Why would one choose to work with a bare computer board atop a layer of tinfoil like this? https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjc1rzfjnK

Why would one choose to work with a bare computer board atop a layer of tinfoil like this? https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjc1rzfjnK1u35tQpdkuGgBetluIW83iM43HYLbd8hjk7EJLiliyAK03QLu1njtt5gK5buwGQ2tnEkIlvLdALK5qWnTWzmO9rFMQrqQJUR7GFNuyQo1kKT2FC99_UxsVWEQG826KGZ9IQVP_QC_LoqBsxSPdcdeOwZn-2ybybBZl-MCSlmJpqk3s6q__W8/s4080/PXL_20230702_225911600.jpg https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj... Perhaps the tinfoil was clipped to a ground? Would it then be protected from static shocks and other invisible (to the naked eye) damage? Historically I've used flattened cardboard outside on top of a brick patio, and ensured I touch a grounded circuit before e.g. replacing capacitors. No e-deaths due to static yet, though my equipment is nearly all from ~circa 1999 or newer, and I believe newer equipment typically incorporates some static protections into designs. TFA's PCB layout connections are so flowy and beautiful, they remind me of a past HN submission about rounded PCB circuit wiring: "Melting KiCad" https://mitxela.com/projects/melting_kicad https://mitxela.com/projects/melting_kicad / https://news.ycombinator.com/item?id=31108652 https://news.ycombinator.com/item?id=31108652 p.s. this is an amazing writeup, thank you to the OP for submitting and to the author for taking the time and care. Really, really cool. This reminds me a bit of a Ken Sherriff analysis https://righto.com https://righto.com (!) <3