Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	5V DC / 12V DC
Pin Configuration	3-Pin and 4-Pin Options
Detection Component	High-Sensitivity Photosensitive Resistor (LDR)
Output Signal	Digital Switch Output (DO) & Analog Output (AO)
Sensitivity Adjustment	Onboard Potentiometer for Threshold Tuning
Indicator LED	Power and Status Indicator Lights
PCB Dimensions	32mm x 14mm x 8mm
Mounting Hole Diameter	3.0mm
Compatible Platforms	Arduino, Raspberry Pi, ESP32, STM32
Application Scope	Light Control Switches, Camera Exposure, Street Lights

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Great addition to my sensor kit

Compact size fits perfectly in tight spaces. I integrated this into a smart blinds controller, and it reacts precisely to sunrise and sunset levels after a quick calibration. Fast shipping and well-packaged too.

Anonymous

Mar 28, 2026

Rating: 5/5

Excellent for beginners

As someone new to electronics, I found this module very forgiving. The built-in comparator chip means I don't need to write complex code to interpret raw resistance values; I just read HIGH or LOW. Highly recommended for students.

Anonymous

Mar 20, 2026

Rating: 5/5

Perfect for my Arduino night light project

This sensor module worked flawlessly right out of the box. The potentiometer makes it very easy to calibrate the exact light level where the switch triggers. I used it to control an LED strip that turns on automatically when the room gets dark.

Anonymous

Mar 13, 2026

Rating: 4/5

Works as advertised

Solid build quality and the soldering points are clean. It detects light changes instantly. Just ensure you supply the correct voltage (5V vs 12V) depending on which version you purchased to avoid damaging the onboard components.

Anonymous

Mar 10, 2026

Rating: 5/5

Reliable and sensitive

I bought five of these for a garden lighting automation system. They are consistent across all units and handle outdoor conditions well inside their enclosures. The analog output is also useful for reading gradual light changes.

Anonymous

Mar 02, 2026

Rating: 4/5

Good value, clear documentation needed

The hardware quality is solid and the response time is quick. I deducted one star because the pinout diagram on the back was a bit faint, but once I figured out the VCC, GND, and DO pins, it worked great with my ESP8266.

5 FAQ

Q: Does this come with jumper wires or headers pre-soldered?

A: The module usually comes with the header pins included but not soldered, allowing you to choose between straight or right-angle mounting. Jumper wires are not included in the standard package but can be purchased separately.

Q: Can this module be used directly with a 3.3V microcontroller like the ESP32?

A: Yes, but please note that while the sensor works at 3.3V, the output logic high level will depend on the input voltage. For best compatibility with 3.3V logic, we recommend powering the module at 3.3V if supported, or using a voltage divider on the output pin if powering at 5V.

Q: What is the maximum current this module can switch directly?

A: This sensor module is designed for signal detection and logic control, not for driving high-power loads directly. The digital output pin should only connect to microcontroller inputs or low-current LEDs (under 20mA). To control motors or lamps, please use the output to trigger a relay or transistor circuit.

Q: Is the sensitivity adjustable for different lighting conditions?

A: Absolutely. There is a blue potentiometer on the board. By rotating it with a small screwdriver, you can adjust the threshold at which the digital output switches from high to low, making it suitable for anything from dim indoor light to bright sunlight.

Q: What is the difference between the 3-pin and 4-pin versions?

A: The 3-pin version typically provides only the Digital Output (DO), acting as a simple switch. The 4-pin version includes both the Digital Output (DO) and the Analog Output (AO), allowing you to read the precise light intensity value, not just a threshold trigger.

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