Learn how to make a simple hand-cranked power generator from scratch using basic materials like DC motors, a wooden base, an ...

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 ...

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 ...

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 ...