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.
MOMA Small Ma 4K Wireless Video Transmission System with HDMI and SDI for Filming and Live Streaming
$1,999.00
Youzhao Pai Creative Retro 3D Embossed House Number Plate – Custom Door Signs for Villas, Commercial Spaces, and Homes
$200.00
Tianzheng DZ15LE-100/3N901T 100A Transparent Leakage Circuit Breaker, Molded Case Circuit Breaker 3901T 63A
$278.00
![[Daimai Holds Micro-Needle Hair Transplant Patent] Little Red Cap Hydro Glow | Scalp Hydration and Repair](https://www.gosteppe.com/cache/small/product/270424/legacy-main-ecbdc6ee4688639f4a8ef150.webp)
[Daimai Holds Micro-Needle Hair Transplant Patent] Little Red Cap Hydro Glow | Scalp Hydration and Repair
$880.00
Pelican Rolling Case pelican1560 - Waterproof Shockproof Safety Case for Photography Equipment and Instruments
$1,550.00
Disipulai Hot Air Circulation Vertical Food Warmer Display Cabinet - Adjustable Temperature Countertop Cooked Food Warming Equipment
$2,023.00
Complete Pasteurization Production Line for Pomegranate, Grape, Orange, Apple Juice, and Mare's Milk
$6,048.00
Portable Tire Stone Removal Tool - Essential Handheld Hook for Car Owners
$13.73
Factory Direct Longan 160 Curved Hot Stamping Machine Fully Automatic Hot Foil Printer Pneumatic Heat Press Leather Embossing Machine
$10,000.00
Bean Sprout Germinator Tray, Hydroponic Vegetable Growing Container, Soil-Free Pea Sprouting Pot
$14.06
TOPTOY Crayon Shin-chan Memory Echo Series Blind Box - Anime Figure Collectible Toy and Birthday Gift
$47.20
Natural Lightning Cat's Eye Yellow Tiger Eye Loose Beads, Single Crystal Beads for DIY Bracelets and Accessories
$3.91
Pirelli Tire 235/55R19, Original Equipment for Mercedes-Benz GLC, Genuine Tire Compatible with Audi/Land Rover/etc.
$512.00
Biliansheng Hair Transplant: No-Shave Hairline Restoration, Top Thinning Density Enhancement, Nationwide Chain
$9,999.00
Luru Authentic 15-Note Steel Tongue Drum - Professional Grade for Beginners, Adults, and Children
$500.00
![MOOCAT [Postage Stamp Stub] Hand-Drawn Blank Irregular Wood Pulp Fine-Texture Paper for Cyanotype, OC Signing, and Collage](https://www.gosteppe.com/cache/small/product/270412/legacy-main-3037a70329c5379f7064bc16.webp)
MOOCAT [Postage Stamp Stub] Hand-Drawn Blank Irregular Wood Pulp Fine-Texture Paper for Cyanotype, OC Signing, and Collage
$9.90
Used Car Tires - Sizes 155/165/175/185/195/205/215 for 13/14/15/16 inch Rims
$140.00
Pin Puller Extractor Mechanical Repair Tool Bearing Puller and Locating Pin Extractor
$76.50
Water Brush Pen Set with Large Capacity - Essential Tools for Beginners Using Gouache, Solid Watercolor Paints, and Line Drawing; Perfect for Art Students
$32.00
C9335 Automotive Brake Disc Lathe – Resurfacing, Boring, Grinding & Polishing Machine
$16,005.00
Jaguar Tire Lug Nuts Compatible with XE/XF/XJL/F-TYPE/F-PACE - Wheel Hub Screw Caps for Modification
$118.00
Three-Hook Tire Stone Removal Tool, Wheel Groove Cleaner for Removing Stones from Vehicle Tires
$4.80
Pad Printer Accessories: 4-Inch Blade Clamp, Blade Holder, and Doctor Blade Assembly
$5.40
3M Industrial Scouring Pad 7447C, Metal Rust Removal, Stainless Steel Brushing and Polishing Cloth
$4.00
Qinghe Blazing Rose Series
$1,580.00
Cheddar Cheese Production Line, Front-End Processing and Deep Processing Machinery, Mozzarella Cheese Equipment
$25,480.00
MGQ Konjac Noodle Bubble Cleaning Machine, Fully Automatic Soaking and Lifting Washer
$17,555.40
Industrial Large Meat Grinder Fresh Meat Mince Chopper Fruit Vegetable Crusher Meat Grinding and Mixing Integrated Meat Filling Mixer
$32,030.00
Zhuolide D-302 UV Glue - Invisible Adhesive for Transparent Glass, Metal, Coffee Tables, and Crystal Glass, 250g Large Capacity
$130.00
Hell Training Rock Guitar by Shinichi Kobayashi: Electric Guitar Tutorial for Speed Playing
$106.00
![[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)
