Subj : Re: Homebrew pi400 To : The Natural Philosopher From : Daniel Date : Sun Dec 15 2024 21:11:45 The Natural Philosopher writes: > 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 I've heard rumor of it but is this confirmed? --- SoupGate-Win32 v1.05 * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3) .