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Photosensitive Resistor Sensor Module-LDR (KY-018)

SKU: 2V8CHEJ7VQ
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4.5 (72 reviews)
The KY-018 Photosensitive Resistor Sensor Module is a compact light detection module that uses a Light Dependent Resistor (LDR) to measure ambient light intensity. As the surrounding light level changes, the resistance of the LDR varies, producing an analog voltage that can be read by a microcontroller for accurate light sensing. The module features a simple three-pin interface, making it...
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The KY-018 Photosensitive Resistor Sensor Module is a compact light detection module that uses a Light Dependent Resistor (LDR) to measure ambient light intensity. As the surrounding light level changes, the resistance of the LDR varies, producing an analog voltage that can be read by a microcontroller for accurate light sensing.

The module features a simple three-pin interface, making it easy to connect directly to Arduino, ESP32, STM32, Raspberry Pi Pico, and other development boards. Due to its low cost, compact design, and ease of use, the KY-018 is widely used in automatic lighting systems, solar tracking, smart home automation, environmental monitoring, and educational electronics projects.

The KY-018 is an ideal solution for applications requiring continuous monitoring of ambient light conditions.

Key Features

  • High-sensitivity Light Dependent Resistor (LDR)
  • Measures ambient light intensity
  • Analog voltage output
  • Simple three-pin interface
  • Fast response to light changes
  • Compact PCB module design
  • Low power consumption
  • Stable and reliable operation
  • Easy microcontroller interfacing
  • Suitable for indoor and outdoor light sensing
  • Compatible with Arduino, ESP32, STM32, and Raspberry Pi
  • Ideal for automation and environmental monitoring
  • Durable through-hole construction
  • Perfect for educational and DIY electronics projects

Shipping & Returns

Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.

Specifications

Specifications:

Module Type: Photosensitive Resistor Sensor Module
Model: KY-018
Sensor Type: Light Dependent Resistor (LDR)
Detection Method: Ambient Light Intensity Measurement
Operating Voltage: 3.3V to 5V DC
Operating Current: Less Than 5mA
Output Type: Analog Output
Output Signal: Analog Voltage Proportional to Light Intensity
Spectral Response: Visible Light Range
Response Time: Fast Response
LDR Resistance: Varies with Ambient Light Level
Interface Pins: VCC, GND, S
Operating Temperature: -20°C to +70°C
Storage Temperature: -40°C to +85°C
PCB Dimensions: Approximately 18.5mm × 15mm
Mounting Type: Through-Hole Module
Compatibility: Arduino, ESP32, STM32, Raspberry Pi Pico, AVR, PIC

Additional Resources

Photosensitive Module.PDF

FAQ

1. What is the KY-018 Photosensitive Resistor Sensor Module used for?

The KY-018 is used to measure ambient light intensity for applications such as automatic lighting, smart home automation, and environmental monitoring.

2. How does the KY-018 detect light?

The module uses a Light Dependent Resistor (LDR), whose resistance changes according to the amount of light falling on its surface.

3. Can the KY-018 be connected directly to Arduino and ESP32 boards?

Yes, the module provides an analog output and can be directly connected to Arduino, ESP32, STM32, Raspberry Pi Pico, and other microcontrollers with analog input pins.

4. Does the KY-018 provide analog or digital output?

The KY-018 provides an analog voltage output that varies continuously with the ambient light level.

5. What applications commonly use the KY-018 sensor?

The sensor is widely used in automatic lighting systems, day/night detectors, solar trackers, weather stations, smart home devices, IoT applications, and educational electronics projects.

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