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 ...
MarketWatch

E-Mini S&P 500 Future Continuous Contract

2-Year U.S. Treasury Note Continuous Contract $104.387 0.016 0.01% 5-Year U.S. Treasury Note Continuous Contract $109.281 0.039 0.04% 10-Year U.S. Treasury Note Continuous Contract $112.391 0.063 0.06 ...
Nature

Optical sensors articles from across Nature Portfolio

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 ...
Los Angeles Times

Mini Crossword

Challenge yourself every day with a free mini version of the classic crossword puzzle. Can you solve The Mini in minutes — or seconds? Play a new puzzle every day or browse the archive. Jump in to ...