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I have used fable to aid me with PCB design. It is pretty good. But it can also sometimes make very human mistakes. It mixed up RX and TX on a uart line. If you don't catch stuff like that and get assembled boards this can obviously be pretty annoying. On the other hand I have also mixed up RX and TX before, lol.

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I feel like just leaving PCB routing and schematics for it is just waste of tokens.

Once you have initial design (what chips to use, what each of them needs in terms of other components etc.) the schematic/PCB isn't the hard part but it is the hard part for the AI.

It's great at stuff that humans take a lot of time like say "get me buck converters in that range of voltage in power, and put price of chip and supporting components in the table", and at least in not heavily analog designs, finding chips that fit the purpose, are available and in price range is good part of the work

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