Anyone on here played with Rodin coils?  Just learning about the concept, thinking about trying it and looking for applications...

The Bovine Scatology is strong here.

I'm guessing that you have either made and tested a rodin coil and decided that there's no difference from any other electromagnet..

OR

You googled rodin coil and saw the weird rabbit hole that the rodin coil is involved with.

I have seen three different designs claiming to be rodin coils.  Each of them has different magnetic fields, with different shapes and strengths.  I thought I might try building one and playing with the magnetic field, just for fun.  I bought an arduino board and a bunch of hall effect sensors.  I wanted to make a project to learn programming and physics with my kids.  Thought maybe I could use a rodin coil as the primary or secondary of a tesla coil, or maybe as the toroid?  Maybe there is another application that rodin coils would work, such as speaker magnets or generator coils...

Just get a iron ring and wrap some wire around it.

A straight piece of iron would likely be more interesting sine it has two ends available.

And no I had heard of them long ago.

There have been many claims over the years about electromagnets.