· Automatic Lighting Control:.

· Color Sensing:.

· Robotics:.

· Environmental Monitoring:

Model Type: Light Dependent Resistor Module

Operating Voltage: 3.3V to 5V

Operating Current: 15 mA

Output Type: Digital (high signal in light presence, low signal in darkness)

Sensitivity Adjustment: Adjustable using an onboard potentiometer

Mounting Type: M3 mounting hole for easy attachment

Indicators:

• Power LED
• Status LED

Features:

• High sensitivity to environmental light intensity
• Simple integration with microcontrollers
• Visual indicators for operational status