Electric motors are easy to make; remember those experiments with wire-wrapped nails? But what’s easy to make is often hard to engineer, and making a motor that’s small, light, and powerful can be ...

High frequency Helmholtz coils are often used to generate uniform but time varying high frequency magnetic fields for a number of applications such as magnetic field susceptibility, calibration, and ...

Mr. Bugeja said that he wanted to create an ultra-compact drone, and started developing the ultra-small motor as a result. However, Mr. Bugeja eventually says that he noticed that "there is a limit to ...