Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | DC 5V / 12V |
| Sensor Type | Photoresistor (LDR) |
| Output Mode | Digital Switching (Relay) |
| Adjustable Sensitivity | Yes, via Potentiometer |
| Relay Contact Rating | 10A at 250VAC / 30VDC |
| Response Time | < 100ms |
| PCB Dimensions | 32mm x 14mm |
| Mounting Hole Diameter | 3.0mm |
| Indicator LED | Power and Trigger Status |
| Application Range | Street Lights, Night Lamps, Auto Dimming |
Anonymous
Mar 28, 2026
Rating: 5/5
Exactly what I needed
Fast shipping and the product matches the description. I used it to control a 12V LED strip based on ambient light, and it has been running flawlessly for two weeks now.
Anonymous
Mar 21, 2026
Rating: 4/5
Solid component for the price
Works well with both 5V and 12V systems. The relay feels sturdy. Just make sure your load doesn't exceed the amperage rating, which is standard for this size of module.
Anonymous
Mar 15, 2026
Rating: 5/5
Great sensitivity range
Even in low-light conditions like twilight, this sensor picks up the change perfectly. The potentiometer allows for fine-tuning so it doesn't turn on too early in the evening.
Anonymous
Mar 10, 2026
Rating: 4/5
Good value but instructions could be better
The hardware quality is solid and the relay clicks reliably. I deducted one star because the pinout diagram on the back was a bit faint. Once figured out, it works great for automating my porch light.
Anonymous
Mar 06, 2026
Rating: 5/5
Reliable and compact
I bought three of these for different rooms. They are small enough to fit inside standard junction boxes. The transition from day to night mode is instant without any flickering.
Anonymous
Mar 06, 2026
Rating: 5/5
Perfect for my Arduino project
This module worked exactly as described. The sensitivity adjustment is very smooth, allowing me to set the exact light threshold needed for my garden lights. Wiring was straightforward.
Q: Can this module directly control a 220V AC light bulb?
A: Yes, the onboard relay is rated for 250VAC. However, please ensure the current draw of your bulb does not exceed 10A to maintain safety and longevity.
Q: Does this come with wires included?
A: No, the module is sold as a standalone board without pre-attached wires. You will need to solder your own connection wires or use a terminal block adapter.
Q: Can I use this with a Raspberry Pi GPIO?
A: Yes, but since the Pi GPIO operates at 3.3V logic and this module is optimized for 5V, we recommend using a level shifter or powering the module at 5V while ensuring the signal pin is compatible.
Q: Is the output normally open or normally closed?
A: The default state depends on your wiring, but typically the relay is Normally Open (NO) when no trigger signal is present. You can wire your load to the Common (COM) and NO terminals for standard operation.
Q: How do I adjust the light sensitivity threshold?
A: There is a blue potentiometer on the PCB. Use a small screwdriver to rotate it clockwise to increase sensitivity (trigger in brighter light) or counter-clockwise to decrease it (trigger only in darkness).
![[Group 13 Full Payment Pre-order] Thin Mint Fufu Hawthorn Berry Mint Chocolate Lolita Dog-Short Fishbone Puffy Skirt](https://www.gosteppe.com/cache/small/product/269377/legacy-main-2abe2d26b4ec6ed6eaec28bf.webp)
[Group 13 Full Payment Pre-order] Thin Mint Fufu Hawthorn Berry Mint Chocolate Lolita Dog-Short Fishbone Puffy Skirt
$25.00
Wenxin Tang Cao Quan Stele Han Clerical Script Cards - Beginner Calligraphy Practice for Adults, Brush Writing Copybooks
$136.00
'Eki (Station)' by Mariya Takeuchi - Mr. Chui Saxophone Trio Precise Transcription Service
$37.00
Pad Printing Machine Accessories: 4*4 Aluminum Ink Cup, Ink Tray, Ink Container, and Ink Trough
$40.00
KUDIS Commercial & Industrial Vacuum Cleaner - High-Power Wet/Dry Unit for Workshop Dust, Factory Floors, Warehouses, and Concrete Surfaces
$5,200.00
Rubber Speed Bump End Cap Heavy-Duty 1 Pack
$72.46
Front Wiper Arm Assembly for Citroën C-Elysée, Xsara Picasso, Peugeot 307/301
$35.00
Underbite Corrector Case - Portable Magnetic Lanyard Storage Box for Frankel Appliance and TB Palatal Expander
$22.70
Car Tire Stone Removal Tool, Multi-Function Hook for Picking and Extracting Stones from Treads
$6.43
Outdoor Lamp Stand for Camping, Lantern Holder Pole for Street Vending and Night Fishing
$13.89
Waste Removal and Paper Stacking Machine, Automatic Paper Collection and Counting Receiver for Carton Printing Equipment, Carton Factory Machinery
$6,400.00
Sheepskin Baby Rattle - Chewable Traditional Handmade Shaker Bell, Intangible Cultural Heritage Essential for Newborn Care
$57.00
Zhizhi Study Room 'Small Pot Sky' Brush Washer - Traditional Handmade Glass with Lost-Wax Method, Silk Luster, Double-Compartment Water Vessel
$457.00
Zao Boshi Insulated Food Cart - Programmable Banquet Warmer for Buns, Breakfast Items, and Hotel Dry/Wet Dishes
$11,566.00
![Lichuan JK [Blood Oath] - Original Authentic Japanese Dark Style Embroidered Sailor Suit - Spring/Autumn Set](https://www.gosteppe.com/cache/small/product/269363/legacy-main-0b86f0b7795c15ee2c8be0d3.webp)
Lichuan JK [Blood Oath] - Original Authentic Japanese Dark Style Embroidered Sailor Suit - Spring/Autumn Set
$59.00
Sink Storage Rack Stainless Steel No-Drill Kitchen Sponge Steel Wool Cloth Pot Lid Organizer Wall-Mounted Drain Rack
$4.93
Sketch Blending Stump Set for Artists - Detail Highlight and Shadow Smudging Tools with Replacement Tips
$14.80
Softening Agent for Board Arcs Melamine Softener Eco-Friendly Board Paint-Free Board Whole House Customization Arc Softener
$9.30
Car Tire Stone Removal Tool - Hook Picker for Cleaning Pebbles from Vehicle Treads
$3.90
Electrical Box with PLC System and VFD for Fans and Pumps
$2,519.00
Zunjue Watercolor Sketchbook 300g Fabric-Covered Journal – Portable Acrylic Marker Book, 100% Cotton Flip-Style Concertina Drawing Paper
$13.70
French Imported Arches Watercolor Paper, Handmade Cotton Pulp 300g Full/Half/4K/8K/16K/32K Rough/Medium/Fine Grain, 185g Cotton Pulp for Postcards and Watercolor Books
$20.80
![[Official Authentic] Zichao Bear Wanda Cinema Popcorn Acrylic Keychain Plush Doll Cute Toy](https://www.gosteppe.com/cache/small/product/269355/legacy-main-ae40bf0d9a6007e2f30a9130.webp)
[Official Authentic] Zichao Bear Wanda Cinema Popcorn Acrylic Keychain Plush Doll Cute Toy
$25.40
Heidelberg Printing Press Automatic Blanket Wash Cloth - Non-Woven Cleaning Fabric, 500m Roll
$3,185.00
Bucket Pack Natural Wood Colored Pencils Water-Soluble for Kids Coloring and Doodling
$6.65
Chunfei Grocery Store Yunm'an GR02 Gravel Bike - Thru-Axle Disc Brake, Lightweight Touring with Multiple Rack Mounts
$6,444.00
Variable Frequency Drive Power Board ZPOW-591 for ACS880
$2,200.00
Professional Sketching Eraser Kit - Blending Stumps, Sponges, and Paper Tortillons for Highlight & Shadow Correction
$3.90
Weighted Water Bag with Handle, Thickened PV Mesh Gravity Ballast for Banner Stand Fixation (8KG)
$35.10
Ultra-Fine Purification Lint-Free Cloth Cleaning Cloth Lens Wipe High Quality 0730 Water-Absorbing Dust Removal UV Nozzle 100 Sheets
$96.00
![[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)
