HomeKit Weekly: Aqara Presence Multi-Sensor FP300 brings Thread and motion automations to your smart home

The Aqara FP300 is a battery-powered presence sensor with Thread and mmWave radar, giving HomeKit precise motion and ...
IEEE

Power Testing of Preinsertion Resistors: Limitations and Solution

Abstract: Preinsertion resistors (PIR) are used in combination with circuit breakers to absorb switching transients and come into effect during the “closing” operation of the breaker. It is mainly ...
Investopedia

How to Use a Tree Diagram for Probability and Decision-Making

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
Live Science

Snakes' mind-bending 'heat vision' inspires scientists to build a 4K imaging system that could one day fit into your smartphone

The human eye can only detect wavelengths in the visible light range, but a new imaging system will let us "see" infrared ...
IEEE

Detecting Direction of Movement Using Pyroelectric Infrared Sensors

Abstract: Pyroelectric infrared (PIR) sensors are widely used as a simple but powerful people presence triggers, e.g., automatic lighting systems. In particular, by alternating the effective ...