Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switching Output (0 and 1) |
| Detection Range | Adjustable via Potentiometer |
| Comparator Chip | LM393 |
| Pin Configuration | 3-Pin and 4-Pin Compatible |
| PCB Size | 32mm x 14mm |
| Mounting Hole Diameter | 3.0mm |
| Indicator LED | Power and Trigger Status LEDs |
| Compatibility | Arduino, Raspberry Pi, ESP8266, ESP32 |
| Package Contents | 1x Photoresistor Sensor Module |
Anonymous
Mar 29, 2026
Rating: 4/5
Great value, clear documentation needed
The hardware quality is solid for the price. It took me a moment to figure out which pin was which since the silkscreen was a bit faint, but once connected to my ESP32, it worked flawlessly.
Anonymous
Mar 29, 2026
Rating: 4/5
Good for line following robots too
While marketed for light, we successfully used these for line following by reflecting an IR LED off the surface. The sensitivity adjustment is key here. Would buy again for classroom kits.
Anonymous
Mar 28, 2026
Rating: 5/5
Easy to use for beginners
As someone new to electronics, I appreciated how simple this module is to integrate. Plenty of tutorials online match this specific LM393 setup. No complex coding required.
Anonymous
Mar 20, 2026
Rating: 5/5
Compact and effective
Small footprint fits perfectly on my custom PCB. The soldering points are well-defined, and the component placement leaves enough room for wires. Highly recommended for prototyping.
Anonymous
Mar 10, 2026
Rating: 5/5
Perfect for my Arduino night light project
This sensor works exactly as described. The potentiometer makes it very easy to calibrate the sensitivity threshold. I used it to trigger an LED strip when the room gets dark, and the response time is instant.
Anonymous
Mar 09, 2026
Rating: 5/5
Reliable sunlight detection
I bought three of these for a solar garden lighting system. They handle outdoor conditions well inside their enclosures. The digital output is clean and doesn't fluctuate unnecessarily.
Q: Is the photoresistor replaceable if it breaks?
A: Yes, the photoresistor is through-hole soldered. If you have soldering skills, you can desolder the existing one and replace it with a standard GL5528 or similar LDR.
Q: What is the maximum current this sensor can switch?
A: The onboard LM393 comparator output is designed for signal logic, not high-current loads. It should only be connected to a microcontroller input pin. To drive motors or high-power LEDs, please use a relay or transistor circuit.
Q: Does this module provide an analog output or only digital?
A: This specific module provides a digital switching output (HIGH/LOW) based on the threshold you set with the potentiometer. It does not expose the raw analog signal from the photoresistor directly on the standard pins.
Q: How do I adjust the sensitivity level?
A: There is a blue potentiometer on the back of the PCB. Rotate it clockwise or counter-clockwise while exposing the sensor to your target light condition until the status LED triggers at your desired brightness level.
Q: Can I power this with 3.3V logic from an ESP8266?
A: Yes, the module operates comfortably within the 3.3V to 5V DC range, making it fully compatible with 3.3V microcontrollers like the ESP8266 and ESP32.
![[Dental Implant Chief Specialist] Implant Examination and Treatment Planning](https://www.gosteppe.com/cache/small/product/268856/legacy-main-c23225af0fb2c31bbd4f46a1.png)
[Dental Implant Chief Specialist] Implant Examination and Treatment Planning
$9.90
Wall-Mounted Toilet Storage Rack - No-Drill Bathroom Shelf Organizer for Above the Toilet
$26.07
New Wireless Car Vacuum Cleaner, High Suction Home Use, Compact Handheld Silent High-Power Vacuum
$114.00
Electric Watercolor Spray Pen Children Hand-painted Color Pa
$47.55
Cement-Specific Pigment Powder for DIY Crafts, Gypsum Dye for Creative Flower Pot Coloring
$3.83
9 Garrett iCover 270 Twin 5RX Restech 072.6S28 Turbocharger 20-Dragon 0TXD GT 37042
$6,755.00
Household Small Range Hood, Portable USB Desktop Fume Extractor for Living Room Hot Pot and BBQ Odor Removal, Mini Smoke Absorber
$41.00
Retainer Storage Box, Clear Case for Invisible Aligners with Mirror, Portable Orthodontic Appliance Carrier, Instagram Style
$13.40
Hairline Transplant | No-Shave Hair Transplant | 1-1500 Units Long Hair Planting for Natural Flow and Volume - Department Director Service
$25,800.00
Zhong Yao Xuan Shi Biao Small Regular Script Hard Pen Copybook, 1.8cm Column Width, Tear-Off Sheets for Precise Tracing – Source of Regular Script
$29.70
Chunfei Grocery Store Yun'an GR02 Gravel Bike Thru-Axle Disc Brake Lightweight Touring with Multiple Rack Mounts
$8,974.00
Anti-Tangle High-Strength Grade 100 Lifting Chain for Industrial Hoisting
$776.44
DIY Rose Essential Oil Handmade Soap Customization
$35.00
Adjustable Height Simple Storage Shelf - Wooden and Iron Bookcase, Steel-Wood Supermarket Display Rack
$256.00
DIY Handmade Soap Mold - Carnation Flower Rectangular Silicone Mold for Homemade Soap, Mother's Day Gift
$14.30
Fried Chicken Warmer Cabinet with Heat Lamp Small Single-Layer Insulated Box for Pies Youtiao Chestnuts and Roasted Sweet Potatoes Display Case
$500.00
Dried & Preserved Flower DIY Kit for Scented Candles – Ocean Style for Festivals, Team Building, and Workshops
$6.83
304 Stainless Steel Chain, Thickened Industrial Seamless Short/Long Link Chain for Lifting, Swing, or Dog Leash
$1.50
Large Bucket 502 Glue, Strong Instant Adhesive, Gold Material 502 Dry Glue for Leather, Metal, Furniture, and Plastic Bonding by Manufacturer
$1,893.00
Rectangular Plastic Vegetable Planter for Balcony - Durable Home Gardening Pot
$12.90
Chinese Painting Line Drawing Copybook, Gongbi Sketch Template, Large-Scale Tracing Album, Ancient Style Brush Control and Line Practice Book
$7.48
German Continental Tires 225/45R17 Run-Flat, 19-Inch Original Authentic with Full Tread Patterns
$380.00
Dynamic Sheet Music Simplified Notation Accompaniment for Electric Wind Instrument Saxophone Hulusi Ocarina Flute Bamboo Flute
$10.00
LL Industrial Lint-free Wiping Paper - Oil and Water Absorbent Non-woven Fabric (White/Blue Large Roll)
$185.82
Continental Quiet Used Car Tires 225/235/245/255/265-35/40/45/50 R17/18/19/20/21/22/23
$284.00
Negotiable Price: Siemens Load Cell 7mh4106-5ec11, Brand New Unused, Contact for Price Negotiation
$1,332.00
Premium Over-Toilet Storage Organizer, Wall-Mounted Bathroom Shelf, No Drilling Required, Multi-Function Toilet Rack
$31.76
Model 2000 Large Commercial Vegetable Cutter for Slicing, Dicing, and Cutting Leafy Greens and Kimchi
$11,000.00
Aromatherapy Candle Tool Set - Includes Igniter, Snuffer, Wick Trimmer, Flame Extinguisher Cover, and Rotating Carousel Ornament
$2.55
onlycook 304 Stainless Steel Kitchen Rack with Narrow Edge for Sink, Dishcloth Drainer, and Sponge Basket
$36.50
![[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)
