Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
Detect Nearby Objects Without Contact
The PIR Micro Motion Detection Sensor AM312 is a proximity presence sensor module with digital output designed for presence sensing, short-range detection, and touchless automation. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Sensing range: 3 meters, ≤100 degree cone angle; Working voltage: DC 2.7-12V; Interface: Digital GPIO.
Why you’ll love it
- Useful spec: <0.1mA
- Sensing range: 3 meters, ≤100 degree cone angle
- Power range: DC 2.7-12V
- Compact size: Approx. 12mm x 25 mm
- Easy wiring: Digital GPIO
- Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| PIR Micro Motion Detection Sensor AM312 | proximity presence sensor module with digital output | Current item |
| Motion PIR Sensor Gravity | proximity presence sensor module with digital output | infrared sensing |
| PIR Motion Sensor Module Digital HC-SR501 | proximity presence sensor module with digital output | digital output |
| PIR Motion Sensor HC SR505 | proximity presence sensor module | digital output, infrared sensing |
What you can build
This sensor is a good fit for touchless dispensers, object counters, door triggers, small robots, and presence alarms.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard and jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include a microcontroller board, jumper wires, and pull-up or pull-down support when needed, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | PIR Micro Motion Detection Sensor AM312 |
|---|---|
| Static power consumption | <0.1mA |
| Sensing range | 3 meters, ≤100 degree cone angle |
| Working voltage | DC 2.7-12V |
| Total size | Approx. 12mm x 25 mm |
| PCB Dimensions | 10mm x 8mm |
| Trigger | can be repeated |
| Delay time | 2 seconds |
| Module Lens | Small lens |
| Interface | Digital GPIO |
Wiring & usage notes
Connect power and ground, then wire the output pin to a digital GPIO input. Check whether the module uses active-high or active-low logic in your code.
What’s in the box
1 × PIR Micro Motion Detection Sensor AM312
Frequently Asked Questions
What does the PIR Micro Motion Detection Sensor AM312 measure?
It is designed to measure nearby objects, remote IR signals, or motion.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this Digital GPIO sensor?
This sensor provides a digital switching-style signal that is easy to read from a GPIO pin.
Does it need calibration?
Yes. Chemical and gas sensors usually need warm-up time, calibration, and periodic checking if you want stable readings.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →