Introduction Smart parking systems need to detect whether a parking space is occupied. While inductive loop detectors and ultrasonic sensors are common, PIR sensors offer a low-cost alternative for detecting vehicles. How PIR Detects Vehicles Vehicles, especially after being driven,…

Introduction Museums and galleries have unique security requirements: protecting valuable exhibits while allowing visitors to view them. PIR sensors offer a discreet, reliable solution. Applications in Museums Exhibit Protection PIR sensors placed near valuable exhibits detect anyone approaching too closely…

Introduction Smart bathrooms use sensors to automate lighting, ventilation, and even hygiene features. PIR sensors play a key role in detecting occupancy and triggering these functions. Applications in Bathrooms Occupancy Detection Detect when someone enters the bathroom. Used for: Turning…

Introduction Automatic doors rely on sensors to detect approaching people and trigger the door mechanism. PIR sensors are a popular choice due to their low cost, reliability, and ability to detect warm bodies. Types of Automatic Door Sensors PIR sensors:…

Introduction Vending machines are becoming smarter. PIR sensors play a key role in detecting approaching customers, waking up the machine, and powering down when no one is around. Applications in Vending Customer Detection When a person approaches, the machine can:…

Introduction Smart lighting systems combine PIR occupancy sensing with daylight harvesting (adjusting light levels based on available sunlight) to maximize energy savings. This article explains the integration. What is Daylight Harvesting? Daylight harvesting automatically dims or turns off electric lights…

Introduction Energy harvesting – powering devices from ambient energy (light, vibration, heat) – is becoming practical. Ultra-low power PIR sensors are key enablers for maintenance-free wireless motion sensors. The Power Challenge A typical wireless sensor must operate for years on…

Introduction Robots often need to detect people for safety, interaction, or following. PIR sensors provide a low-cost, low-power solution for human detection in robotics applications. Applications in Robotics Human Detection for Safety When a robot detects a person nearby, it…

Introduction Traditional PIR sensors output an analog voltage or a simple digital pulse. Newer digital PIR sensors integrate amplification, ADC, and digital logic, offering I2C interface for configuration and readout. Advantages of Digital PIR Sensors Programmable parameters: Sensitivity, threshold, timing…

Introduction Curtain lenses, also known as long-range or corridor lenses, are specialized Fresnel lenses that create a narrow, elongated detection pattern. They are essential for applications requiring long-distance detection. How Curtain Lenses Work Unlike wide-angle lenses that spread zones across…