Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | AM312 |
| Detection Type | Passive Infrared (PIR) |
| Operating Voltage | 3.3V - 5V DC |
| Detection Distance | Up to 7 meters |
| Detection Angle | 100 degrees cone |
| Output Signal | High level (3.3V) / Low level (0V) |
| Board Dimensions | 23mm x 14mm x 10mm |
| Delay Time | Adjustable via potentiometer |
| Application | Motion detection, automatic lighting, security systems |
| Package Includes | 1x AM312 Sensor Module |
Anonymous
Mar 31, 2026
Rating: 4/5
Good value, compact size
Very compact and easy to integrate into tight spaces. It took a moment to calibrate the delay time correctly, but once set, it triggers reliably. Great price point for hobbyists.
Anonymous
Mar 30, 2026
Rating: 5/5
Perfect for Arduino projects
This little sensor works flawlessly with my Arduino Uno. The detection range is impressive for such a small size, and the sensitivity adjustment pot makes it very versatile. Highly recommended for DIY automation.
Anonymous
Mar 27, 2026
Rating: 5/5
Best mini PIR sensor
Compared to the larger HC-SR501, this AM312 is much easier to hide in custom enclosures. Sensitivity is excellent, picking up movement consistently from about 5 meters away in my tests.
Anonymous
Mar 21, 2026
Rating: 5/5
Reliable motion detection
I used three of these to create a hallway lighting system. They have been running for months without false triggers. The low power consumption is a huge plus for battery-operated setups.
Anonymous
Mar 17, 2026
Rating: 5/5
Easy to use for beginners
As someone new to electronics, I found this module very forgiving. The pinout is clearly marked, and plenty of tutorials exist online. It instantly lit up my LED when I walked by.
Anonymous
Mar 09, 2026
Rating: 4/5
Solid performance
Does exactly what it says on the tin. The detection angle is wide enough for doorways. Only minor issue is that the pins are a bit short for some breadboards, but easily solved with jumper wires.
Q: What is the maximum current output of the signal pin?
A: The output pin provides a logic high signal (approx. 3.3V) but is not designed to drive high-current loads directly. You should use it to trigger a transistor, relay, or microcontroller input.
Q: How long does the output stay high after motion stops?
A: The duration is adjustable via the 'T' potentiometer on the rear of the board. It can typically be set anywhere from a few seconds to several minutes depending on your rotation.
Q: Can this sensor detect motion through glass or plastic?
A: Yes, infrared radiation can pass through materials like thin plastic and certain types of glass, though thick or treated glass may reduce sensitivity. For best results, ensure the lens has a clear line of sight.
Q: Is there a way to adjust the sensitivity?
A: Yes, there is a small potentiometer on the back of the board labeled 'S'. Turning it clockwise increases sensitivity, while counter-clockwise decreases it.
Q: Does this work with Raspberry Pi GPIO pins?
A: Absolutely. Since the module operates at 3.3V to 5V, it is fully compatible with Raspberry Pi GPIO pins. Just connect VCC to 5V or 3.3V, GND to GND, and OUT to a GPIO input pin.
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
Wen Zhengming Small Regular Script Calligraphy Cards: Li Sao Jing, Thousand Character Classic, Qin Fu, Cao Tang Shi Zhi, Qing Jing Jing, Record of the Drunken Pavilion, Red Cliff Ode
$59.00
Zhizhi Manshu Zhao Mengfu Small Regular Script Collection of Ancient Classics (Vol. 1) - Calligraphy Copybook, Brush Writing Cards, Foldable Practice Cards
$49.00
Language of Drums Motion Path Set - Essential Creativity and Rhythm Teaching Material for Drum Kits and Jazz Drums
$59.14
onlycook Sink Drain Basket, Faucet-Mounted Food Residue Separator and Washing Strainer - 1 Pack
$14.10
Heavy-Duty Wiper Arms and Blades for Trucks and Agricultural Vehicles - Universal Replacement Wiper Rubber Strips
$5.50
![[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)
