Instead of using an air coil to generate heat in the cookware, this one uses an iron core instead. The project’s creator [mircemk] built an air core induction stove in the past, and this new one ...

His starting point was a design using a hand-wound air-core coil, a germanium diode for a detector, and a variable capacitor that was probably scrapped from an old radio. The coil had three ...

Researchers unveil a cutting-edge air-core fiber optic gyroscope with unprecedented thermal stability and precision, marking ...