It might help to take a look at Arista/Metamako 10G L1 switches for some inspiration. These are 48x ports and use the FPGA for specific network applications (including switching). You might be able to find some of the older models on the cheap on eBay.
I’ve opened up a few and the board itself seems fairly simplistic. I do recall a giant copper heatsink though.
The board-level architecture is going to be super simple as big FPGA designs go:
* XCKU5P in the middle
* 12x GTYs routed to 4x Samtec ARF6 connector for the line cards
* 2x GTYs routed to 2x SFP28 uplinks
* RGMII to back panel management PHY
* Parallel SRAM bus to STM32H735 management processor
* A bunch of Murata MYMGK modules for power conversion off the 12V rail
* STM32L431 in QFN48 or more likely BGA100 depending on IO requirements as a PMIC and to manage reset sequencing etc
This will be fully FPGA based, no separate switch ASIC, and I want to do all of the hardware design. I'm not sure there is much I can learn from somebody else's FPGA switch design at the board level - it's basically just going to be a bunch of transceivers hooked up to SFPs and some power distribution. All the magic happens inside the FPGA.
It would be kind of funny if we build a space probe with an LLM and shoot it out into space. Many years later intelligent life from far away discovers it and it somehow leads to our demise do to badly hallucinated answers.
If you look up your address here it will give you the cost breakdown. (https://sunroof.withgoogle.com/) I just checked my house again and it’s $30K for 10kW, but there is a $10K tax credit, so the subsidy is a 1/3 of the cost.
> Most immutable distros (this included) are developed with the idea that you'd run local commands on the machine, and update a single OS image in place. That gets pretty unwieldy to manage across a fleet of devices.
This is how it always has been on enterprise network devices like switches, routers, etc. It’s pretty trivial to automate updates.
A while back I stumbled on a way to crash my company’s Jira server simply by sending an email to it containing an emoji. Makes me wonder if that could have been abused by malicious parties if they knew the email address we used to forward new support issues to Jira.
As an aside, if you are purchasing an older home make sure you pay for a sewer line inspection. I had no idea this was a thing until a few years later when I had to replace mine and it cost ~$25,000.
I also have an older home and we had to repair our sewer line. It was clay pipe which had broken in a few spots and had major root intrusion. Thankfully there's some newer technology that makes it significantly cheaper in the right circumstances -- instead of digging up your street connection and laying in new pipe they can blow an epoxy-soaked liner into your existing pipe, then run a curing light through it. It ended up being less than 40% of the cost of replacement and works just as well.
We had ours done when we moved in a couple years ago and it was a cool snakey camera thing; they only got us out to the service line; past that would have been a lot more elaborate. Also: that video feed? Pretty gross.
As an aside: I think a lot of people here would be surprised at the amount of technology (and surveillance) that goes into setting speed limits and placing stop signs in residential areas.
A lot of people might also be surprised how frequently traffic engineers will OK unnecessary and less safe four way stops in order to get the annoying citizen pestering them to just leave them alone.
The neighborhood that I have to drive through to get from where I live to where I work hates that their precious little neighborhood is used as a commuter route by a lot of people, so they stuck stop signs EVERY. SINGLE. BLOCK.
I make sure to come to a complete fucking stop at every one of those signs. Partially because I hate the feeling of rolling through stop signs, but partially out of spite lol.
how far is that sewer line run, 6 miles? they usually just bore it out and put a PVC sleeve inside. This is done with the cast iron sewer lines, because if they're not properly taken care of, they will rust into nothing and then you just have a suggestion of a hole through the dirt to the sewer line.
my lines are 4" PVC, if we somehow clog those, someone call me an ambulance.
The old shitty clay lines are what you find in most rentals in SoCal. Then one day none of your toilets flushes and the landlord says you flush too many wipes down the toilet. You argue and they make you pay for a plumber who's like "yea they all do that DONT USE WIPES!!!!!One!!!" And then finally after getting to know every other plumber in town, one offers to run a camera for free and shows you that the main line is fucking falling apart and that's why it keeps plugging up.
TBH sewer main inspections should be required any time someone wants to rent a house out.
I’ve opened up a few and the board itself seems fairly simplistic. I do recall a giant copper heatsink though.
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