ao2.it
Antonio Ospite, theorist attacks

When I built the low-cost and precise rotary encoder with magnetic spheres I used 21 spheres because they fitted nicely in the other parts of the build I had around.

However, if an arbitrary number of spheres is to be used then an appropriate holder must be built.

You know what they say that constraints drive creativity, I think this post is just another little example of that.

Usually I do not put time constraints to my hobby projects, but I make sure to have some other kind of constraints, like keeping the cost low and trying to reuse stuff that I already have.

In this case I needed a way to measure the angle and speed of a rotating object for some of my projects, and I wanted a rotary encoder that was inexpensive, but precise enough to work at very low speeds.

If you don't know Vihart and her "Hexaflexagon series", go check it out:

Most of the information I have come across about migrating from Drupal 6 to Drupal 8 is about migrating content, however before tackling this problem another one must be solved, maybe it is obvious and hence understated, so let's spell it out loud: preserving the site functionality.