u/Fencepost

So I'm unaware of the job title "product engineer"....maybe you should identify a job posting first?

Dated how so? Sure it predates 40gbps links being commonplace but there's not a word of the text I don't believe still applies

This comment sums up so much of my frustration with C

No. Nobody worth their salt uses auto-routers on any /real/ board. It's impossible to get an autorouter to understand the nuance of a mixed signal design or even with a pure digital design.

Just ask vendors for the numbers - it's always characterized by the actual substrate vendors. The Er is gonna be very close to the prepreg, likely close enough that z dimension tolerances will be more impactful.

Are you high?

Did you control the dc bias conditions for your measurements?

I've personally worked on a lot of these devices, the answer is: it's harddddd. If your boss thinks one or two embedded engineers is going to pull this off.... they're smoking something good. You're never going to achieve it with off the shelf chip antennas, you need to design the product itself to be the antenna (precisely controlled housing slots etc). This is only accomplished with lots and lots of simulation and experience. Remember: when apple or any other manufacturer builds something like this, they have antenna design teams of many many many PHDs with multiple generations of the product to have iterated and understood how small changes matter. The general public has no appreciation for /how/ hard this actually is

I mean, it's way more expensive to replace a scope in the future than to buy it once. The eBay store is a great pointer, I've gotten my personal scope there. I believe you can actually buy the 4000x series and software unlock one bandwidth higher in the future (so buy 500MHz and upgrade to 1.5). I also think there's a lot to be said for making sure you have enough bandwidth to do your measurements. I've definitely seen times in the past where issues are masked by newbies thinking that they have enough bandwidth but they're missing glitches and non-monotonic edges. People dramatically underestimate the required bandwidth because they think in terms of data rate not rise time - things as simple as I2C at 400KHz can need as much as 300 or 500MHz to properly measure

I would just caution that you shouldn't go nuts here. It sounds like you're not sure what everything is used for which would indicate to me you're not ready to use it (or at least you need to learn one piece of equipment at a time). You can quickly turn this into a money hole if you don't know what you're buying and exactly what for. That said, a good oscilloscope would be the number one place to start. A particularly good purchase would be a Keysight MSO4000x series scope. Get yourself 4 channels and digital option along with at /least/ 1.5GHz BW option. It's gonna cost a pretty penny (probably 25-30k?) but if you treat it well it will last a long time and has the capability to do anything you could possibly want outside of multi-gigabit links. If you ever get to that level you generally want to rent anyways.

Don't go after the loan, go after the net wealth. The loan is actually a thing used by a non negligible number of upper middle class people when they need short term cash to cover an expense without ruining their retirement. Take a loan with your retirement account as collatoral to pay for some unexpected expense

Actually I think no sarcasm. If I was a water engineer and my wife got me divining rods I'd probably think that's a fantastic joke and they'd likely get displayed somewhere for a long time

Houses cost property tax on a recurring basis. Yeah you can go for art or whatever, but you also need to liquidate your stocks to do that which is spoiler alert a taxable event

Eliminating the ability to take loans against your portfolio isn't great either. There's a lot of people (admittedly upper middle class) but not even millionaires who need this as a way to get short term cash without tanking their future planning. I feel like the loans against assets thing has been a distraction because no one in power is willing to say the real thing: when you're sitting on more money than you can spend in a lifetime filled with caviar and yachts, you need to pay taxes on that money. Period. I was personally a fan of the 50million dollar limit that was floated a while back but unfortunately too many idiots in this country seem to think that 50million is actually a thing that's within reach

They're just showing you where the topside fillet ends. Not a soldermask feature on your board

This is standard db design with normalization: table of tags, columns would be id, tag (or maybe tag_type, tag_value) with a uniqueness constraint. Then build a join table that's got columns person_id and tag_id. Queries are then easy and optimized

Are you /sure/ this should be json? Sounds like the kind of thing that could be normalized and just a join table. Especially with the desire to search it as you've mentioned, this might be better as a conventional paradigm

Really there's no good reason to use MySQL anymore because of the conflict of interest and past behavior on oracles part. There are better, more performant options (Postgres or if you have existing codebase that isn't vendor neutral, mariadb) on the market that have non of those issues

Sweet Jesus. You need to get yourself access to some SIG docs.

So genuine question, I've got a lot of experience with board level pcie but never proper "slotted" designs (as in its always hard connected). When you bifurcate a link what happens to perst and clkreq? You just wire-or them and all devices share a power state?

This was my absolute favorite five I've ever done. Who did you go with?

I love that a browser infamous for gobbling memory is now experimenting with a library that will make it hold onto all memory it's ever allocated

The PLC interface communicates at that data rate not the i2c

I mean let's be clear: Gavin is in fact an assclown; but he's our assclown and he was voted into position with a real majority process instead of some drunk "majority of the minority" process that goes on in a california recall.

You should go really learn about heat pumps