AM312 PIR motion sensor module for automatic human detection. Compact, low power, and easy to integrate into DIY electronics, security devices, and smart lighting systems. The module uses a pyroelectric infrared sensor with onboard digital signal processing for reliable, sensitivity detection in a small package. Key benefits Low power and compact size: operates from DC 2.7 to 12 V with static current draw less than 0.1 mA, making it suitable for battery powered and alwayson applications. PCB measures 10 mm by 8 mm for tight installations. Reliable detection with digital processing: internal digital signal processing reduces false triggers from interference and improves stability in varied environments. Persistent trigger behavior: repeatable trigger mode keeps the output while motion continues inside the sensing zone, then starts the delay from the last detected movement. This prevents flicker and ensures lights or alarms remain active while an occupant is present. sensitivity and wide compatibility: detects human motion using a small fresnel lens and pyroelectric element, compatible with microcontrollers, relay drivers, lighting controllers, alarm modules, and other control circuits. Technical specifications Model: AM312 Operating voltage: DC 2.7 to 12 V Static power consumption: less than 0.1 mA Delay time: 2 seconds Block time: 2 seconds Trigger mode: repeatable trigger Sensing range: up to 100 degree cone angle, detection distance 3 to 5 meters depending on lens Operating temperature: minus 20 to plus 60 C PCB dimensions: 10 mm x 8 mm Lens type: small fresnel lens Package included: MODULE Practical use scenarios Smart lighting: trigger hallway, closet, or cabinet lights to turn on when someone enters and remain on while motion continues, then turn off after the delay time. Security and alarm systems: detect human movement to trigger cameras, sirens, or notification circuits in small access points and entryways. DIY electronics and robotics: integrate as a lowpower presence sensor for hobby projects, automatic doors, interactive exhibits, and motionactivated gadgets. Why choose this module The AM312 module combines low power consumption, compact dimensions, and digital signal processing to deliver dependable motion detection in constrained spaces. Its repeatable trigger mode and simple voltage range make it easy to add human presence sensing to a wide range of projects without complex configuration.