Optical rotary encoders are the most widely used way to transform mechanical rotary motion into electrical signals. There are three basic configurations for optical encoders: incremental, absolute, ...

A rugged, self-contained, resolver-based encoder, the Shaft-Tracker from Computer Conversions Corp. can replace less reliable optical shaft encoders. The device provides both incremental and true ...

Knobs are ubiquitous in technology user interfaces, but touchscreens are increasingly replacing them for interface controls. The latest project from [upir] combines a rotating knob with a touchscreen ...

Optical techniques are methods that use light to probe or control matter. One prominent example is optical spectroscopy, which includes such methods as pump–probe spectroscopy, Raman spectroscopy and ...

We’ve rounded up the best MagSafe, Qi2, Qi2.2 25W, and MagSafe-compatible magnetic chargers, from the plain pad to multi-functional stands (up to six devices charged), and even the most colorful—from ...

I've been a contributing editor for PCMag since 2011. Before that, I was PCMag's lead audio analyst from 2006 to 2011. Even though I'm a freelancer now, PCMag has been my home for well over a decade, ...

Active noise cancellation is an increasingly common feature of wire-free earphones. If you want to block out the world around you, check out the best noise-cancelling wireless earbuds we've tested.

H2O Wireless is a nationwide wireless company that offers coverage through GSM Networks. The company offers a variety of individual and multiline plans, as well as prepaid and pay-as-you-go solutions.

Jeff Carlson writes about mobile technology for CNET. He is also the author of dozens of how-to books covering a wide spectrum ranging from Apple devices and cameras to photo editing software and ...

Jeff Carlson writes about mobile technology for CNET. He is also the author of dozens of how-to books covering a wide spectrum ranging from Apple devices and cameras to photo editing software and ...

RAMageddon has come for computers. The price of memory chips, hard drives, and solid state storage has skyrocketed. That’s ...