KY-018 Light Sensor Module (Photoresistor, 3.3V-5V)

Key Features:

• Light Intensity Detection: Converts ambient light levels into an analog signal
• Wide Voltage Compatibility: Operates on 3.3V – 5V, perfect for Arduino, ESP32, and Raspberry Pi
• Simple Interface: Outputs analog signal (AO) for varying light intensity
• High Sensitivity: Detects changes in ambient light for automatic brightness control and light-based automation
• Compact Design: Easy to integrate into DIY electronics projects

Technical Specifications:

• Module Type: KY-018 Photoresistor Module
• Operating Voltage: 3.3V – 5V
• Output: Analog voltage based on light intensity
• Sensor Type: Photoresistor (LDR – Light Dependent Resistor)
• Size: Compact for embedded applications

How It Works:

• The photoresistor (LDR) changes resistance based on light intensity.
• More light = lower resistance, resulting in a higher analog output.
• Less light = higher resistance, resulting in a lower analog output.

Application Examples:

✔ Automatic Night Lights – Adjust brightness based on room lighting
✔ Light-Controlled Switches – Turn on/off devices based on ambient light
✔ Smart Agriculture – Monitor sunlight exposure for plant growth
✔ DIY Projects & Robotics – Light-following robots, smart home systems

Why Choose This Module?

✔ Easy to Use & Integrate – Simple analog output for direct sensor readings
✔ Versatile Applications – Works with Arduino, ESP8266, Raspberry Pi, and microcontrollers
✔ Low Power Consumption – Efficient design for battery-powered projects