LM393 Photosensitive light dependent resistor LDR sensor module

LM393 Photosensitive LDR Sensor Module detects light intensity using an onboard LDR and LM393 comparator. Ideal for automatic light systems, streetlight control, and Arduino-based smart projects.

Technical Specifications:

1. Operating Voltage: 3.3V – 5V DC
2. Output Type: Digital (High/Low)
3. Comparator IC: LM393
4. Light Sensor Type: Photosensitive LDR
5. Adjustable Sensitivity: Yes (via onboard potentiometer)
6. Indicator LEDs: Power & Output Status
7. Output Interface: 3-pin (VCC, GND, D0)
8. PCB Dimensions: Approx. 32 mm × 14 mm
9. Operating Temperature: -30°C to +80°C

The LM393 Photosensitive Light Dependent Resistor (LDR) Sensor Module is a ready-to-use light detection module that senses ambient brightness using an LDR and provides a digital output signal based on the set threshold.

It features an LM393 voltage comparator chip that converts the analog resistance change of the LDR into a clean digital HIGH/LOW output, making it easy to interface with Arduino, ESP32, NodeMCU, or Raspberry Pi.

The module also includes an adjustable potentiometer to fine-tune the light sensitivity, along with power and output indicator LEDs. It’s widely used in automatic lighting, day/night detection, and IoT automation projects.

🧠 Features:

1. Detects ambient light intensity using an LDR
2. Adjustable detection threshold via potentiometer
3. Onboard LM393 comparator ensures stable digital output
4. Power and output indicator LEDs for easy debugging
5. Compact design and easy mounting holes
6. Compatible with Arduino, ESP32, Raspberry Pi, and other microcontrollers

📦 Applications:

1. Automatic streetlight and lamp control
2. Smart lighting and home automation systems
3. Day/night sensing for IoT projects
4. Light-following or line-tracking robots
5. Energy-saving and solar-tracking systems