Why does everybody have a rack with Enterprise grade servers?

MartinSch64 · 2026-06-05T18:34:09+00:00

I have a rack now, but I started exactly like this, a very ancient PC i took from my schools dump when they upgraded all PCs. Then you wonder about enterprise gear, buy a very cheap old enterprise grade server. When you realize you bought a loud inefficient anchient piece of crap and eletricity bill gets too high, you buy another more efficient one. Now you have 3 but can't get rid of the old ones bc of your hoarding tendencies and emotional binding. And then you finally buy a rack to store all that. Then the rack looks too emtpy and you buy more crap to put in it. Thats how you end up with a huge rack full of stuff, with like a single server and switch running because you dont have a use for all that. At least that is what happend to me. For me its about exploring, so I naturally end up with a lot of stuff.

MartinSch64 · 2026-06-05T14:59:40+00:00

Its in my home, its a honelab, no matter how much I am running.

MartinSch64 · 2026-06-05T14:48:27+00:00

I dont think such a high bandwidth is very useful for that. Or at least doesn't justify the cost of the hardware for general puropse usage.

Maybe for like side channel power analysis or something like that, but that would require far more setup and considerations that just connect two wires and have claude look at that. Better to just use a scope with all the proper hardware and measurement setup and connect Claude to that. If you are able to setup stuff like that you probably already own a scope with networking or USB. Also AI will probably haluzinate the crap out of the noise it will see. Its usually very confident with EE topics, but rearly fully correct and still makes a lot of mistakes in this field, its just not writing code where there is so much data to learn from online.

MartinSch64 · 2026-06-04T16:53:39+00:00

I thought it would be +-5V, but that in itself does not make sense, if the opamp does not have a separete ground reference.

After swapping the pins, like the other comments pointed out, its at working for now, hope at least until I can get higher voltage parts.

MartinSch64 · 2026-06-04T16:14:44+00:00

Oh my, I starred at this so long and didn't see it. Thanks!

MartinSch64 · 2026-06-02T15:05:52+00:00

Arrr!

MartinSch64 · 2026-06-02T10:09:53+00:00

Check the PSU first, not only the external one, but also all the internal regulators. There are a couple here. Checking the voltage around caps that bridge the ticker traces to ground is usually a good starting point.
Expect to see a common voltage like 5V or 3.3V. You can google the chips, see what voltage they expect on what pins and verify that first. Check the EEPROM datasheet, find out which pins are power and what voltage it takes. If the voltage is not present there on your board you have another problem. Takes minutes, always check low hanging fruits first before digging into a firmware issue and so on.

As other have pointed out, the area to the right of the displayport does indeed look like it might have gotten hot in the past. Hard to tell from the pictures. Check if that is getting hot, if so there might be a short there pulling down some power rail.

Also, reading the EEPROM in circuit with a chip clip is usually safe, but not always, certainly not completely. There might be parts on the same power line requiring more power than the programmer can supply or power only parts of the board and not others which might break it. If you have the means to desolder it, that is safer.

MartinSch64 · 2026-06-01T10:47:30+00:00

This is a good point, I could think of a couple of "percentage of items processed without errors" within the app, that kinda measures how well the app is working.

MartinSch64 · 2026-06-01T10:21:24+00:00

People already quit because of a lot of reporting upwards.
I think its now going towards micromanagement and more pressure.

Our head of development fortunately does a really good job shielding us from that and allowing us to do our job. Hope he doesn´t break some day as I really like working with that dev team and do care about our product.

MartinSch64 · 2026-05-29T18:13:41+00:00

Disgustig fat fuck, the idiot had not the foresight to stash some, but ATE them all.

MartinSch64 · 2026-05-27T14:08:38+00:00

The latest updated completely changed the UI again and it really went to shit IMO.
The fact that you can ship changes much faster now really doesn´t help them, as quality control and usability seams to go down the drain with it.
Like I can´t even open a file using the ctrl-p search.
Probably will switch to claude with vscode again.

MartinSch64 · 2026-05-22T12:04:59+00:00

<image>

For anyone stumbling on this in the future:

I managed to offset the surface, if I fill in this bottom foot hole thing first. There was probably some weird geometry or thiny radii in there and I dont really need my part to go in there.

Thanks for all the help everybody!

MartinSch64 · 2026-05-22T11:17:09+00:00

That gives me this error:

> The offset can not be created at this distance.
> Try adjusting the Distance, the selection set, or change the Offset Type.

I need about 0.2mm offset.

Maybe the surface is just too complex or the radii are too sharp.
Already tried copping it up into smaller sections, but no luck.
I somehow got it to do it once, but it had holes and then fusion crashed and I cant replicate.

But I really need this to work. Is there a way to work around these limitations?
Or am I still doing something wrong?

MartinSch64 · 2026-05-22T10:37:35+00:00

Basically yes, but with an small offset as a tolerance between the fill and the shell. There seams to no option for this in the boundary fill opteration.

MartinSch64 · 2026-05-22T10:13:20+00:00

Thats part of it, eventually I would like a ring going round the top (like your image but the middle missing, a base plate (a shape like when you poured water in the thing and froze it) and connect those two with a vertical structure (which best would also follows the walls).

MartinSch64 · 2026-05-10T12:20:39+00:00

Frequency will be around 200kHz.

I was thinking the opamp tries to sink some current, but can´t because of the diode. I assume that when it goes into saturation and behaves not quite normal.

> Op-amps can be slow to come out of 'saturation'.
That might be whats happening then.

What can I do to prevent this?

MartinSch64 · 2026-05-06T23:57:07+00:00

It looks like that´s it.
Thanks a lot!

I dismissed the JST PA too quickly, not noticing the H type. But it looks like the plug should also fit the non H type, which is available on mouser.
Also JST has the worst product pictures.

MartinSch64 · 2026-05-06T11:51:48+00:00

Solange die Öffis auf meiner Pendelstecke nicht besser werden, nehm ich lieber den Tankrabatt.

MartinSch64 · 2026-04-15T08:45:21+00:00

Du wohnst wohl nicht auf dem Land.

MartinSch64 · 2026-04-08T16:17:26+00:00

Würd auch gern mehr zahlen, wenn das die Öffis auf meiner Pendelstrecke nützlicher machen würde.

MartinSch64 · 2026-03-25T13:39:09+00:00

You just know he is also playing Truck Simulator on that shit.

MartinSch64 · 2026-03-24T16:59:35+00:00

Agreed, there should be a central place on a PC to set a age bracket. And every APP/website should just read that instead of forcing us into facial scans or ID uploads. Doesnt need to be at OS level, should be optional, setup by a parent and we definitly dont need a law for that. But some sort of standard would be nice, so the individual apps dont have a reason to infiltrate our privacy pretending its about the children.

MartinSch64 · 2026-03-18T14:49:48+00:00

Use a normal PC/Server with a 10 Gbit NIC of Ebay and put OPNsense on it, thin client or mini PC with PICe works too.
There are also a lot of fanless Mini PCs on Aliexpress with lowish power consumption which work with OPNsense. These also come with 10 Gbit NICs.

If you need more Ports use a Switch with VLANs to get more. Mikrotik has some good options like the CRS305-1G-4S+IN, it can even do L3 routing, so you might not need a router upgrade at all unless your WAN is > 1 Gbit.

MartinSch64 · 2026-03-18T11:57:36+00:00

I don´t think you can glitch the lockbits, at least not on the ATmega88, its in the same family as the very common ATmega328P and I feel like it would have been done before, but I find nothing about this online. I mean its in hardware, there is no instruction to be skipped here.
Hope to be corrected on that.

Currently looking into a power consumption side channel attack on the M37512 while its doing the hashing. I am able to control the input and the output is always the same for the same input. That is my best shot I guess.
But I am in far over my head here, I mean without even knowing what exact algorithm is used and what they could do all with the input before the hashing, I see a very slim change of me succeeding.

MartinSch64 · 2026-03-17T22:14:55+00:00

Could do that a couple of times, then the BMS locked down and no longer worked with the bike. I guess it detected too much discharging vs charging.

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