Suppose you traveled back in time—say 40,000 years into the past—and then you got stuck. What would you do? How would you rebuild all the stuff that you like? That's the premise of the book How to ...

Kelvin Doe’s neighborhood in Sierra Leone has power lines, but they seldom deliver electricity. So, the 16-year-old whiz kid built his own battery out of acid, soda, and metal parts scavenged from ...

A recent Radio World ebook discussed trends in transmitters and best practices when shopping for one. Mike Cooney is executive vice president of engineering and chief technology officer of Beasley ...