LM393 Photosensitive Light-Dependent Control Sensor LDR Module

LM393 Photosensitive Light-Dependent Control Sensor Module is a light sensor module based on an LDR (Light Dependent Resistor) and the LM393 voltage comparator. It is widely used in light-sensitive automation systems for detecting day/night or ambient light changes.

Key Features of LM393 LDR Module:

• • Light Detection: Uses an LDR to detect changes in ambient light.
  • Adjustable Sensitivity: Onboard potentiometer to set light threshold sensitivity.
  • Comparator Output: LM393 dual comparator provides digital output (0 or 1).
  • Digital and Analog Output: Can output both analog voltage (AO) and digital signal (DO).
  • Power LED and Output LED: For real-time feedback of power and signal status.

Technical Specifications:

• • Operating Voltage: 3.3V to 5V DC
  • Output: Digital (0 or 1) and Analog voltage
  • Sensor Type: Photoresistor (LDR)
  • Comparator: LM393 voltage comparator
  • Mounting Holes: For easy installation
  • Size: Approx. 36mm x 15mm

Wiring Diagram:

• • VCC: Connect to 3.3V or 5V
  • GND: Ground
  • DO: Digital Output (connect to GPIO pin)
  • AO: Analog Output (for variable voltage read)

Applications:

• • Automatic Street Lighting
  • Smart Home Lighting Systems
  • Day/Night Detection for IoT Projects
  • Security Systems with Light Sensitivity

Equivalent Modules:

• • Generic LDR Analog Module
  • KY-018 LDR Sensor

Datasheet / Resources:

• • Download LM393 Comparator Datasheet (TI)
  • Module Datasheet & Wiring

Keywords:

• • LM393 LDR Module
  • Photosensitive Light Sensor
  • Light Dependent Resistor Sensor
  • Arduino Light Sensor Module
  • Ambient Light Detector

Package Includes:

• • 1 x LM393 Photosensitive LDR Module