How to build your own air quality meter with a Raspberry Pi and CO2 sensor

In winter, it’s important to ventilate living and working spaces regularly. Here’s how to make a homemade measuring station ...

Lockin’s New Smart Locks Never Need Recharging Thanks to Infrared Light

Lockin has announced the Veno Pro Wireless and V7 Max, two new smart locks that the company says will have “zero need to ...
IEEE

A Differential Coupled-Line-Based Active Microwave Sensor System for Retrieving Real Permittivity of Binary Aqueous Solution

Abstract: An active microwave sensor system, which is based on a differential coupled-line, is proposed. The sensor comprises a differential coupled-line, as well as RF circuits. The coupled-line with ...