AM312 Mini PIR Motion Sensor Module

AM312 Mini PIR Motion Sensor Module

The HW-740 PIR Motion Sensor Module is a compact passive infrared sensor based on the AM312 chipset, designed for reliable motion detection in low-power applications. It supports a wide operating voltage range (2.7VDC – 12VDC) and draws under 0.1 mA in standby, making it ideal for battery-powered and IoT devices. Its small PCB footprint (approximately 12mm × 25mm) and integrated digital signal processing simplify integration in space-constrained projects.

Features

• Detects motion via passive infrared (PIR) technology up to 5 meters.
• Consumes less than 0.1 mA in standby mode, suitable for low-power designs.
• Fixed output delay time of about 2 seconds upon detection.
• Operates across a wide voltage range from 2.7VDC to 12VDC.
• Provides a repeatable trigger mode: output remains high if continuous motion is detected.
• Compact PCB size (≈ 12 mm × 25 mm) with a small lens (≈ 5 mm diameter).
• Built-in digital signal processing and noise immunity for reliable performance.

Specifications

Applications

• Automatic lighting and smart home automation systems.
• Security and surveillance motion detection.
• Battery-powered IoT devices (e.g., ESP8266, ESP32 projects).
• Energy-saving sensors in portable electronics.

Package Contents

• 1x AM312 PIR Motion Sensor Module.

Documents

• AM312 Sensor Datasheet
• AM312 Sensor Manual
• PIR Sensors Arduino Library
• Example ESP32 Project