Still Andrew (I guess) is a user on You can follow them or interact with them if you have an account anywhere in the fediverse.
Still Andrew (I guess) @ajroach42

@amphetamine right.

The clever bit here is honestly mostly in the decoding side.

I mean, backscatter RF signals are still essentially magic, and designing a system that can generate consistent and measurable information signals out of that is astounding.

Doing it with a consumer grade 3D printer puts it in to nearly unbelievable territory.