This probe design is little more than a 3D printed case, an old power supply toroid, and a conventional alligator clamp to make the business end. The sensor uses a ferrite core and a hall effect ...

Anyone who has ever wound a toroidal coil by hand can tell you that ... number of windings and their spread on the form. lacking a ferrite core for testing, [Sandeep] used a plywood ring as ...

They provide attenuation of selected frequency bands. The physical shape of ferrite beads is similar to a toroidal inductor, but the beads have a greater length to diameter ratio and usually a greater ...