Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio products, ...

Your smoke detector’s beeping is supposed to protect you, not confuse you. Yet there are moments when a chirping alarm is a warning that the device itself is no longer trustworthy, even if it still ...

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 ...