@jaseg@chaos.social
@jaseg@chaos.social avatar

jaseg

@jaseg@chaos.social

I am doing #electronics, #embedded programming, #python scripting, hardware security and recently some sewing. Pronouns: er/they

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gsuberland, to random
@gsuberland@chaos.social avatar

no idea if it's actually causitive, but interestingly the grid frequency graphs for the UK last night show large measurement error bars around the times of the x-ray flux peaks measured by GOES.

jaseg,
@jaseg@chaos.social avatar

@gsuberland My guess is that the grid's wires picked up a bunch of noise, which threw off whatever made those frequency graphs. If those graphs come from a normal phasor measurement unit, those devices are very sensitive and do a lot of math to extract precise, low-latency synchrophasor estimates. I can totally see how noise on the input could throw that off.

arturo182, to random
@arturo182@mastodon.social avatar

I've never been much into robotics but seeing this makes me want to build an open-source version of the Amazon Astro 😁

https://www.youtube.com/watch?v=g4z4i_XAV5w

jaseg,
@jaseg@chaos.social avatar

@arturo182 Modulo the amazon wants to watch you in your sleep issue this thing is awesome both in its hardware, and in the UX possibilities it brings.

jaseg,
@jaseg@chaos.social avatar

@arturo182 I imagine I could program it to read my Todos through CalDav, and physically follow me around the flat with any that are more than a month overdue.

mntmn, to random
@mntmn@mastodon.social avatar

did you ever encounter some RP2040 GPIOs just not... working? i.e. you tell it to output a logic high level, but the actual pin is close to GND? we have some pocket keyboards that are like that. there is no short on the board. so i'm wondering how this can happen. damage during soldering, handling?

jaseg,
@jaseg@chaos.social avatar

@mntmn @timonsku @Laberpferd If it's a blown ESD diode, the chip's current consumption should also be significantly higher. You might even see a difference when looking with a thermal camera.

jaseg,
@jaseg@chaos.social avatar

@mntmn @funkylab @Laberpferd @timonsku I have damaged MOSFETs before with a poorly grounded soldering iron which had ~90V to earth at several hundred microamps right on its tip.

sad_electronics, to Electronics
@sad_electronics@fosstodon.org avatar

Asking the bubble. For your maker needs, what is your experience with M.2 cards without chamfered edge?

jaseg,
@jaseg@chaos.social avatar

@sad_electronics I've used a bunch of non-chamfered boards for edge connectors, and I think it's fine for a few insertions. The specs on these connectors are often rather loose anyway. I've once managed to stuff a 1.2mm PCB into a nominally 1.0mm SFP+ socket.

k, to random
@k@layer8.space avatar

a person yesterday asked me, as i put my coffee on top of my (lid closed) laptop "are you not afraid that it'll break?".

sure, i do value my stuff and hope that my stuff lasts for long - but at the same time my stuff = a tool for me. if this laptop (Lenovo "ThinkPad" x240) couldn't last my use (throwing into a laptop without padding, being hurdled around, you know - setting coffees on top of it) - i don't think i'd still have it.

and the same goes for my phone, it too, has to last.

opinions?

jaseg,
@jaseg@chaos.social avatar

@k also an x240 will just, objectively, not break from a cup of coffee.

jaseg,
@jaseg@chaos.social avatar

@k I feel like this about my stuff too. That's why I have a cheap phone with a thick plastic bumper case and a glass screen protector, that thing goes flying at least once a day.

I find that repairing stuff also makes it less scary to break. The first time I broke a phone display I was really upset about it, but now, after repairing phones ~10 times, it's way less scary to drop one.

bleeptrack, to random
@bleeptrack@vis.social avatar

Hey barkeepers, liebe Tresenwesen!
Is there a good method to cool down liquids without diluting them too much? Thinking of: tea as a base for iced tea drinks. I usually shake them through ice.
I guess preferred would be cold brew but I currently don't have space for a big jug in the fridge :/

jaseg,
@jaseg@chaos.social avatar

@bleeptrack You can put it in a (heat resistant) plastic bag, then hold that under running water. Alternatively, put a heavy glass or mug into the freezer and cool it down with that. There's also "ice cubes" made from stainless steel that you put into the freezer, then dump in the drink.

codingcatgirl, to random German
@codingcatgirl@chaos.social avatar

ICE1010 so:

  • ICE Sprinter (Mannheim - Köln Messe/Deutz)
  • ICE Sprinter (Köln Messe/Deutz - Essen)

... hält in:
Mannheim, Frankfurt, Siegburg/Bonn (???), Köln Messe/Deutz, Düsseldorf, Duisburg, Essen

um... das widerspricht jetzt meinen naiven Verständnis, was ich dachte was ein ICE Sprinter ist und tut?

jaseg,
@jaseg@chaos.social avatar

@codingcatgirl Ich bin auf der Strecke München-Berlin ein paarmal mit einem Sprinter gefahren, der hatte ganz viele Halte am einen Ende der Strecke, und ist dann ohne Zwischenhalt bis zur Endstation durchgefahren. Fährt der vielleicht noch weiter?

jaseg, to linux
@jaseg@chaos.social avatar

So my just catastrophically self-destructed. I was using arch with the yubikey full-disk encryption package, when the machine hung and crashed during a system update. The machine crashed exactly after the old initramfs files were cleaned up, and before the new ones were written to disk. Since the yubkikey fde thing stores the seed ("challenge") for the luks key in the initramfs, all copies of the seed are gone now, and the data on that disk is unrecoverable.

jaseg,
@jaseg@chaos.social avatar

Quite the failure mode if you ask me. I guess I will be scraping that yubikey fde thing from all of my machines now, and go back to plain passphrases. Deleting the old seed files before the new ones have been written and flushed to disk is a pretty bad design error.

jaseg,
@jaseg@chaos.social avatar

@wonka I'm not sure, but I suspect whatever wrote the new files didn't make sure they were flushed to disk before deleting the old files.

jaseg,
@jaseg@chaos.social avatar

@waldi it uses the yubikey in challenge-response mode instead of plain password mode so you can't read the luks passphrase out of the yubikey without the computer.

jaseg,
@jaseg@chaos.social avatar

@jannem I mean I have been running arch for about ten years now and this is the first time I have had an issue like this.

jaseg,
@jaseg@chaos.social avatar

@psotle @viq I have a backup for cases like physical damage or loss to the hardware key. That I have to resort to that backup because of an avoidable snafu like this is lame.

jaseg,
@jaseg@chaos.social avatar

Update: The backup has worked and I have restored the system to working order with minimal data loss.

jaseg,
@jaseg@chaos.social avatar

Update to the update: The creators of the yubikey full disk encryption thing have responded to my bug report with what is essentially a shrug emoji and the line "I hope you had [a backup]".

I don't think that's an appropriate reponse from the maintainers of a critical piece of software like this. I think if you choose to release software like this, you have a responsibility to either make it good or to at the very least warn users that it's bad.

jaseg,
@jaseg@chaos.social avatar

Here's the github link. Please don't brigade the thread.

https://github.com/agherzan/yubikey-full-disk-encryption/issues/106

jaseg,
@jaseg@chaos.social avatar

@EA8DHY If they can't figure out the path automatically, just prompt the user.
With the mkinitcpio thing, I don't have the time to take on that fight. For me it doesn't matter if it's their tool or their upstream, the end result is the same: Their tool can't be used safely.

I believe they have the best intentions, but unfortunately the result sucks despite those good intentions.

emszabo, to random
@emszabo@mastodon.world avatar

Note to those who work at their home office like me:

Once in a while alk away from the tek for a few days. Carpal tunnel suuuuucks. Definitely don't do what I did this week and try to push through it.

Also anyone know good cheapish ergo mice? I'm eyeing logitech because habit, but the one I want is like $60 referb/$100 new

jaseg,
@jaseg@chaos.social avatar

@emszabo I'm using a logitech MX vertical, and it's awesome. I went through four(!) cheap ergo mice before getting this logitech one, and they all broke. Only this one has held up, now for 5 years or so so far. IMHO well worth the money.

crmsnbleyd, to random
@crmsnbleyd@emacs.ch avatar

https://mander.xyz/post/12646384 with alt text

jaseg,
@jaseg@chaos.social avatar

@crmsnbleyd Easy! Just don't download them and instead leave them to rot as open browser tabs

timonsku, to random
@timonsku@mastodon.social avatar

Why I don't like bars and clubs yet lol
At yesterdays after party

jaseg,
@jaseg@chaos.social avatar

@timonsku S
Damn, that ppm value is not that far off from a percentage

naka, to random

today is a no headphones, just enjoy the S-Bahn ride kind of day

jaseg,
@jaseg@chaos.social avatar

@naka I know this pain. On weekends when I do groceries, easily half of the time I find myself in this big grocery store in town badly annoyed at ads blaring at me from the store's PA system, when I notice that I left my headphones at home.

jaseg,
@jaseg@chaos.social avatar

@naka I should probably hide several packs of those high-quality moldex earplugs in all of my pockets so that I have a backup 😅

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