Yes, [Carl] decided to build a tiny robotic rover out of a foldable PCB. This choice was made as ... of a 3D chassis without the need for bulky connectors joining several boards together.

The entire switch fits on a tiny 45 mm x 45 mm PCB. To this end, it eschews the common RJ45 connector, which is bulkier than necessary. Instead, thin Molex PicoBlade connectors are used for the ...