Subj : Re: Homebrew pi400 To : Daniel From : The Natural Philosopher Date : Sat Dec 14 2024 13:56:15 On 13/12/2024 23:55, Daniel wrote: > Theo writes: > >> Theo wrote: >>> The Natural Philosopher wrote: >>>> On 11/12/2024 16:46, Daniel wrote: >>>>> Andy Burns writes: >>>>> >>>>>> Daniel wrote: >>>>>> >>>>>>> Jeff did a teardown on his second channel and soldered a m.2 socket >>>>>>> hoping it was properly designed. He found the power lines weren't traced >>>>>>> in so no power. >>>>>> >>>>>> There were some nearby component missing too, maybe the Rev1 board has >>>>>> bugs, and they need a Rev2 (or whatever) but his soldering job looked >>>>>> relatively clumsy (bridged pins etc). >>>>> >>>>> Yeah, it was pretty bad, at least he was honest about it. >>>>> >>>>> I am sure things were missing to keep the circuitry disabled and I'm no >>>>> engineer. >>>> >>>> Why would you put support chips on if you were not going to install an >>>> M.2 socket anyway? >>>> >>>> I think he called it right in that this is a bare bones model, and more >>>> upmarket versions will emerge in due course. >>> >>> Looking at: >>> https://www.jeffgeerling.com/sites/default/files/images/pi-500-m2-socket-install.jpg >>> https://www.jeffgeerling.com/sites/default/files/images/pi-500-pcb-bottom.jpeg >>> >>> I think there's a MOSFET and some decoupling capacitors missing (to the left >>> of the middle larger hole), so the power isn't connected. There may be a >>> pair of missing capacitors in series with the PCIe lane, but I can't >>> immediately see the footprints for those. >> >> Ah, I see them now. To the right of the spot on the silver chip are four >> tiny spots for passives, oriented at compass bearing 135 degrees. I can't >> tell from the photo or video whether they're populated or not, but those >> will be the series capacitors. >> >> Theo > > I'm going to wait for someone to hack a working solution then copy > it. Wait for the Pi 501...with it all one the board already -- Canada is all right really, though not for the whole weekend. "Saki" --- SoupGate-Win32 v1.05 * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3) .