4-Pin LDR Photosensitive Sensor Module (Light-Dependent Control)

The 4-Pin Photosensitive Sensor Module is designed to detect light intensity and control electronic devices based on ambient light levels. This module utilizes a light-dependent resistor (LDR) to sense light and provide a corresponding output signal. It is ideal for a variety of applications including automatic lighting control, light-activated alarms, and smart home projects.

Technical Specifications:

• Operating Voltage: 3.3V to 5V
• Output Type: Digital and Analog
• Sensitivity: Adjustable via onboard potentiometer
• Sensor Type: Light-Dependent Resistor (LDR)
• Output Current: Up to 15mA
• Dimensions: Compact size for easy integration
• Interface: 4-pin header (VCC, GND, DO, AO)

Pin Configuration:

1. VCC (Pin 1): Connect to the power supply (3.3V to 5V).
2. GND (Pin 2): Connect to ground.
3. DO (Digital Output, Pin 3): Outputs a digital signal (HIGH or LOW) based on the light intensity threshold set by the potentiometer.
4. AO (Analog Output, Pin 4): Outputs an analog voltage proportional to the light intensity.

Features:

• Dual Outputs: Provides both digital and analog outputs for versatile use.
• Adjustable Sensitivity: Onboard potentiometer allows customization of the light threshold for the digital output.
• Wide Operating Voltage: Compatible with both 3.3V and 5V systems.
• Compact Design: Small form factor for easy integration into various projects.
• Easy to Interface: Standard 4-pin header for straightforward connections to microcontrollers and other devices.

Applications:

• Automatic lighting control
• Light-activated alarms and alerts
• Smart home projects
• Daylight harvesting systems
• Ambient light sensing
• Solar tracking systems

Usage Tips:

1. Connecting the Module:
   • Connect the VCC pin to the power supply (3.3V or 5V).
   • Connect the GND pin to the ground of your system.
   • Connect the DO pin to a digital input on your microcontroller if you need a digital signal.
   • Connect the AO pin to an analog input on your microcontroller if you need an analog signal proportional to the light intensity.
2. Adjusting Sensitivity:
   • Use the onboard potentiometer to adjust the sensitivity threshold for the digital output. Turn the potentiometer until the desired light threshold is reached.
3. Reading the Output:
   • For digital output, monitor the DO pin. It will output HIGH when the light intensity is above the threshold and LOW when it is below.
   • For analog output, read the voltage on the AO pin. This voltage will vary with the light intensity, providing a more granular measurement.

The 4-Pin Photosensitive Sensor Module is a versatile and reliable component for detecting light intensity and controlling electronic devices based on ambient light levels. Its dual output options and adjustable sensitivity make it suitable for a wide range of applications in automation and smart home projects.

Package includes:

• 1 x 4-Pin LDR Photosensitive Sensor Module (Light-Dependent Control)