The following content is brought to you by Mashable partners. If you buy a product featured here, we may earn an affiliate commission or other compensation. Experts lead 19 hands-on classes. Credit: ...

Discover how to build a simple wireless power transfer system at home using readily available components like enameled copper wire, an LED, a 2N2222A transistor, and a 9V battery. This step-by-step ...

Another lifetime ago, and as a young engineer, I had to design a power conversion system. The input power came as raw electrical energy from a jet engine during flight. The output power was input to ...