PIR & Motion Sensor
PIR & Motion Sensor
Introduction While a single PIR sensor can detect motion, multiple sensors in an array can count people, determine direction, and even track movement. This guide covers array configurations and signal processing techniques. Why Use Arrays? People counting: Determine number of…
Introduction Choosing the right PIR motion sensor for your smart home can be overwhelming. This guide walks you through key considerations to find the perfect sensor for your specific needs. What to Look For 1. Smart Platform Compatibility Amazon Alexa:…
Introduction Pet owners face a common dilemma: how to keep security systems armed without triggering false alarms from cats and dogs. Pet-immune PIR sensors use specialized lenses and signal processing to ignore animals while still detecting humans. This guide covers…
Introduction While many PIR applications work with default settings, precision applications require systematic calibration. This guide covers calibration procedures for optimal performance. Why Calibrate? Compensate for sensor-to-sensor variation Adapt to specific installation environment Optimize detection vs. false alarm trade-off Meet…
Introduction Commercial building automation is a major driver of PIR sensor demand, with new energy codes in the EU (EPBD), California (Title 24), and Japan mandating occupancy-based lighting and HVAC control. This guide covers the key considerations for selecting PIR…
Introduction PIR sensors and modules offer different output interfaces. Choosing the right one and interfacing correctly is essential for reliable operation. Output Interface Types Push-Pull Digital Output Output is actively driven HIGH to VCC and LOW to GND. Can source…
Introduction With the US Hot Cars Act requiring child presence detection in all new passenger vehicles by the 2028 model year, automotive-grade PIR sensors are becoming a critical component. This guide covers the key specifications and options for selecting PIR…
Introduction PIR sensors are designed to detect human body radiation, which peaks around 9.7 μm. To achieve this selectively, they incorporate optical filters that transmit only the 8-14 μm band while blocking other wavelengths. Why Spectral Filtering Matters Without filtering,…
Introduction Arduino projects often use PIR sensors for motion detection, but with dozens of modules available, choosing the right one can be confusing. This guide covers the most popular PIR sensor modules for Arduino, their characteristics, and when to use…
Introduction Noise is the enemy of reliable PIR detection. This guide identifies noise sources and provides practical mitigation strategies. Types of Noise in PIR Systems 1. Thermal Noise (Johnson-Nyquist) Fundamental noise from thermal agitation of charge carriers. Present in all…