@f4grx@chaos.social
@f4grx@chaos.social avatar

f4grx

@f4grx@chaos.social

Joined Apr 16, 2022

#nobot #noarchive #nobridge #nothreads #nometa

#Curiosity, #science, #technology, #hack, #8bits, #retrocomputing, #diy, also #environment, #humanrights #humor %utf8

General allergy to machine learning tools, blockch*ins, bullshit and pseudoscience in general
(┛ಠ_ಠ)┛彡┻━┻

Posts deleted after 1 year, nothing of that much value is kept here.

This profile is from a federated server and may be incomplete. Browse more on the original instance.

azonenberg, to random
@azonenberg@ioc.exchange avatar

New toy! Busy being a dad for a bit but will set it up after she goes to bed.

Closeup of the Stanford Reaearch Systems stamp on the top of the box

f4grx,
@f4grx@chaos.social avatar

@azonenberg no it has all orbit data after 30sec with a good antenna. You can tell because it is tracking many sats.

Instead it's in survey-in, it gets an accurate fix by averaging all sat positions for a long time, so it can assume a static receiver and compute an increased accuracy time-only solution. It will monitor the orbits for many hours. Dont move the antenna!

f4grx, to random
@f4grx@chaos.social avatar

Nothing is NOT wild at #cern :

this paper about the kicker magnets (that inject and extract the beams) is a very interesting read: https://cds.cern.ch/record/1334789/files/arXiv:1103.1583.pdf

Paper is engineering oriented, not theoretical, so it's very understandable.

Have a look at the voltage/current/timing requirements for these magnets.

f4grx,
@f4grx@chaos.social avatar

Of course the superconducting dipoles are cool.

But these ones are impedance controlled, powered by pulse forming networks, have a current ramp of 13000A per MICROsecond, are considered slow if they reach full current in a microsecond.

Absolute technoporn.

f4grx, (edited )
@f4grx@chaos.social avatar

@gsuberland I think we dont really realize how fast a nanosecond is (I know I dont), so this conversion does not make justice to the insane amount that is 13 mega fucking ampere per millisecond, or 13kA/us.

Same for 13 giga ampere per second. It's almost impossible to grasp, we have no comparison point for giga-amperes.

Most intense lightning strikes were clocked at 10kA and last a few tens of microseconds, so hmm, almost comparably insane. Because thats per bunch.

f4grx,
@f4grx@chaos.social avatar

@gsuberland how much current do you push in the gate to achieve these switching times? IIUC, the gate capacitance is the critical parameter in mosfets.

f4grx, to random
@f4grx@chaos.social avatar

Hey that's a cool video about
https://www.youtube.com/watch?v=-lHXZk5M6cI

deirdresm, to ADHD
@deirdresm@hachyderm.io avatar

Bullet point 1 is the funniest thing I’ve ever read about #ADHD. Also true.

f4grx,
@f4grx@chaos.social avatar

@deirdresm then by that definition alone I'm definitely very very deep in the adhd rabbit hole.

f4grx,
@f4grx@chaos.social avatar

@deirdresm tf

(they dont like my vpn (its ok from desktop))

root42, to amiga
@root42@chaos.social avatar

Oh, and what would the Amiga be without this chip? The mighty Motorola 68000. A massive DIP64 package. None of that puny 8086 crap that Intel made! With a little bit of squinting you could even think that it‘s a 32 bit processor. Of course nowadays Motorola lives a life rather in the limelight, under the name of Freescale.
What are your feelings towards the venerable 68k?

f4grx,
@f4grx@chaos.social avatar

@root42 best cpu evar. Taught me assembly on my ti92+.

tubetime, to random
@tubetime@mastodon.social avatar

help i'm stuck in a 7-segment decoder factory

f4grx,
@f4grx@chaos.social avatar

@tubetime telephony stuff? Edit: no, does not really match ss5.

Decoding artifacts due to the internal gates?

f4grx, to random
@f4grx@chaos.social avatar

Hate this but I have to know a minimum, curiosity is itching and I want to know the low level gore of how this shit works.

f4grx,
@f4grx@chaos.social avatar

from the intro of their reference book:

"Rust has a new language release every six weeks."

holy shit. NEVER tell me this is stable.

f4grx,
@f4grx@chaos.social avatar

@mokona stable does not mean "without bugs" :)

It means "not being a moving target" :)

gsuberland, to random
@gsuberland@chaos.social avatar

ran into a bunch of issues compiling grub2 on MinGW, so here's an infodump:

Unsupported TCHAR size - just typedef TCHAR as char, and SIZEOF_TCHAR as 1.

next, error: conflicting types for ‘grub_util_file_sync’; have ‘void(FILE *)’

for some reason it's declared void in grub-core/osdep/windows/hostdisk.c so change it to:

int
grub_util_file_sync (FILE *f)
{
if (fflush (f) != 0)
return -1;
if (!allow_fd_syncs)
return 0;
return fsync (fileno (f));
}

f4grx,
@f4grx@chaos.social avatar

@gsuberland did you write this? I would read it, to learn about how to boot a x86. Never did that.

North, to random
@North@chaos.social avatar

Today, I'm going to get my neglected greenhouse ready for the season

f4grx,
@f4grx@chaos.social avatar

@North thats a pretty place! I can imagine it full of beautiful plants!

f4grx, to LEGO
@f4grx@chaos.social avatar

People are crazy. 1600 euros for a minifig. Quoi le fuck.

bortzmeyer, to ipv6 French
@bortzmeyer@mastodon.gougere.fr avatar

Vous vous en fichez mais je découvre qu'il y a un résolveur public en Inde (apparemment géré par le registre du .in) et il a une bonne adresse (et elle répond aux ICMP echo).

Comme quoi les adresses IPv6 ne sont pas forcément plus longues et plus dures à mémoriser que les adresses IPv4.

https://framagit.org/-/snippets/7253

f4grx,
@f4grx@chaos.social avatar

@bortzmeyer @ploum même le 9.9.9.10 ?

gsuberland, to random
@gsuberland@chaos.social avatar

am I the only one completely uninvested in raspberry pi stuff? there always seems to be some fervour about their newest unobtainium SBC doodad and I never quite understand the use-case for the price.

f4grx,
@f4grx@chaos.social avatar

@gsuberland it's not that interesting. It would be cool as a server but the disk performance is abysmally bad, model after model. A two player minetest world using the sqlite backend does not run smooth when the world is on a usb key.

The last model has pcie but not easily available m2 or other mounting board so... Meh.

dansup, to random
@dansup@mastodon.social avatar

deleted_by_author

    •
    f4grx,
    @f4grx@chaos.social avatar

    @thisismissem @dansup This would come with an extreme social cost. The fediverse is not just about money.

    rysiek, (edited ) to DuckDuckGo
    @rysiek@mstdn.social avatar

    FuckFuckNo. 🤦‍♀️

    I just want a search engine that works. I have zero need for a godawful "AI" hallucinating mansplainer in my results. Just… no.

    Time to move off of DDG. What else is out there?

    Edit: yes, it seems to be for real:
    https://www.reddit.com/r/duckduckgo/comments/1adxgy4/give_duckduckgo_ai_chat_a_spin/

    #DuckDuckGo #AI

    f4grx,
    @f4grx@chaos.social avatar

    @matt @MarkAssPandi @rysiek @katzenberger happy to use startpage and see it at this place in the list. I dont see ads with ublock.

    Natouille, to random French
    @Natouille@mastodon.tetaneutral.net avatar

    Les agences immo qui te répondent pas alors que tu veux visiter un truc. Changez de métiers les gars !!

    f4grx,
    @f4grx@chaos.social avatar

    @Natouille y'a deja 347 visites sur les 3 prochains jours, de toute facon.

    f4grx, to random
    @f4grx@chaos.social avatar

    I had forgotten how good Stefan Gotteswinter was at . I'm reviewing many of his videos again and it's so educative I'm going to rewatch a lot!

    North, to random
    @North@chaos.social avatar

    Just found out that my dad is having a stroke... on April Fool's day, which is a bad time to do that... not that there's a good time to do that.

    I can't go to the hospital, it's too far away from my house... I'm letting my brother take my car.

    I don't know what to do right now.

    f4grx,
    @f4grx@chaos.social avatar

    @North i'm a bit late, but I'll still send best wishes and moral support.

    AkaSci, (edited ) to random
    @AkaSci@fosstodon.org avatar

    The venerable Voyager 1 spacecraft is experiencing another glitch. Instead of sending science and engg. data, it is sending a 0101 bit pattern.

    The problem has been narrowed down to the flight data system (FDS), which is not communicating properly with the telecom unit (TMU). A reboot did not help.

    Stay tuned as NASA engrs work out a fix for this 1970's era computer, which has performed magnificently during its long 46-year journey to the planets and to outer space.
    https://blogs.nasa.gov/sunspot/
    1/n

    f4grx,
    @f4grx@chaos.social avatar

    @AkaSci i guess it will require a full reprogramming to avoid allocating memory in the faulty chip. Do they still have the ability to assemble code for the FDS?

    f4grx,
    @f4grx@chaos.social avatar

    @AkaSci it depends if they have the assembly listing to regenerate the software load or if they need to do binary patching!

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