Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | A3144 |
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital Switch (Open Collector) |
| Compatibility | Arduino, micro:bit, Raspberry Pi |
| Sensing Range | Approx. 10mm |
| LED Indicator | Yes (Power and Output Status) |
| Mounting Hole Diameter | 3mm |
| PCB Dimensions | 32mm x 14mm |
| Application | Speed Measurement, Counting, Position Detection |
| Package Includes | 1x Hall Sensor Module |
Anonymous
Mar 22, 2026
Rating: 4/5
Easy to use for beginners
As someone new to electronics, I found this very straightforward to connect. The three pins are clearly labeled. Just remember you need a pull-up resistor if your board doesn't have one internally.
Anonymous
Mar 18, 2026
Rating: 5/5
Solid build quality
The PCB looks clean and the soldering is good. No issues with noise or false triggers in my testing environment. Highly recommended for hobbyists.
Anonymous
Mar 17, 2026
Rating: 4/5
Great value for learning
Bought this for a school project involving the micro:bit. It was easy to wire up and detect magnets. Only giving 4 stars because the documentation could be slightly better, but plenty of examples online.
Anonymous
Mar 09, 2026
Rating: 5/5
Exactly as described
Fast shipping and the product matches the description perfectly. Works great for counting revolutions on my 3D printer fan upgrade.
Anonymous
Mar 07, 2026
Rating: 5/5
Perfect for my RPM counter project
This module worked flawlessly with my Arduino Uno. I used it to measure the speed of a small DC motor, and the readings were consistent. The LED indicator is very helpful for debugging.
Anonymous
Mar 04, 2026
Rating: 5/5
Reliable and sensitive
I've tested several hall sensors, and this A3144 module is very responsive. It detects the magnet from a decent distance, which helps when mounting it inside a chassis.
Q: Does this module work directly with 3.3V logic like the ESP32?
A: Yes, the module operates within a 3.3V to 5V range, making it fully compatible with 3.3V microcontrollers like the ESP32 and micro:bit without needing level shifters.
Q: Is a magnet included in the package?
A: No, the package includes only the Hall sensor module. You will need to provide your own magnet for testing or integration into your project.
Q: Can I use this to detect gear teeth on a metal wheel?
A: This specific module detects magnetic fields, not metal directly. To detect gear teeth, you would need to attach a small magnet to the rotating gear or use a ferrous metal detection setup with a magnet placed behind the sensor.
Q: What is the maximum current this sensor can switch?
A: The A3144 chip typically handles up to 25mA. For driving higher current loads like relays or bright LEDs, we recommend using a transistor or MOSFET between the module output and the load.
Q: How do I connect this to an Arduino?
A: Connect the VCC pin to 5V, GND to Ground, and the OUT pin to any digital input pin on your Arduino. You can then read the HIGH/LOW state in your code to detect the presence of a magnet.
Large Size Thickened Felt Mat for Calligraphy, Wool Felt Pad for Brush Practice, Traditional Chinese Painting Desk Mat
$13.50
Creative Studio Sign Custom Door Plate Company Billboard LOGO Design Storefront Display
$119.00
Router Storage Box, Cable Organizer, WiFi Set-Top Box Stand, Gigabit Broadband Shelf with Wall Mount
$23.60
Baby Rattle with Teether for 0-6 Month Newborns, Sand Shaker and Hand Drum for Visual and Auditory Tracking
$10.50
Splicable Folding Food Warmer Partition Temperature Control Insulation Plate Hot Dish Plate Induction Cooker Plate Constant Temperature Heating Food Warmer Table Mat
$315.00
Marie's Kneaded Eraser Cotton for Sketching, Student-Use Blending Stump, Makeup Sponge for Art Students, Paper Blending Tool, Soft Absorbent Water-Drop Sponge Ball for Sketching
$8.33
Soft Cheese Processing Equipment, Lab-Type Cheese Stretching and Mixing Machine, Multi-Function Hot Water Stretching Unit
$210,210.00
Imported IKO Needle Roller Bearings TAF121912, 121915, 121916, 142212, 142216, 142220
$26.00
Portable Watercolor Sketchbook – 100% Cotton Mini Square Pocket Book for Travel, On-the-Go Sketching, Tear-Off Art Pages
$10.90
Dongguan Rotary Pad Printer Manufacturer - Fully Automatic 4-Station Pad Printer for Plastic, Metal, Text, Patterns, and Logos
$500.00
Custom Solid Wood Plaque, Antique-Style Wooden Sign with Engraving, Shop Signboard, Couplet, Carved Wood Plaque
$17.00
No-Drill Over-Toilet Storage Rack for Bathroom Wall Gap Behind Tank
$24.55
Upgraded Breakfast Food Warmer Display Cabinet - For Fried Chicken, Pies, Roasted Meat, with Crisp Preservation and Constant Temperature Control
$4,920.00
Butterfly Silicone Mold for Handmade Soap, Fondant, Chocolate, and Ice Cream
$14.00
Professional Music Services: Harmony Arrangement, Vocal Recording, Sheet Music, Mixing & Campus Orchestration
$20.00
Chunfei Grocery Store Yunan GR02 Gravel Bike Thru-Axle Disc Brake Light Load V Travel Many Rack Mounts
$6,445.00
![Pad Printing Silicone Head Mold with Blister Cover, Long Crystal Mold for Pad Printing Machines [Long Strip]](https://www.gosteppe.com/cache/small/product/270328/legacy-main-ca45adf23667d6b16fd9f3c4.webp)
Pad Printing Silicone Head Mold with Blister Cover, Long Crystal Mold for Pad Printing Machines [Long Strip]
$5.00
Remote-Controlled Automatic Fog Cannon for Xinjiang and Inner Mongolia Mines - Explosion-Proof, Anti-Freeze, Noise-Reducing Dust Suppression Sprayer for Coal Yards
$6,000.00
UV Glue for Bonding PET to Melamine Board, PC to Melamine Veneer, Invisible Adhesive for Glass Sliding Doors with UV Curing
$326.00
Mobile Welding Fume Purifier, Industrial Soldering Smoke Extractor, Welding Fume Collector and Exhaust Machine
$2,760.00
Upgraded Commercial Constant-Temperature Heated Display Cabinet for Fried Chicken, Meat Pies, and Breakfast Pastries
$5,510.00
2025 New Waterproof Swim Bag with Dry-Wet Separation - Lightweight Gym and Beach Tote for Men and Women
$14.80
4-Piece Canvas Stretching Tool Set with Wide-Jaw Pliers, Manual Staple Gun, and Starter Tool for Oil Painting Frames, Includes Tutorial
$10.20
Construction Anti-crack Steel Wire Mesh 4mm for Concrete Floors - Thickened Galvanized Iron Grid
$10.59
Japanese Dopamine Style Portable Retainer Case with Mirror - Storage Box for Invisible Aligners and Dentures
$16.00
Traditional Rattle Drum Toy for Infants - Old-Style Handheld Bell, Wave Shaker, and Sand Hammer for Newborns Aged 0-1 Year; Suitable for Boys and Girls
$6.90
Low-Temperature Plasma Oil Fume Purifier Electrostatic Ion Module Equipment Rubber Plastic Smoke Treatment Device
$1,600.00
Chunfei Grocery Store - Yun'an GR02 Gravel Bike, Thru-Axle, Disc Brake, Lightweight Touring with Multiple Rack Mounts
$7,977.00
Cashmir Blending Knife Replacement Head Set, Sketch Neony Blending Heads, Sponge Blending Heads, Breathing Cotton for Art Students
$4.34
Natural Amethyst, Rose Quartz, Clear Quartz, and Lemon Quartz Double-Pointed Tumbled Beads for DIY Bracelets, Necklaces, and Earrings
$1.70
![[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)
