Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | 5516 Photoresistor Module |
| Pin Count | 4-Pin Interface |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switching (DO) |
| Detection Component | Photoresistor (LDR) |
| Adjustability | Sensitivity Potentiometer Included |
| Indicator | Green Power LED, Red Output LED |
| Board Dimensions | 32mm x 14mm |
| Mounting Hole Diameter | 3.0mm |
| Application | Light Control, Arduino, Raspberry Pi Projects |
Anonymous
Mar 27, 2026
Rating: 5/5
Perfect for my night light project
This sensor module works exactly as described. The sensitivity adjustment is very smooth, allowing me to set the exact lux level where the switch triggers. Easy to connect to my Arduino Uno.
Anonymous
Mar 09, 2026
Rating: 4/5
Good value, clear instructions needed
The hardware quality is solid and the response time is fast. I deducted one star because it didn't come with a pinout diagram, but a quick search online solved that. Works great for automation.
Anonymous
Mar 08, 2026
Rating: 5/5
Great starter sensor
As a beginner, I found this very easy to use. The potentiometer lets you test thresholds without changing code immediately. Excellent product for learning electronics.
Anonymous
Mar 07, 2026
Rating: 4/5
Does the job well
Solid build quality. The LEDs are bright enough to see status clearly but not blinding. Just ensure you supply the correct voltage to avoid damaging the comparator chip.
Anonymous
Mar 06, 2026
Rating: 5/5
Compact and sensitive
Small footprint fits perfectly on my custom PCB. The photoresistor reacts quickly to changes in ambient light. Highly recommended for anyone building light-activated switches.
Anonymous
Mar 01, 2026
Rating: 5/5
Reliable for school robotics
Bought five of these for a class project. All of them worked out of the box. The digital output makes coding very simple compared to reading analog values directly.
Q: How do I adjust the sensitivity?
A: There is a blue potentiometer on the back of the board. Rotate it clockwise or counter-clockwise while exposing the sensor to your target light condition until the red output LED toggles as desired.
Q: Does this module provide an analog output or only digital?
A: This specific 4-pin model provides a digital output (DO) indicating whether the light level is above or below the threshold. It does not expose the analog signal on the standard 4 pins.
Q: Can this detect infrared light?
A: The photoresistor is primarily sensitive to visible light. While it may react slightly to strong near-infrared sources, it is not optimized for IR detection. We recommend an dedicated IR sensor for those applications.
Q: Is this compatible with 3.3V systems like ESP32?
A: Yes, the module operates comfortably within the 3.3V to 5V range, making it fully compatible with ESP32, ESP8266, and Raspberry Pi GPIO pins.
Q: What is the maximum current this board can switch?
A: The onboard comparator output is designed for logic signals (microcontroller inputs) and should not be used to drive high-current loads directly. Please use a relay or transistor for driving motors or high-power LEDs.
Iers Electric Airbrush/Marker Pen Wireless Handheld Portable for Gundam Model Painting
$322.00
Commercial Glass Food Warmer Display Case for Egg Tarts, Hamburgers, Fried Chicken, and Youtiao - Countertop Heating Cabinet for Catering
$1,795.00
Premium Used Tires Removed from Vehicles Sizes 155 165 175 185 195 205 215 225
$54.00
Storage Bag Compatible with Dyson/Laifen Hair Dryer Curling Iron Straightener Double-Layer Portable Travel Hand-Carry Case
$48.40
Chushinmi - Silicone Collapsible Dish Drying Rack, Kitchen Organizer, Sink Utensil Holder for Bowls and Chopsticks
$61.90
Wenxin Tang Ultra-Clear Zhi Yong Thousand Character Classic Regular Script Calligraphy Cards - Boxed Practice Sheets for Medium-Sized Brush Writing
$40.80
Cute Pig Pot Lid Holder and Drainage Mat, Multi-Function Heat Insulator and Cutting Board Rest
$2.01
![[Damai Micro-Needle Hair Transplant Patent] Top Scalp Thinning Treatment | High-Density 200 Grafts Micro-Needle Transplant](https://www.gosteppe.com/cache/small/product/269847/legacy-main-921c5365abd34b2597668ec5.webp)
[Damai Micro-Needle Hair Transplant Patent] Top Scalp Thinning Treatment | High-Density 200 Grafts Micro-Needle Transplant
$199.00
Song Dynasty Guo Xi's 'Traveling in Snowy Mountains' Hanging Scroll - Study Copy Template, Art Core, Landscape Painting, Zen Decorative Art, HD Collectible
$12.80
Drain Basket for Wet/Dry Separation with Hanging Vegetable Strainer Rack
$111,978.00
Custom Mesh Lid Organizer Bag for Pelican 1535 Case - Laptop Compartment
$118.70
Home LED High-Power Rechargeable Flashlight, Multi-Purpose Long-Range Portable Ultra-Bright Mini Torch
$20.60
Accsoon CineEye M7 Pro 4K Wireless Video Transmitter and Monitor with 7-inch HDMI/SDI Dual-Transmission Screen
$99.00
Stainless Steel Sink Rack Kitchen Organizer Over-Sink Dish Drying Rack with Utensil Holder
$48.00
Specialized Vegetable Growing Box - Foam Balcony Planter, Rectangular Plastic Pot for Home Gardening
$41.70
Thickened Resin Vegetable Planter Box - Rectangular Plastic Balcony Pot for Growing Vegetables and Flowers
$101.00
SEATOSUMMIT Outdoor Travel Portable Waterproof First Aid Kit Wilderness Survival Personal Medical Folding Storage Bag
$79.00
Commercial Gas Storage Water Heater, Condensing Low-NOx Boiler, Fully Automatic Natural Gas Hot Water Furnace for Hotels
$13,175.00
SH1.0/1.25/ZH1.5/PH2.0XH2.54 Electronic Wire Connector Terminal Cable 2P-12P
$0.04
VFD Capacitor ALS30A1363KJ/ALS30C1024NP/ALS30C1023NP
$500.00
200X18DNNmm L Shape Stainless Stel Corern Brace Repeair Ang
$88.28
Quilling Paper Set Gradient Color Tool Kit Handmade Quilling Strips Basic Packaging for Fine Line Coloring
$38.00
Standard Ou Kai Calligraphy Beginner's Sun Tzu's Art of War & Thirty-Six Stratagems Small Regular Script Brush Copybook Xuan Paper Long Scroll for Tracing
$18.00
Mold Release Oil for Incense Beads and Tags - Colorless, Odorless, Food-Grade Auxiliary Release Agent
$8.00
Tafara Aromatherapy Matches - Premium Extended-Length Safety Matches for Incense Burners (20 Count)
$23.80
Magnetic Sponge Holder and Steel Wool Rack for Sink, Stainless Steel No-Drill Kitchen Organizer
$9.94
Touchmark Square Sketchbook for Acrylic Markers - Thick Paper Art Journal for Quick-Dry, Smudge-Free Drawing
$10.80
Mo Hao Detail Brush Set, Goat Hair Liner, Wolf Hair Round/Flat Brushes for Oil Painting, Art & Gouache
$78.00
Authentic Military-style Socks for Men - Summer and Winter Anti-odor Sweat-absorbing Mid-calf Black and Navy Blue Training and Sports Socks
$23.80
Alliance Authorized Plaque - Yoga Alliance RYT, Pilates Alliance, International Yoga Alliance, China Yoga Alliance
$380.00
![[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)
