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 ...
IEEE

Terahertz Refractive Index Sensor Based on Tunable Graphene Metamaterial Absorber

Abstract: A terahertz refractive index sensor constructed with graphene metamaterial absorber has been proposed. The sensor features a patterned graphene structure, consisting of an independent ...
IEEE

Fiber Bragg Grating Refractive Index Sensors with a Circular Refractive Index Modulation Region via Femtosecond Laser Phase Mask and Fiber Rotation

Abstract: This study presents a novel fiber Bragg grating (FBG) refractive index (RI) sensor featuring a circular refractive index modulation (RIM) region, fabricated by integrating femtosecond laser ...
CNX Software

HealthyPi 6 – A portable Wi-Fi 6 biosignal acquisition device with ECG, PPG, respiration, and temperature sensors (Crowdfunding)

Designed by ProtoCentral Electronics in India, the HealthyPi 6 is an open-source, portable, research-grade biosignal acquisition device designed for academic research, education, and prototyping. It ...
Wareable

The Pebble Index 01 is a $75 smart ring without a battery or sensors

Pebble has officially entered the smart ring arena—yet, in true Pebble fashion, the company is completely ignoring the rules set by the likes of Oura, Samsung, and Ultrahuman. The Pebble Index 01 is a ...