If you’ve got an old black and white TV, it’s probably not useful for much. There are precious few analog broadcasters left ...

Discover how to make a DIY hand-powered mobile phone charger using simple materials such as two small DC motors and a piece ...

Explore how to build a DIY electric motor using simple, readily available materials in this detailed tutorial. Watch ...

Abstract: The face, a crucial bodily feature, communicates a lot of information. Facial expressions, such as blinking and yawning more often than usual, differ from those in normal conditions when a ...