Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital Switching Output (0 and 1) |
| Pin Configuration | 3-Pin or 4-Pin Options |
| Comparator Chip | LM393 |
| Sensitivity Adjustment | Potentiometer Included |
| PCB Size | 3.2cm x 1.4cm |
| Mounting Hole Diameter | 3mm |
| Indicator LED | Power and Output Status LEDs |
| Compatible Platforms | Arduino, Raspberry Pi, STM32 |
| Application Range | Light Control, Night Lights, Alarm Systems |
Anonymous
Mar 28, 2026
Rating: 4/5
Compact and effective
Small footprint fits well on my robot chassis. The only minor issue is that the soldering pads are a bit small for thick wires, but standard jumper wires fit fine.
Anonymous
Mar 21, 2026
Rating: 5/5
Perfect for Arduino Projects
This module works flawlessly with my Arduino Uno. The sensitivity potentiometer makes it very easy to calibrate for different lighting conditions. Great value for the price.
Anonymous
Mar 11, 2026
Rating: 5/5
Reliable light switch
Using this to trigger an LED strip when the room gets dark. The LM393 comparator provides a stable signal without flickering. Highly recommended.
Anonymous
Mar 11, 2026
Rating: 5/5
Great for classroom demos
Bought five of these for a university project. All of them worked out of the box. The digital output is clean and easy to read with a microcontroller.
Anonymous
Mar 07, 2026
Rating: 4/5
Good sensor, clear instructions needed
The hardware is solid and responds quickly to light changes. I wish the pinout diagram was clearer on the packaging, but a quick online search solved that. Works as expected.
Anonymous
Mar 07, 2026
Rating: 5/5
Excellent sensitivity range
I was surprised by how wide the adjustment range is on the potentiometer. You can set it to trigger in broad daylight or only in near-total darkness. Very versatile.
Q: Is the 4-pin version different from the 3-pin version?
A: Functionally they are identical. The 4-pin version simply includes an extra VCC or GND pin for easier breadboarding convenience. You only need to connect three wires to make it work.
Q: Does this module provide an analog output or just digital?
A: This specific module provides a digital switching output (HIGH/LOW) via the LM393 comparator. If you need analog values, please look for our LDR analog sensor variant.
Q: How do I adjust the sensitivity threshold?
A: Use the blue potentiometer on the board. Turn it clockwise to increase sensitivity (trigger in brighter light) or counter-clockwise to decrease it (trigger only in darker conditions). Use a small screwdriver for adjustment.
Q: Can I power this directly from a 5V USB source?
A: Yes, the operating voltage range is 3.3V to 5V, so connecting it to a standard 5V USB power source is perfectly safe and recommended.
Q: What is the maximum current the output pin can sink?
A: The output pin can typically sink up to 20mA, which is sufficient to drive a small LED directly. For higher loads like relays, we recommend using a transistor or driver circuit.
UHT Ultra-High Temperature Sterilizer, Room-Temperature Set Yogurt Production Line, Yogurt Processing Equipment, Stirred Yogurt System
$80,640.00
Professional Sketch Blending Kit for Art Students: Gray Tone Pencils, Sponges, Stumps, and Erasers
$4.17
Custom Solid Wood Signboard with Engraved Lettering, Advertising Carved Plaque for Homestays, Tea Rooms, Studios, Wooden Entrance Hanging Sign
$16.90
MOKO Stainless Steel Expandable Dish Drainer - Multi-Function Kitchen Sink Rack for Bowl and Plate Storage
$28.00
WoSporT Factory Direct WST Safety Case 32cm (12.6 inch) - Dustproof, Waterproof, and Impact-Resistant Tool Box
$95.00
South Korea DIO Dental Implant / Implant + Abutment + Crown
$1,580.00
40cm Extended Drill Attachment with Scouring Pad Head for Polishing, Rust Removal, and Marble Countertop Cleaning
$60.00
Authentic Ou Style Tian Kaishu Thousand Character Classic Calligraphy Card for Adult Practice, High-Definition Coated Paper
$55.10
Zer0g Ultra-Light 14g Backpack Waterproof Liner - Polycro Odor-Barrier Pack Liner for Hiking and Trekking
$21.20
Touchmark Liquid Acrylic Markers with Soft Tips, Specialized for Elementary School Art, Ideal Birthday Gift for Children
$18.90
Paper Blending Stump for Sketching - Professional Art Tool with Blade for Highlights, Pastels, and Oil Pastels
$3.74
Wen Zhengming Small Regular Script Love Lotus Essay Brush Tracing Practice Copybook Calligraphy Paper Copying Custom Wholesale for Beginners
$8.80
Heavy-duty Industrial Scouring Pad Roll with Aluminum Oxide for Stainless Steel Polishing and Rust Removal
$57.52
1.06m Leather Slitting Machine – Wide-Range Strip Cutter for Leather, Luggage, and Rubber Materials
$16,250.00
Ceramic Double-Boiler Steaming Bowl with Lid – Ideal for Eggs, Bird's Nest, Custard, and Soup for Home or Commercial Use
$21.11
![[Ya Que You Sheng] DT900 PRO X Calibration File V2 Version EQ Equalization](https://www.gosteppe.com/cache/small/product/269040/legacy-main-a3c0c55ffaafe89c05afced1.webp)
[Ya Que You Sheng] DT900 PRO X Calibration File V2 Version EQ Equalization
$15.00
Ceramic Rabbit Egg Holder, Creative Irregular Egg Stand, Home Breakfast Small Dish, Craft Gift Ornament
$44.78
Hot-Selling Wire Money Tree Bonsai Base – Ceramic Pot for Wealth Attraction Incense
$37.00
Maike Outdoor Sports Waterproof Backpack Wet-Dry Separation Ski Bag Fishing Creek Fins Multi-Function Gear Storage
$152.00
Viral NFC Chip Stickers for Music Wall - Adhesive Read/Write Tags for Song Scanning, Cards, and Photo Frames
$2.38
Rechargeable Generation 2 Personal Air Purifier - Safe Portable Electric Fan for Travel Commuting and Flights
$181.00
Integrated Sink Splash Guard with Silicone Drain Mat - Auto-Draining Countertop Organizer
$23.30
Ultra-Light Aluminum Camping Light Pole – Foldable Mini Lamp Stand for Outdoor Picnics and Tabletop Use
$8.33
bimoz Under-Desk Cable Organizer No-Drill Shelf for Home Office Socket Strip Router Wire Data Cable Fixer Minimalist Wire Winder Dual-Side Mount Ventilated Design
$40.80
Extended Deep-Cut External Thread Tool Holder with Relief Groove for Swiss-Type Lathe HKFF42R6001
$15.50
Meiao Dental Imported Dental Implant Package, Swiss ITI Straumann Implant Abutment, False Teeth, Filling, and Planting
$14,188.00
Assorted Colors Kids' Painting Crayons - Washable Oil Pastels in 12, 18, 24, or 36 Colors for Graffiti and Coloring
$2.47
Fruit and Vegetable Slicer - Stainless Steel Commercial Electric Multi-Function Shredder for Radish, Potato, Cucumber, Pepper, Automatic
$2,880.00
CAAS-Developed Granular Insecticide and Fungicide for Vegetable Gardens – Soil Pest Control and Fertilizer for Enhanced Vegetable Growth and Yield
$13.50
Marie's C6823 Sketch Blending Stumps (3-Pack), Professional Charcoal and Pastel Smudging Tools for Art Students and Beginners, Hard/Small/Highlight Set on Newsprint
$7.48
![[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range](https://www.gosteppe.com/cache/medium/product/74667/legacy-main-4da8cadc5fc82afe91b124e3.webp)
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
