The ‘Circuit Graver’ by [Zach Fredin] is an unconventional PCB milling machine, utilizing many ... PCBs is quite a good solution for the rapid prototyping of electronics.
An RTX 4090 Ti prototype has been reportedly discovered in a computer junk bin. The card sports a PCB mounted parallel to the motherboard and display connectors mounted on a separate daughterboard.
But this phenomenon isn’t isolated, and all sorts of one-off prototyping ... of the same PCB onto a larger panel to simplify the fixturing process when moving the design from machine to machine ...