Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Operating Voltage	DC 5V
Control Signal	Digital Switch Output (0 and 1)
Relay Contact Capacity	250VAC 10A / 30VDC 10A
Sensor Type	Photoresistor (LDR)
PCB Dimensions	32mm x 14mm
Mounting Hole Size	3.0mm Diameter
Interface Type	3-Pin PH2.0 Connector
Power Indicator	Red LED
Sensitivity Adjustment	Blue Potentiometer
Package Includes	1 x Sensor Module

5 reviews

Anonymous

Apr 12, 2026

Rating: 5/5

Perfect for my Arduino Night Light

Works exactly as described. Adjusted the potentiometer easily to trigger the relay when the room lights go off. Great for DIY automation projects.

Anonymous

Apr 07, 2026

Rating: 5/5

Reliable dark detection

I used this to trigger a cooling fan when the enclosure gets dark which indicates the lid is closed. Very responsive and stable output.

Anonymous

Feb 25, 2026

Rating: 5/5

Great value for money

Bought 5 for a classroom project. All worked out of the box. Students were able to integrate them into their circuits without issues.

Anonymous

Feb 10, 2026

Rating: 3/5

Relay is noisy

Functionality is fine and it detects light changes accurately. However, the mechanical relay click is quite loud if you are using it in a quiet room.

Anonymous

Jan 31, 2026

Rating: 4/5

Good module, slight wiring confusion

The module works well and is sensitive to light changes. The pinout wasn't clearly labeled on the board itself, so I had to check the datasheet.

5 FAQ

Q: Is the activation triggered by light or darkness?

A: It is adjustable. You can use the blue potentiometer to set the threshold for either light-activated or dark-activated switching.

Q: Can I use this with a Raspberry Pi?

A: Yes, but please ensure logic levels match. The Pi uses 3.3V logic while this module is 5V. A level shifter may be required for the signal pin.

Q: Can I reverse the logic output without changing code?

A: Yes, turning the potentiometer fully one way or the other will change the trigger point from high-to-low or low-to-high based on light intensity.

Q: What is the maximum load this relay can handle?

A: The relay is rated for 250VAC at 10A or 30VDC at 10A. Please do not exceed these limits to ensure safety and longevity.

Q: Does this module include jumper wires?

A: No, the package includes only the sensor module. Jumper wires need to be purchased separately based on your project requirements.

Explore your interests

Beikecom ESP32-S3 Core Board (N8R2/N16R8) with Bluetooth/WiFi Module, 44-Pin Xiaozhi Robot

$29.20

Pulse Heart Rate Sensor Compatible Bio-Simulation Sensor Header Pins No Soldering Required

$6.35

[Youxin Electronics] Soil Moisture Meter Detection Module, Soil Moisture Sensor for Intelligent Robot Cars

$2.09

N52 Super Strong Square Magnet, Neodymium Iron Boron Bar Magnet, Powerful Magnetic Blocks

$10.50

Instax Shutter Timer Selfie Artifact Fujifilm instax SQ Series Non-Destructive Installation

$58.00

STM32 Beginner Kit Minimum System Board Electronic Breadboard Same as University Science Association Models

$56.60

lalaci Round N52 Strong Magnet High Performance Powerful Small Magnet Diameter 1/2/3/4/5/6/8 Manufacturer NdFeB

$3.25

Car Vibrator/Piezoelectric Vibration Sensor Motorcycle Anti-Theft Alarm Vibration Sensor Module Ceramic Plate

$13.00

N52 Strong Magnet Small Round Mini Powerful Tiny Magnet High-Performance Neodymium Iron Boron Super Strong Magnet Steel 2-8mm

$5.50

Natural Cinnabar Rose Beads, Purple Gold Sand 'Blooming Prosperity' DIY Bracelet and Ring Accessories, Buddhist Prayer Bead Charms

$1.30

Strong Magnet with Hole Square Magnet Block High-Performance Neodymium Iron Boron Countersunk Hole Magnet Steel Magnet Stone Patch

$0.50

New Stainless Steel Solder Wire Lighter Usable High Purity Tin Wire Universal Welding Tool Soldering Wire

$2.90

New Industrial Iron Picker Iron Sucker Magnetic Quick Magnetic Rod G Parts Manual Magnet Nail Sweeper Simple

$386.24

Waveshare MCP23017 I/O Expansion Module Compatible with Raspberry Pi/Micro:bit/STM32/Arduino

$34.00

Voice Playback Module MP3 Prompter Trigger Once Play Once Announcer Compatible with Arduino

$29.00

M03 M04 Water Level Detection Module Sensor, Green Non-Contact Liquid Level Touch Switch

$1.15

MQ-8 Hydrogen Gas Sensor Module

$7.73

MAX30100/MAX30102 Blood Oxygen Heart Rate Wrist Pulse Detection Monitoring Biosensor Module

$5.39

300 SMT Component Soldering Kit High-Intensity Practice Board PCB Skills Competition TJ-56-273

$42.40

Kunlun Coast Industrial Wide-Temperature Transmitter Split Type Temperature and Humidity Sensor JWSK-6

$100.00

Digital + Analog LM386 Sound Detection Sensor Voice Control Switch Audio Waveform Microphone Module

$20.00

NVIDIA JETSON NANO B01 Development Board 4GB Core ORIN Kit AI Artificial Intelligence ROS Motherboard

$899.00

Wildfire Shengteng Mini FPGA Development Board Xilinx Artix-7 XC7A35T/100T/200T A7 Board

$665.00

EchoEar MeowMate PCB Development Board Kit Components Espressif Xiaozhi AI Volcengine Open Source Replica

$0.50

Strong Magnetic Rod with Lifting Ring Industrial Magnetic Force 304 Stainless Steel Stable Mining Iron Removal Magnet

$202.00

Thickened Strong Magnetic Rubber Soft Magnetic Sheet A4 Advertising Magnetic Car Sticker, Flexible Magnet with Adhesive Backing, Magnetic Paper

$17.50

[Corrosion-Resistant] DFRobot Capacitive Soil Moisture Sensor Module Dry/Wet Detection

$35.00

(Loose Parts) Photo-Sensitive Light-Controlled Audio-Visual Alarm Kit with Buzzer and Double-Sided PCB Board for Teaching, Training, and Soldering Practice

$6.80

FarSight WS63 NearLink Development Board Hi3863 HarmonyOS OpenHarmony IoT WiFi Bluetooth BLE

$199.00

Raspberry Pi 4 Case Aluminum Alloy Heat Dissipation

$21.90

Anlixin Solder Paste Solder Cream SMT Patch Mobile Phone Repair Reballing LED Welding High Medium Low Temperature Lead-Free Solder Mud

$25.80

Strong Magnetic Suction Patches, Round Neodymium Magnets with Holes, High-Strength Fixed Suction Force

$2.55

Desktop Soldering Fixture for Mobile Phone Repair - Electronic Holding Stand with Soldering Iron Support and Auxiliary Tools

$11.64

GY-530 VL53L0X Laser Distance Sensor ToF Ranging Time-of-Flight Sensor Module

$12.31

SC7A20H 3-Axis Acceleration Tilt Angle Sensor Module, Inclination and Level Detection with Serial Output

$11.35

N52 Strong Magnet Iron Attractor Round Powerful Magnet Magnetic Stone Sheet Neodymium Iron Boron High-Strength Magnet Rare Earth Magnetic Steel Permanent Magnet

$7.07