Description
The KY-018 Light Sensor Module uses a photoresistor (LDR) to detect light intensity, making it ideal for light-sensitive Arduino, Raspberry Pi, and microcontroller projects.
This module outputs an analogue voltage based on ambient light levels, allowing you to monitor brightness and trigger events such as automatic lighting, light alarms, solar tracking, and daylight detection systems.
It’s ideally suited for applications where you need to measure changing light conditions, and thanks to its simple design and 3-pin interface, it integrates easily into breadboards or embedded projects.
- Module: KY-018
- Sensor Type: Photoresistor (LDR – Light Dependent Resistor)
- Output Type: Analogue (voltage varies with light)
- Operating Voltage: 3.3V – 5V
- 3-Pin Interface: VCC, GND, A0 (Analogue Output)
- Response Range: Sensitive to visible light
- Module Size: 19mm x 15mm
Key Features:
- Module: KY-018
- Function: Light Level Detection
- Sensor: Light Dependent Resistor (LDR)
- Output: Analogue voltage (0–1023 on Arduino)
- Voltage: 3.3V – 5V
- Interface: VCC, GND, A0
- Compatible with Arduino, Raspberry Pi (via ADC)
- Compact and breadboard friendly
- Ideal for light automation projects
What’s Included:
- 1x KY-018 Light Sensor Module (Photoresistor)
Great For:
- Automatic Light Control
- Day/Night Detection
- Light Intensity Logging
- DIY Solar Trackers
- STEM & Educational Kits
- Environmental Monitoring Projects
Usage Tips:
- Use analogRead() on Arduino to read light levels
- Output voltage increases as brightness increases
- Add threshold logic to turn lights on/off automatically
- Combine with LEDs or relays for smart control systems
- Raspberry Pi users require an external ADC module for analogue input
