3D printed holder mounted to bike wheel ... of [Antonio]’s earlier work in making a DIY rotary encoder out of a ring of magnetic spheres. He found that such a ring in front of two Hall effect ...
It involves a bit of behind-the-scenes action in the form of a battery holder that you palm, but the end effect is quite cool. Essentially, this is a 3D printed ring with SMD LEDs painstakingly ...