After my DIY article “Build Your Own Headphone Amp” in the May 25 issue, the good folks at Radio World asked me to share the process by which I make printed circuit boards. There are usually two ...

According to the most recent data from the World Bank, 15 percent of the world’s population—approximately 1.1 billion people—lacked access to electricity in 2014. In 1994, approximately 27 percent of ...

I want to build a cheap chick brooder to keep some baby chicks at a constant temperature (95F first week, drop by 5 degrees each week until week 6 when they are released)<BR><BR>The "standard" way is ...

A team of researchers from the University of Arkansas has successfully developed a circuit that can capture the thermal motion of graphene and convert it into an electrical current. The physicists say ...