Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	5V DC
Output Signal	Digital Switching (0 or 1)
Detection Component	Photoresistor (LDR)
Comparator Chip	LM393
Sensitivity Adjustment	Potentiometer included
Pin Configuration	3-Pin or 4-Pin options
Indicator LED	Power and Output status LEDs
PCB Size	32mm x 14mm
Mounting Holes	3mm diameter
Application Compatibility	Arduino, Raspberry Pi, ESP32

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Exceeded expectations

Very accurate brightness detection. I integrated this into a smart home system to control blinds, and it reacts instantly to sunlight changes. Great product for the price.

Anonymous

Mar 28, 2026

Rating: 4/5

Solid build quality

The PCB looks professional and the soldering points are clean. The only reason for 4 stars instead of 5 is that the header pins were not pre-soldered on my unit, but that's a minor inconvenience.

Anonymous

Mar 19, 2026

Rating: 5/5

Reliable and sensitive

I bought five of these for a robotics project. All of them performed consistently. The LM393 comparator provides a clean digital output which prevents flickering when the light level is near the threshold.

Anonymous

Mar 05, 2026

Rating: 5/5

Perfect for my night light project

This sensor module works exactly as described. The potentiometer makes it very easy to calibrate the sensitivity for different lighting conditions. I used it with an Arduino Uno to trigger an LED strip when the room gets dark.

Anonymous

Mar 01, 2026

Rating: 4/5

Good value, clear instructions needed

The hardware quality is solid and the response time is fast. However, beginners might struggle without a wiring diagram. Once I found a tutorial online, it worked flawlessly for my automatic garden lights.

Anonymous

Mar 01, 2026

Rating: 5/5

Great starter sensor

As someone new to electronics, this was very forgiving. The onboard LEDs help you visualize what the sensor is detecting before you even write code. Highly recommended for learning.

5 FAQ

Q: Can I power this directly from a 3.3V pin on my ESP32?

A: While the logic output is compatible with 3.3V systems, the module is designed for 5V operation for optimal performance. We recommend powering it with 5V and connecting the output pin directly to your ESP32 GPIO.

Q: Are the header pins included in the package?

A: Yes, the package includes the PCB module and a set of male header pins that you can solder onto the board yourself. This allows for flexible mounting options.

Q: Does this module output analog or digital signals?

A: This specific module outputs a digital signal (HIGH or LOW) based on the threshold you set with the potentiometer. If you need analog values, you would need a different module with an AO pin.

Q: Is the sensitivity adjustable in complete darkness?

A: The potentiometer adjusts the threshold at which the switch triggers. You can tune it so that even a tiny amount of light triggers the sensor, or require brighter light, but it cannot detect light if there is absolutely zero photons hitting the LDR.

Q: What is the maximum current this sensor can switch?

A: The module itself is a low-power sensor intended for signal detection. It cannot drive high-current loads like motors directly. You should use the output signal to control a relay or transistor for heavier loads.

Explore your interests

STC32G12K128 STC8H8K64U Microcontroller Small System Core Board Development Board Emulator

$16.50

Youxin Electronics_STM32H743IIT6 Core Board System Board Learning Board STM32 Development Board

$118.00

Arduino DUE Development Board 32-bit ARM Controller A000062 Italian Official Original Import with Cable

$299.00

Ultrasonic Sensor HC-SR04 Ultrasonic Distance Measuring Module Bracket US015-025-026-100

$3.16

Serial SHT20 Chip Temperature and Humidity Sensor Test, SHT30 Chip Measurement and Monitoring Module by Viter Intelligence

$11.00

High-Speed Yabo Smart Raspberry Pi 4B Motherboard Development Board Accessories RaspberryPi 2G/4G/8G RAM Py

$494.30

Magnetic Circular Counting Chips, Two-Sided Flip Coins for Elementary Math, Kindergarten Early Education, Ten-Frame Matrix, Addition/Subtraction within 10 & 20, Teaching Tools

$11.90

HC-SR501 Human Motion Infrared Sensor Module Compatible with Arduino micro:bit Eco-Friendly

$7.50

SANSI White Label Class A Glass Graduated Cylinder C18 Micro-Precision Demulsification Cylinder with Scale Measurement Includes Certificate Ground Joint Stopper Hexagonal Bottom Borosilicate Glass Lab Equipment

$3.68

EV2400 Battery Unlock Fuel Gauge Programmer MSP430 HPA500 Evaluation Module Interface Board SMBus

$323.00

Cube Three-View Teaching Aid with Grid - 3D Geometry Observation Tool for Grades 4-5 Math (2cm Cubic Blocks Set)

$15.10

OrangePi Orange Pi Zero3 Zero 3 Development Board Allwinner H618 Orange Pi

$228.00

Zave MAX30100 MAX30102 Module for Blood Oxygen, Wrist Heart Rate, Pulse, and Heartbeat Detection

$3.39

12V Stable Version Light-Control Switch No-Light Sensing with Extension Cable Photoresistor Plus Relay Module

$49.20

STM32 Smart Car 51 Microcontroller Arduino Obstacle Avoidance Chassis Kit Mecanum Wheel Robot Car

$40.80

Tech Small Production Small Invention DIY Piano Electronic Keyboard Real Playable Science Small Handmade DIY Materials

$33.00

[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range

$23.65

Transparent 3D Geometric Model Perspective Decomposition Graphic Teaching Aid, Complete Set for Elementary Grades 1-6 Math

$6.80

DHT22 Single-Bus Digital Temperature & Humidity Sensor AM2302 Module Electronic Building Blocks

$10.42

E18-D80NK Infrared Photoelectric Switch Diffuse Reflection Obstacle Avoidance Sensor Module 3-80CM

$12.60

LAN8720 Module Network Module Ethernet Transceiver RMII Interface Development Board Xinwei Electronics

$7.85

STC15W408AS Core Board Minimum System Board 51 Microcontroller Development Board TTSOP20 Learning Board

$18.47

New Version MEGA2560 R3 Development Board, Improved MEGA2560 R3 with Sensor Expansion Board

$13.68

Gradient Visual Illusion Kit: Electric Rotating Assembly Toy for Maker DIY, Paintable Handmade Model

$8.72

51/AVR Microcontroller Core Development Board STC89C52RC/51MCU Experiment Board/ATMEGA32 Learning Board

$37.90

[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set

$15.00

GY-30 302 Digital Light Intensity Illuminance Sensor BH1750FVI Module Light Sensor Ball

$7.41

Foldable Clothes Drying Rack Floor Standing Home Balcony Bedroom Hanging Clothes Quilt Drying Artifact Outdoor Cooling Rod Indoor Drying Rack

$47.10

Metal Detector Module Non-Contact Metal Induction Sensor Detection Module Metal Detector

$8.70

RV1103 Miniature Linux Development Board: RISC-V Vision and AI with Ethernet Port

$53.10

For Arduino Development Board R3 Mainboard Microcontroller Module Kit Programming Learning Board Sensor Suite

$78.00

Xuefen Geometry Stamping and Tracing Set for Grades 1-2, 3D and 2D Ink Pads, Math Learning Tools, Cube and Cuboid Models

$4.51

Rubber Tire Toy 4WD Smart Car Wheels Car Model Robot Accessories (Suitable for 2mm Axle)

$0.50

E18-D80NK Infrared Obstacle Avoidance Sensor Proximity Switch Smart Robot Car 10-80cm

$6.30

OPT3001/3002/3004 Ambient Light Sensor Module Measures Visible Light Density Digital Optical Sensor

$8.14

51 MCU Minimum System STC89C52 DIP40 Through-Hole Smart Car Main Control Board Learning Experiment

$19.80

Outdoor Adventure Kids' Insect Observation Box with Magnifying Glass, Boys & Girls Toy for Exploration, Butterfly Catching and Fish Scooping Tools

$7.80

Risym Laser Head Sensor Module Suitable for Laser Module Expansion Board Laser Sensor Development Board

$2.82

Freeze-Dried Chicken Treats for Dogs: Nutritious Weight-Gain Breast Meat Chunks for Puppies – Teeth Cleaning, Grain Mixing, Universal Use

$3.90

Soil Moisture Sensor Probe Soil Moisture Meter Detection Module Sensor Separate Probe

$2.39