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 ...

One of the most important metrics on a Fitbit tracker is the Estimated Oxygen Variation—and now that every tracker is fitted with an SpO2 sensor, everyone can take advantage. Blood oxygen may be used ...

July 1, 2026 • A major heat wave is affecting much of the eastern half of the United States this week, bringing dangerous conditions to multiple World Cup matches. June 28, 2026 • Dangerous heat is ...