Compact AM312 AS312 PIR Infrared Sensor Module for embedded motion detection. Small, energy efficient, and designed for reliable automatic induction tasks where low power and easy integration matter. Key benefits Low power consumption: operates on DC 2.7V to 12V with static current <= 20uA, suitable for battery powered and lowpower designs. sensitivity and reliable detection: built around a pyroelectric infrared detector with internal digital signal processing to improve antiinterference performance. Small size and easy embedding: compact module form factor simplifies installation in constrained spaces and embedded systems. Consistent output and simple interface: repeatable trigger behavior with a 3V logic level and low output, ready for direct connection to microcontrollers and control circuits. Predictable timing: fixed 2 second delay and 2 second lockdown time provide a stable, repeatable response without external adjustment. Technical specifications Working voltage: DC 2.7V to 12V Static current: <= 20uA Sensitivity: not adjustable Light control: not adjustable Delay: 2 seconds, non adjustable Lockdown time: non adjustable (2 seconds) Trigger method: repeatable Output: 3V and low level output Sensing range: cone angle <= 100 degrees; distance <= 4 meters Operating temperature: 20 C to +55 C Internal processing: digital signal processing for enhanced antiinterference capability Why this module solves common problems Reduces power drain in alwayson sensing applications, extending battery life and lowering system energy use. Digital signal processing reduces false triggers from electrical noise and environmental interference, improving system reliability. Fixed timing and nonadjustable controls remove the need for calibration in many use cases, simplifying deployment in massproduced or embedded products. Standard 3V logic output makes integration straightforward with a wide range of controllers and logiclevel inputs. Typical applications Automatic lighting and corridor controls: detect human presence to switch lights on for a short, consistent interval. Occupancy detection for switches and smart home devices: integrate into wallmounted or deviceembedded circuits for hands operation. Lowpower alarm and robotics systems: provide reliable motion sensing in batteryoperated sensors, toys, or mobile platforms. This module is suitable for designers and engineers seeking a compact, lowpower PIR sensor with stable, repeatable outputs and robust antiinterference performance for embedded motion detection projects.