Additive nanomanufacturing applies 3D printing at the nanoscale, enabling precise fabrication for electronics, energy, ...

Photoplethysmography (PPG) is an optical sensing technique that measures blood volume changes and underpins devices ranging from hospital-grade pulse oximeters to consumer wearables that track heart ...

It’s a quiet revolution happening under the hood—and it has nothing to do with horsepower. As vehicles inch closer toward full autonomy, the real race is not about speed but about perception. How ...

Here’s a fun build from [RootSaid] that is suitable for people just getting started with microcontrollers and robotics — an Arduino-controlled two-wheeled robot. The video assumes you already have one ...

Looking for a reliable home weather station that fits your needs? We tested a range of weather stations to see how well they ...

In a year when most meteorologists were watching signs of drought — especially across the western half of the country — the middle of the U.S. has been inundated with moisture. It’s not just been hot, ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. Air quality infamously drops as the days grow cold and we ...

I'm a Fitness & Nutrition writer for CNET who enjoys reviewing the latest fitness gadgets, testing out activewear and sneakers, as well as debunking wellness/fitness myths. In my free time I enjoy ...

Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...