3V Smart Light Control Sensor Switch Module for DIY LED Lamp/Robot

🌟 Key Features

• Automatic Light Detection: Automatically switches the LED off in daylight and on in darkness — ideal for energy-saving night lights or projects.
• Safe 3V DC Operation: Designed for low-voltage 3V DC power — perfectly compatible with Arduino, Micro:bit, and classroom electronics kits.
• Versatile Applications: Great for DIY robots, electronic experiments, sensor learning, or LED night light projects.
• Expandable Functionality: Can be connected to a relay module to control other electrical devices such as motors or lamps.

💡 Product Overview

The 3V Smart Light Control Sensor Switch Module is a compact, easy-to-use sensor that detects ambient light levels using an LDR (Light Dependent Resistor).
When the surrounding light dims, the module automatically powers on the connected LED, functioning as an auto night lamp.

This beginner-friendly design is ideal for students, hobbyists, and makers learning basic electronics, sensor logic, or smart lighting projects. It can also be integrated into small robot cars, model displays, or school STEM lessons.

⚙️ Technical Specifications

🔌 How to Use

• Power Connection:
  Connect a 3V DC power supply to the module’s input pins (observe correct polarity).
• LED Connection:
  • Connect the long leg (anode) of the LED to the “+” terminal.
  • Connect the short leg (cathode) to the “–” terminal.
• Optional Expansion:
  For controlling motors or higher power devices, connect the output through a relay module.

⚠️ Important Notes

• Power must be DC 3V only.
• The module can directly drive only LED lights.
  To control larger loads (motors, lamps, etc.), use a relay expansion module.

📦 Package Includes

• 1 × 3V Smart Light Control Sensor Switch Module