AM312 Mini PIR Motion Sensor Module – Low Power Human Detector
₹90.86 incl. GST (₹77.00 + GST)
AM312 Mini PIR Motion Sensor Module
Product Description
The AM312 Mini PIR Motion Sensor Module is a compact and low-power motion detection sensor designed to detect human movement using infrared radiation. Its small size, low power consumption, and digital output make it suitable for security systems, automation, wearable devices, toys, smart lighting, and battery-powered projects.
Compared with larger PIR modules such as the HC-SR501, the AM312 provides a compact fixed-parameter design without external sensitivity or delay adjustment controls. It is designed for simple plug-and-play motion detection.
Digital Motion Detection
The AM312 detects changes in infrared radiation caused by moving bodies within its sensing area. When motion is detected, the module produces a digital HIGH output, allowing a microcontroller to easily identify movement.
Its digital processing provides reliable motion detection and helps reduce unwanted triggers caused by electromagnetic interference.
Ultra-Low Power Operation
The module operates from a wide 2.7V–12V DC supply range and has a static power consumption of less than 0.1mA. This makes it suitable for battery-powered devices where low energy consumption is important.
Fixed Repeatable Trigger
The AM312 uses a repeatable trigger mode with a fixed delay of approximately 2 seconds. No manual adjustment is required, making the module simple to integrate into compact electronic projects.
Key Features
- Miniature PIR motion sensor
- Detects human movement through infrared radiation
- Ultra-low power consumption below 0.1mA
- Wide 2.7V–12V operating voltage
- Digital HIGH/LOW output
- Sensing range up to 3 meters
- Approximately 100° sensing angle
- Fixed 2-second delay
- Repeatable trigger mode
- Compact design
- Suitable for Arduino, ESP32, and Raspberry Pi projects
- No external sensitivity adjustment required
Technical Specifications
| Feature | Specification |
|---|---|
| Model | AM312 Mini PIR |
| Operating Voltage | DC 2.7V – 12V |
| Static Power | <0.1mA |
| Sensing Range | ≤3 Meters |
| Sensing Angle | ≤100° Cone Angle |
| Delay Time | 2 Seconds (Fixed) |
| Blocking Time | 2 Seconds |
| Trigger Mode | Repeatable Trigger |
| Output Type | Digital HIGH/LOW |
| Dimensions | Approx. 10mm × 8mm Sensor Head |
Working Principle
The AM312 uses a PIR (Passive Infrared) sensing element to detect changes in infrared radiation within its field of view. When a person or other warm moving object passes through the sensing area, the change in infrared energy is detected by the sensor.
The module processes the detected signal and provides a digital output to the connected controller. This allows the sensor to trigger lights, alarms, motors, notifications, or other electronic functions.
Output Interface
The sensor provides a simple digital motion-detection signal.
- HIGH: Motion detected
- LOW: No motion detected
This digital output can be connected to a compatible GPIO input on Arduino, ESP32, Raspberry Pi, or other suitable controllers.
Typical Application Scenarios
Security Systems
Suitable for motion-triggered alarms, compact security devices, and camera systems.
Smart Lighting
Can be used in closet lights, stair lights, corridor lighting, and other automatic lighting systems.
Wearable Devices
Its compact size and low power consumption make it suitable for wearable electronics and body-induction applications.
Toys
Can be integrated into toys to activate lights, sounds, or other effects when movement is detected.
Automation
Useful for battery-powered automation systems that require simple human-motion detection.
Applications
- Motion detection systems
- Security alarms
- Smart lighting
- Automatic closet lights
- Stair lighting
- Wearable electronics
- Smart toys
- Car security systems
- Compact camera systems
- Battery-powered devices
- Arduino projects
- ESP32 projects
- Raspberry Pi projects
- DIY automation
- IoT projects
Package Includes
- 1 × AM312 Mini PIR Motion Sensor Detector Module
Product Disclaimer
Product information provided on our website may not be entirely accurate as specifications can vary between manufacturers, suppliers, and production batches. Please verify the actual product specifications before using the module in critical applications.
Product images are for illustrative purposes only and may differ from the actual product in colour, component placement, dimensions, or other visual details.
This sensor is intended for general motion detection and should not be considered a standalone safety or security system for critical applications.
Important Note
Fixed Parameters
Unlike the HC-SR501, the AM312 does not include adjustable sensitivity or delay potentiometers. Its sensing parameters are fixed for simple and compact operation.
Power Supply
The module supports 2.7V–12V DC. Always ensure that the supplied voltage remains within the specified operating range.
Motion Detection
The sensor detects changes in infrared radiation caused by movement within its sensing field. Sensor performance can be affected by installation position, environmental conditions, and the movement of objects within the detection area.
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Frequently Asked Questions
1. What is the AM312 PIR Sensor?
The AM312 is a compact passive infrared motion sensor designed to detect movement of people and other warm objects.
2. What is the operating voltage?
The specified operating voltage is 2.7V–12V DC.
3. How far can the AM312 detect motion?
The specified sensing range is up to approximately 3 meters.
4. What is the sensing angle?
The sensor has a sensing angle of approximately 100°.
5. What output does the AM312 provide?
It provides a digital HIGH/LOW output. The output becomes HIGH when motion is detected.
6. Can I use the AM312 with Arduino?
Yes. The digital output can be connected to a suitable Arduino digital input.
7. Can I use it with ESP32?
Yes. It can be connected to an ESP32 GPIO, provided the output voltage is appropriate for the selected GPIO.
8. How much power does it consume?
The specified static power consumption is less than 0.1mA.
9. Does the AM312 have adjustable sensitivity?
No. Unlike the HC-SR501, the AM312 uses fixed sensing parameters and does not have an external sensitivity adjustment.
10. Does it have an adjustable delay?
No. The delay is fixed at approximately 2 seconds.
11. What is the trigger mode?
The module uses a repeatable trigger mode, allowing the output to remain active during continued motion detection.
12. Is the AM312 suitable for battery-powered projects?
Yes. Its very low power consumption makes it suitable for battery-powered and portable applications.
13. Can it be used for automatic lights?
Yes. It can be used to trigger closet lights, stair lights, corridor lights, and other motion-activated lighting systems.
14. What is included in the package?
The package includes 1 × AM312 Mini PIR Motion Sensor Detector Module.Only logged in customers who have purchased this product may leave a review.
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