[Nick] is working on a prototype of a coffee table sand plotter that draws patterns in sand a lot like a zen rock garden. [Nick]’s zen rock garden uses a magnet to draw a ball bearing across ...

It's built using an existing table that's been fitting with a Raspberry Pi, a motor, a magnet, and housing for the sand so that a metal ball can be moved about the bottom to draw the images.

It means the glass doesn't touch the surface of the table. There are four different types of glasses available to buy, as well as a wired or wireless metallic base sold separately. Produced by ...

It's built using an existing table that's been fitting with a Raspberry Pi, a motor, a magnet, and housing for the sand so that a metal ball can be moved about the bottom to draw the images.