Comment by atoav

Yes. And thus using a circuit that has the complexity of a circuit one would put onto a circuit board would be a good demonstration. E.g. showcasing vias and other circuit board technologies.

Understandably the first step is to start simple, but that is the essence of my criticism: Too many of these projects become viral hits that stop making any progress after the first symbolic success. Cynics would say these projects all too often stop exactly at the point where the actual challenges start.

And as someone who cares about the environment, I am not sure how I feel about a hundred symbolic projects that go nowhere. Are the substrates of PCBs really the problem? What if people have to throw entire devices with mud PCBs into the bin after a year because the mud PCB couldn't handle the vibration and humidity? Is that environmentally sound?

I'd love to someone really explore alternative PCB materials. But that means living in reality and compsring the whole lifecycle of the result to existing technologies. A automotive tire made of mud is also environmentally sound. It is just that it falls apart after half a block.