Learn how to make a simple lemon battery and use it as an emergency phone charger in this hands-on science experiment. Watch step-by-step as we cut lemons, prepare copper and aluminum electrodes, and ...

Discover how to create a simple electric motor using everyday materials in this step-by-step tutorial. Learn how to build a homemade DC motor by winding copper wire into coils, constructing a custom ...

The creative new approach could lead to more energy-efficient machine-learning hardware. On a table in his lab at the University of Pennsylvania, physicist Sam Dillavou has connected an array of ...

It may sound odd, but a home-brewed marker generator can be useful in many situations. Let us see how to make one with a simple circuit. To understand exactly what a marker generator (often with a ...

With so much analog-circuit design being done by automated tools and circuit-performance analysis done with tools such as Spice, it may seem anachronistic to actually go through a basic circuit in ...