If you’ve ever wanted to pump sound to all the rooms of your house, you might use any one of a number of commercial solutions. Or, you could go the more DIY route and whip up something like ...

If you have two headphones, speakers, earbuds, or any other Bluetooth hardware, you can now use both simultaneously on a Copilot+ PC.

Before a spectrometer can do any useful work, it needs to be calibrated to identify wavelengths correctly. This is usually done by detecting several characteristic peaks or dips in a well-known ...