Learn how microphones and amplifiers work together to convert sound to electrical signals for clear audio output.

It will also operate small transistor radios, and Elgin researchers believe that it will eventually be used in hearing aids. When worn in close contact with the human body, the battery must be ...

Sony launched the world's first non-projection, fully transistorized television, the TV8-301, in May 1960, about six years ...

At its core, the diamond battery thrives on decay — specifically, the decay of the carbon-14 isotope. Carbon-14 is best known ...

[2000MAH POWER BANK WILL KEEP DEVICES POWERED] FosPower's emergency radio incorporates a 2000mAh power bank capable of providing emergency power to any small tablet or phone. [3 POWER SOURCES ...

SIMPLE, EASY-TO-USE FM/AM RADIO WITH HIGH QUALITY SOUND: Portable handheld radio with digital tuner has a simple, easy-to-use interface, with antennas that pick up both AM and FM signals EASY-TO ...

In his new book, Source Code, Gates recalls a unique childhood that led him to build a technology empire. We talk BASIC, old ...

Here in the future, though, there are many more satellites in orbit and a few are specifically meant for ham radio operators. And, like the ’50s, it doesn’t take too much specialized equipment ...

Spotted in the latest Windows 11 preview build, Microsoft is adding an option to show your PCs battery percentage next to the battery icon in the System Tray on the Taskbar. Pretty much all ...

For the time being, I'll continue to store my go-to transistor radio, the Sony ICF-P26, within my personal emergency kit.

The HDR-18 even has a record output if you want to record content or incorporate the radio into your current hi-fi system. The HDR-18 is not battery-powered, but it comes with a standard 12-volt ...