PIR & Motion Sensor
PIR & Motion Sensor
Introduction Almost all PIR sensors use a dual-element design. This is not arbitrary – it’s essential for the sensor’s function. This article explains why two elements are better than one. The Problem with Single-Element Sensors A single pyroelectric element responds…
Project Overview This project creates a wireless motion notification system that uses ESP-NOW protocol to send alerts between ESP32 boards without requiring a Wi-Fi network. It is perfect for monitoring remote locations like workshops, sheds, or entry gates where Wi-Fi…
Project Overview This project creates a touchless automatic trash can lid that opens when you wave your hand or approach with trash. A PIR sensor detects motion, and a servo motor lifts the lid. After a few seconds, the lid…
Project Overview This project creates an energy-saving HVAC control system that automatically adjusts temperature settings based on room occupancy. When a room is occupied, the system maintains normal temperature; when the room is empty for a set period, it enters…
Project Overview This project converts a standard sink faucet into a touchless automatic faucet. When you place your hands under the faucet, a PIR sensor detects motion and opens a solenoid valve, allowing water to flow. When you remove your…
Project Overview This project creates a smart baby monitor that detects when your baby wakes up and sends an alert to your phone. Unlike traditional audio or video monitors, this system uses a PIR sensor to detect movement in the…
Project Overview This project creates a hands-free garage door opener that detects when your car approaches and automatically opens the door. Using a PIR sensor mounted near the driveway, the system detects your vehicle’s heat signature and triggers a relay…
Introduction Smart mirrors and interactive displays are becoming common in homes, hotels, and retail spaces. PIR sensors provide an elegant way to activate these displays only when someone is present, saving energy and preserving the mirror effect when not in…
Introduction Smart lighting systems combine PIR occupancy sensing with daylight harvesting to maximize energy savings. This article explains the integration and best practices. What is Daylight Harvesting? Daylight harvesting automatically dims or turns off electric lights when sufficient natural light…
Introduction Retailers need accurate data on customer traffic to optimize staffing, store layout, and marketing effectiveness. PIR sensors provide a low-cost, privacy-preserving solution for customer counting and traffic analysis. Applications in Retail Entry/Exit Counting Count customers entering and leaving the…