dorotaC

Greybeard but revolutionary. 80-char lines are good for museums.

"The least tech-y techie I know." - Doug

My tech writing (hire me): https://dorotac.eu/
Open bike computer: https://jazda.org
dcz on libera.chat

Public Key

npub1dvsuqmzh4jsjerdszplqvxmgcxl8fwuknn7dd76m978uq2ac9t8qk7ttxk

NIP-05 Address

[email protected]

Profile Code

nprofile1qqsxkgwqd3t6egfv3kcpqlsxrd5vr0n5hwtfelxklddjlr7q9wuz4nspz4mhxue69uhhyetvv9ujuerfw36x7tnsw43qz9thwden5te0wfjkccte9ekk7um5wgh8qatztx2p3z

Publishing to

relay.ditto.pub

relay.mostr.pub

Author Public Key

npub1dvsuqmzh4jsjerdszplqvxmgcxl8fwuknn7dd76m978uq2ac9t8qk7ttxk

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Last Notes

2026-11-03 15:40:46 GMT

Do you know of anyone who kept something private because they don't want it to be used to train LLMs?
I'm looking for evidence for a #blog post.
Thanks!
#llm #web #society

2026-11-02 08:40:37 GMT

My #bank: we will never ask your login information over the phone.
Me: calls to unblock my card.
Also my bank: what's your username and password?
Name and shame: comdirect.
https://www.comdirect.de/hilfe-service/notfall.html?CIF_Check=true#:~:text=comdirect%20wird%20Sie%20niemals
Anyone got German bank recommendations? Preferably where I never have to call them. Preferably with a more than 6-digit PIN...
#banking #money #security #password

2026-10-27 11:17:35 GMT

Has anyone tried using #wgpu with dma-buf?
There's an #opengl extension for importing buffers but I don't know anything low-level about wgpu.
#graphics #programming #rust #linux #cameras

2026-10-21 16:10:24 GMT

Straciliśmy Bibliotekę Aleksandryjską.
A teraz Bibliotka Infostradyjska jest przypalana.
Coraz trudniej znaleźć wartościowe informacje w Internecie, nie? Coraz trudniej coś w nim umieścić, co?
I to częściowo wina nasza - uczestników Internetu i twórców platform.
Szczególnie trudno będzie przeżyć społecznościom Wolnego Oprogramowania.
Prezentacja na #jesien2026 dostała ostatnie poprawki. #Kraków, nadchodzę :)
#wolneoprogramowanie

2026-10-21 08:49:23 GMT

What was that #software project that explicitly uses invites for contributors?
I forgot its name and I need to find more details for my #jesien2026 talk.
#opensource #freesoftware #governance

2026-10-21 07:58:21 GMT

Help, my #inkscape is drunk :|
How do I get it undrunk?
#programming #UI #software #freesoftware
https://cdn.fosstodon.org/media_attachments/files/117/477/829/332/768/148/original/9d2dd5d76351e9c7.png

2026-10-20 18:09:46 GMT

@nprofile…fau3 jak mogę podlinkować komuś swoją prezentację bezpośrednio :D?

2026-10-17 17:17:12 GMT

#Linux mystery: pread() returns -EINVAL when used on the MMC block device, but not on a regular file.
I'm trying to reverse-engineer some #microsd questions and this is in the way.

2026-10-15 14:29:48 GMT

If you love a #hardware hacker, make sure they have a signal analyzer. And/or an #oscilloscope.
This message is running on repeat in my head.
#electronics #diy #hacking #tools

2026-10-09 07:19:59 GMT

I love #ipv6 . But some things are unworkable.
Is anyone using an IPv6 #VPN? Could you share the length of the prefix?
I'm considering submitting a patch to #Linux which would allow #ULAs to be routed automatically (set accept_ra_rt_info_max_plen to 64), and I'd like to know good reasons *not* to do that first.
Any #network subsystem maintainers on the fedi?
https://patchwork.ozlabs.org/project/netdev/patch/[email protected]/
#programming #networking

2026-10-06 12:38:56 GMT

Any #food technologists here?
There are preserves in #jars. There are preserves in #cans.
How does the decision to put food in one or the other get made?
I only see the difference in that glass jars are transparent, but do baked #beans really need to be kept in the dark?
#foodtech #askfedi

2026-10-06 07:36:05 GMT

#IPv6 confusion: can a router advertise that there's a #network on the other side? Without handing out any addresses?
I want to join 2 ULAs on 2 separate links: A/64 and B/64. The host routes between links and has A:1/64 and B:1/64.
This host is *not* the default router, so I can't set up the routes there and call it a day.
Is there a way?
#networking #routing #homelab

2026-10-06 05:55:35 GMT

Hello! I decided to start an Architecture Astronauts Anonymous support group.
Here you can share how you DRYed your project to death, how you overgeneralized and how you scope-creeped for sth you didn't even want, and then got distracted.
Weeee understaaaand youuuuu.
Meetings offline to preserve privacy... but also online if you don't care... in a mask? And on Sunday mornings, just night owls... no, make it Sat evenings with regional exceptions...
Um, I'll post an update once I figure out...

2026-10-03 05:42:03 GMT

What storage do you use when designing sensor stations?
#MicroSD cards are cheap, unless you want a datasheet.
Go on Digikey, and you get only super-durable SLC #flash chips for overkill prices.
Where's the middle?

2026-10-03 04:30:27 GMT

#electronics design question.
In 4-layer boards, signals are routed outside, and ground inside.
Why not route signals inside, sandwiched between power planes? Would't solid copper reduce undesired #RF emissions from high speed signals?
#radio #PCB

2026-09-23 11:16:05 GMT

First thermal #camera use: identified a fried chip on an e-book reader. It was visibly fried without the #infrared, but the camera helped to notice.
#electronics #repair #diy

2026-09-20 13:38:56 GMT

#Mastodon, go home, you're drunk.
I got notified of a #notification.
Then I had to accept it in order to see the notification about which I was notified.
Apparently I can't be trusted with unfiltered notifications. I wish Mastodon stopped being so paternalizing and let me have my own say rather than put the mods in a Big Brother position.
And no, that account isn't a spammer or a bot.
https://cdn.fosstodon.org/media_attachments/files/117/303/636/124/866/337/original/3b9a4154aaff867a.png

2026-09-06 15:02:49 GMT

So... what is a "push notification"?
I heard this term in mainstream media, so I'm interested in a non-technical definition.
https://www.ibm.com/think/topics/push-notifications
IBM says that it's a popup from the OS, but it tracks them only to 2008, whereas "Activate your Windows XP" popup existed back in 2002, so IBM's definition contradicts facts.
(IIRC There were already IM messages in popups, "your download completed", etc.)
What does it actually mean? Is it different from "notification" or is it only marketing?

2026-08-28 05:38:51 GMT

Hey #electronics nerds, where do I get a bunch of those ONLY in red and black?
Rainbow is cool but *each* of my breakouts and spiders needs red and black jumper wires, throwing things out of proportion...
#DIY #askfedi
https://cdn.fosstodon.org/media_attachments/files/117/171/519/491/931/236/original/9edec5ec2c54644c.webp

2026-08-24 10:48:33 GMT

#Censorship in #LLM s is achieved by fine-tuning. What are the most current base models available to run locally, without censorship, and without tuning to fit a specific task?
It's kind of hard to figure out from huggingface model sheets.

2026-08-22 11:24:52 GMT

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@nprofile…wu7v How are they a loss of light?

2026-08-22 10:23:59 GMT

How do I modify builtin #Javascript objects?
In #Firefox I can do:
Object.defineProperty(window, 'performance', { value: undefined });
but if I put it in #Greasemonkey it does nothing :(
#coding #programming #web #userscripts #privacy #paranoid

2026-08-22 10:14:09 GMT

#photography question:
Do #macro converters reduce quality a lot?
Vignetting, blurring, chromatic aberration? I'm kinda weak on #optics this advanced.
I wonder if I should buy one. I already have an extension ring but attaching it is a bother.
Are converters sensitive to optics quality? Used cheapo or 3 times the price for the original #Olympus MCON-P01?
Shame that there's no superzoom lens with macro in #MFT :P
#askfedi

2026-08-22 10:13:30 GMT

2026-08-15 16:26:31 GMT

Solder paste on a PCB is like salt on a dish.
It's easy to add, but difficult to eliminate.
#SMD #soldering wisdom №684: not enough solder paste is strictly better than too much.
Unless you like bridges.
#electronics #diy

2026-08-13 15:41:21 GMT

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@nprofile…q3ex That doesn't seem like it. All Fedoras have 3.4.4.

2026-08-13 11:53:33 GMT

I enjoyed #rsync remote file completions for a while, but I upgraded to #Fedora 44 and now it chokes a few directories deep into the path :( I suspect some #bash expert failed on a whitespace inside the directory.
#linux #filesytem

2026-08-13 11:09:31 GMT

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@nprofile…sthj I look, and I see that it depends on the wheel being aligned. And my frame is already bent and wheel misaligned. I guess I have bigger problems than a bent hanger...
And it's built into the frame anyway.

2026-08-13 10:40:06 GMT

3rd attempt at #ESP32 .
Lessons:
- Pay attention to values
- Don't cross wires
- Use flexible cables or you'll tear off pads
- Verify design rules or you'll forget stuff
- Break out #UART even if you think you won't need it (you will)
- #UVTools has #Gerber rendering issues
- Don't cross wires!
- Oscilloscopes are gold
- 120°C solder paste on a hot plate works great
#USB is simple, yet I had to fix 3 mistakes before it worked.
#electronics #kicad #DIY #microcontrollers #octopus
https://cdn.fosstodon.org/media_attachments/files/117/087/753/225/864/786/original/541ed35be81a18a7.png

2026-08-13 10:12:24 GMT

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@nprofile…s9qc Ah, I see. That sounds like the same concern that made UUIDs.
Thinking more along this way, I've seen intentionally reused ISBNs. I'm guessing that's because it costs something to get a bunch. UUIDs are completely gratis to generate, so there's no such temptation.
So it looks like UUID is superior in this aspect, except it doesn't come with a cental database.
I have a hunch that with crowdsourcing, a central database isn't needed any more, making UUID a viable alternative.

2026-08-13 05:51:29 GMT

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@nprofile…s9qc What were the functions for which ISBN was created?
When I came up with the idea, I was thinking that a central database is optional for an identification system. We have Libgen for publications, WikiData for everything, IMDB for movies, and other inofficial ones. I wonder if times have changed since ISBN and a simple identifier could work.
A centralized-knowledge, decentralized-maintenance database could also mean IPFS or blockchain. The latter also could solve financing.

2026-08-10 20:45:57 GMT

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@nprofile…9lg4 On a first glance, maybe? Is there a place I can get a handle for, uh, this post?

2026-08-10 20:42:41 GMT

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@nprofile…xj4x I just couldn't figure out how to get one. There was something about getting an organization name, but if that needs buying a domain, supplying proof of identity, and paying a fee, that's not much help :(

2026-08-10 18:02:55 GMT

Hey writers,
how about #ISBN, but decentralized?
Without the payment, the copyright, or the doxxing? For new #zines , manuals, novels; political, personal, or just chill? Digital and paper?
Is there any standard already which I just missed?
#books #writing #databases

2026-08-10 16:41:57 GMT

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Finally!
This was a lot more bugs and effort than I was expecting.
On the other hand, I never made a USB enabled device before, so maybe that's the cost of learning. I hope the rest goes easier.
https://cdn.fosstodon.org/media_attachments/files/117/072/199/475/847/783/original/5fc3c00197053eb1.png

2026-08-10 16:27:30 GMT

Achievement unlocked: Cross the USB data+ and - wires on the same board, twice.
Board failure unrelenting. I mean, unrelated.
#electronics #usb #microcontrollers

2026-08-10 11:13:01 GMT

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@nprofile…smh3 Mixed feelings. On one hand, mut restriction is something that's going to simplify my code. On the other hand, it adds more complexity to the language and puts nonobvious semantics on what used to be plain data fields.

2026-08-10 11:02:22 GMT

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@nprofile…hmeh @nprofile…wfat The magic of deep learning comes from the mind-boggling amounts of data. Breaking it down means breaking it, period. So not possible without hundreds of millions of dollars, unless we hit another breakthrough - but a breakthrough means we won't be talking about LLMs either way. So yeah, possible with another miracle.

2026-08-10 10:34:39 GMT

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@nprofile…hmeh @nprofile…wfat I think it would be a lot easier in the world of Cyberiad. Our world is "winner takes all" and, so far, only the winners could concentrate enough resources to afford LLMs. Free software is about distributing power, LLMs concentrate it. You'd have to redistribute power *before* LLMs happened to make them more equitable.

2026-08-10 10:31:22 GMT

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@nprofile…64hz Over lifetime of a human I'd say the cost is pretty high. It's 20+ years of energy-intensive training up front, waiting for any output.

2026-08-07 05:36:45 GMT

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@nprofile…sgjj @nprofile…mvm4 @nprofile…q3ex While the option of becoming a member is a good step, I got an impression that there were people who cared who didn't even know there was a vote. Perhaps more communication. Perhaps making every user a member. There's loads of shapes of governance to choose from, but I'm not an expert.

2026-08-05 14:23:11 GMT

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@nprofile…uad9 https://www.nationalgeographic.com/science/article/bicycles-air-pollution-health-new-york-city-columbia-university
> It is generally thought that the benefits of exercise outweigh the hazard of air pollutants, and a recent study suggests this is true in "the vast majority of settings.”

2026-08-05 14:11:09 GMT

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@nprofile…sgjj @nprofile…q3ex Preferably 30 days after the public announcement.
If they want to stick to the pluralism model rather than benevolent authoritarianism, then also proactively include users in the decision making as stakeholders.

2026-08-04 13:26:10 GMT

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@nprofile…fq8m What tool did you use to interpret the PROJ files?
I had some trouble defining the string in QGIS when I tried to do effectively the same thing: https://dorotac.eu/posts/flat_earth/
Where did you get the info that the format is deprecated? I can't quickly find any confirmation.

2026-08-04 12:54:44 GMT

Czy ktoś się wybiera na festiwal Conrada?
https://conradfestival.pl/
Chcę przybyć na pierwsze kilka dni, fajnie byłoby się spotkać, a wykombinować nocleg to w ogóle :P

2026-08-04 07:09:57 GMT

hey @nprofile…ctza mods, there are a bunch of accounts here that spam posts with some automatic tool without ever replying if you try to discuss the topic. It floods the local timeline and feels like they are advertising rather than building a community.
Are those something you want to know about?

2026-08-03 16:53:47 GMT

Writing your own ray tracer is fun bordering on wasting time.
Actually using it later to create #art by modifying basic parts of the tracer is so validating: I have the last word, world! My pointless experiments do lead to something!
https://gitlab.com/dcz_self/sciema
#graphics #programming #motivation #generalist #raycasting #raytracing

2026-08-03 12:58:38 GMT

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@nprofile…l8me I have nothing but respect to nouveau folks, even as I question the wisdom of doing free labor for a vendor that is hostile to the community's values.

2026-08-03 12:18:40 GMT

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@nprofile…l8me There's no shortage of reasons to hate nvidia. They still don't offer an open driver, and they infected the GPGPU landscape with their closed stack. The scientific computing needs are still expensive. That's before you get to their role in the recent hardware-related booms that many people view unfavorably..

2026-08-02 11:53:46 GMT

Potrzebuję pomocy od starych graczy, jak ja!
Polska, 1998.
Supermarket Marko.
Wielki kosz z płytami #CD pełnymi #shareware . Biorę Gry Labiryntowe i Gry Sieciowe od Albionu. Gram bez wytchnienia.
20 lat później, giną mi Sieciowe. Kto ma? Kto pomoże zgrać i zachować kawałek historii?
KTO MA SIECIOWE???
Co z nimi zrobię? To: https://archive.org/details/zreczno2
#digitalhoarder #hoarding #archive #DigitalPreservation #history

2026-08-01 13:09:07 GMT

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@nprofile…58ek Doors have been locked. Drink a verification can.

2026-08-01 12:22:47 GMT

So... How do I start a SHA-256 #git repository?
Can I convert an existing one?
Is there an easy alias for git init?
#versioncontrol #vcs #programming

2026-08-01 11:14:02 GMT

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@nprofile…w5un I agree! I think Codeberg has the best chance of succeeding against the monopoly, so I'm sad to see them do confusing moves.

2026-08-01 11:05:48 GMT

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@nprofile…w5un I see the "likely tolerated in practice" and I agree that short-term it's probably safe to keep there.
But then I have to consider the long term. This terms of service change came to me as a user completely out of nowhere, and both "likely" and "unlikely" also mean "we may change our minds".
By the time they do, I want my projects to be safe elsewhere cause I have enough problems to deal with.
So, as I interpret their actions and PR, codeberg is totally risky.

2026-08-01 10:54:51 GMT

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@nprofile…w5un How do you read it?
I see the context of literally "even if they were not LLM-generated", so I'm struggling to see what you see.

2026-08-01 10:45:21 GMT

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@nprofile…w5un No need for that at all. Just having no users is enough to be on shaky ground:
> the following use cases are discouraged [...]
> Side projects and experiments with little resource usage
https://blog.codeberg.org/protecting-our-floss-commons-from-llms.html#:~:text=the%20following%20use%20cases%20are%20discouraged

2026-08-01 10:36:21 GMT

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I no longer trust #Codeberg to host my projects no one else uses (at least thanks for being honest about that), so now I'm at #opencommit . We'll see how it goes.
#forge #git

2026-08-01 10:31:37 GMT

#KiCad + Dorota = plugin.
https://opencommit.eu/dcz/kyperspace
It helps you route tracks using 0Ω resistors. Because doing that manually is way too much clicking and accidentally lost work.
I've been told what I'm doing is fighting KiCad, but if the plugin gets me through this project, then I don't have to find another tool for a while.
#electronics #routing

2026-07-29 11:34:53 GMT

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@nprofile…dqv0 Claws Mail. It kinda sucks in how it crashes, but it's lightweight and fast and has nearly all the features.

2026-07-29 11:26:43 GMT

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I like the idea of participating in a long #bike trip like an audax. It's not a race! It's for fun!
But then it's always: please tell us your legal name, address, and a copy of your last tax report.
Organizers, that's not fun. It's bureaucracy. You don't need a name or address to cycle. I'm out.
So yeah, it doesn't look like I'll take part in any.
#bicycle #biketooter #cycling

2026-07-29 11:23:35 GMT

I just met a cyclist on a long-distance 4000km ride. Sounds awesome! I'd do it!
Then I check the website and see the reality of digitally-burdened world:
Participants must install the official tracking app. What app? There's no word about it. I think it's safe to assume it doesn't run on #Linuxmobile .
Presumably, it needs online access that I'd have to buy – I cycle offline.
Participants must follow the track. Checking the map is what I hate most when #cycling...
#bike #biketooter #Bicycle

2026-07-29 06:39:22 GMT

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@nprofile…72p6 That's about 4h cycling at cruising speed every day. 16% of you entire life. 25% of your all waking hours, assuming you cycle just the same in rain, heat, and winter. So in reality, more on most days.
HOW?
Do you have a time machine?

2026-07-26 07:24:51 GMT

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@nprofile…ddww Can't reply to toots
if you're a bot.
Amirite?

2026-07-26 07:22:29 GMT

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@nprofile…v673 I don't think that's entirely true. The reload loop clearly shows I can't be trusted with that much decision power.
Thanks, Cloudflare.

2026-07-24 09:58:25 GMT

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@nprofile…q3ex Out because I like to switch providers on my own schedule, rather than someone else creating an emergency for me to clean up.
Codeberg seems to me a bit unreliable considering the way they made the rule change. Not so suitable to make my new home. I'm very sad about it.

2026-07-23 14:25:20 GMT

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Thank goodness that's only an informal guideline, but when it goes into the formal rules, I'm out.
https://codeberg.org/Codeberg/org/commit/96fac426a32d1ba91ff879366d59bf1af54080c2

2026-07-23 14:24:49 GMT

#codeberg theory: no #LLM projects.
Practice: your non-LLM experiments will likely not get booted (but may still).
> So while the following use cases are discouraged (similar to private repositories), they are likely to be tolerated in practice:
> Side projects and experiments with little resource usage
> Specific tools and custom scripts that would be unlikely to find a community anyway, even if they were not LLM-generated
https://blog.codeberg.org/protecting-our-floss-commons-from-llms.html

2026-07-22 14:35:58 GMT

You can use a buck converter as a buck-boost converter. As in, get negative voltage.
I just checked. On paper. And guess what? They are nearly identical. The schematic of one turns into the other.
The only difference is the negative side of the input capacitor.
Mind=blown.
There are application notes for how to reconnect your converter, but even they don't notice it's THE SAME TOPOLOGY! https://www.ti.com/lit/pdf/slyt286
#electronics #smps #dc

2026-07-20 15:11:21 GMT

You need a 1234 GiB GPU to run your program?
Let me play you the tiniest... #microcontroller breakout board!
The 10-cent CH32V003 microcontroller and a single capacitor make a complete breakout board. Honestly, I didn't even need the PCB. The capacitor could be soldered directly on the pins.
I flashed it with the #Arduino . Not so "Nano" in comparison! #ESP32 for scale.
And it has #Rust support!
#rustlang #riscv #DIY #electronics
https://cdn.fosstodon.org/media_attachments/files/116/952/932/922/529/698/original/9f38dc618d2f64f8.jpeg
https://cdn.fosstodon.org/media_attachments/files/116/952/936/634/077/145/original/815d71dcded3f6a8.jpeg

2026-07-18 19:38:37 GMT

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@nprofile…nr0z That would be security by obscurity, but that gets broken too. Proof is all the challenge and puzzle websites where no one shares the actual code, yest they get solved.
Best OPSEC is never to communicate. Not between computers, not between humans :)
Also, bring back TempleOS :D

2026-07-18 11:46:27 GMT

#SSH be like:
> WARNING: connection is not using a post-quantum key exchange algorithm.
Dude, that's my #N900 with an OS from 2007. It's using #rsa and I had to make an exception in two places to even make you connect. On a private network.
#Quantum computers are the least problem here.
#cryptography

2026-07-18 07:15:39 GMT

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@nprofile…ddww Correction: unless someone posts a different link, cloudflare is stopping me from reading.

2026-07-18 07:14:38 GMT

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@nprofile…ddww Before I read the article, computation is a description of something that is happening. If you reect the notion that the computation on its own has meaning, remember that the computation describes *something real* underneath. Symbols don't exist in the air, but on a substrate that they actually influence.
When people say that the universe cmoputes, they don't mean that it manipulates symbols, but that transformation of matter are describable by computation.

2026-07-17 07:12:00 GMT

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@nprofile…dfml @nprofile…nxqh Impressive progress!

2026-07-17 07:11:34 GMT

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@nprofile…nxqh I always put the limit of "no thought given" ride at about 30km. No matter the weather or health, just go.
50km is 2 hours, so it's nice to have a goal or I'll find myself cutting it short.
Except in winter when 10km is enough to you freeze your fingers off. Anyone knows good gloves?

2026-07-17 07:05:25 GMT

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@nprofile…5a5d @nprofile…gpjx @nprofile…2m6h @nprofile…7jfr Persulfate was the first method that I found that promised relative safety, that I could easily obtain, and at the same time was adequately explained.
I could switch now, but then I'd have to spend the time tracking down the exact reactions and safety data sheets for disposing all results for both processes, not just one.
It does seem a bit slow, and I don't have all the disposal details pat down yet.

2026-07-14 12:13:50 GMT

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@nprofile…a793 How does that work?
This is the first season I reapplied lube but I never bothered to fully clean a chain.

2026-07-14 12:08:12 GMT

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@nprofile…gpjx @nprofile…2m6h @nprofile…7jfr I'm using the regular Bungard boards from Reichelt. I can never tell if that's called positive or negative. Exposed areas disappear.
For now, I'm warming it by pouring hot water to the bowl once or twice per board, and I'm agitating manually with the pictured tool. The good part is that I know immediately when it's done :P
But yeah, I'll have to find an aquarium heater.

2026-07-14 11:19:28 GMT

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@nprofile…feml Now I want to (re)build the laser engraver...

2026-07-14 11:17:28 GMT

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@nprofile…2m6h With 0.5mm wide traces, I wasn't worried about uneven etching, so I only looked at the PCB when it was nearly finished.
The reason the project didn't work yesterday is that I left the central chip at home -_-

2026-07-14 11:15:00 GMT

Say hello to my #PCB manufacturing lab. Here is the 3D printer showering the board in purple rays.
In those bottles live the necessary chemicals. Neutralize before disposing!
They go to trays where the board takes a bath. First, a minute in NaOH to develop, then (after a rinse in water), 20min of persulfate to etch away the copper. The big bowl holds warm water.
@nprofile…2m6h pics as promised!
#chemistry #electronics #DIY
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2026-07-14 10:24:53 GMT

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@nprofile…feml How often do you clean and wax? I'm gonna set myself a reminder to try the same...
Also, do you wax a brand new chain?

2026-07-14 09:38:00 GMT

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@nprofile…feml Okay, now you got my attention with those impossible results. How do you do the magic waxing?

2026-07-14 06:27:16 GMT

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@nprofile…z9vq A thousand times this! Make bikes look cool, or they won't gain critical mass. Muscle cars were called that because the term is cool, so taking it is a good start.
Also, when my bike gets acoustic, I apply oil. Quiet is good for a bike.

2026-07-14 06:24:05 GMT

My #bike chain got replaced today. It was new in February when I replaced the whole drive train.
So even though I wiped and oiled it every week, that chain was worth only about 4-5 months... Maybe 2000km? 9-speed, if that matters.
How often do you replace your chains?
#biketooter #cycling #bicycle #fedibikes

2026-07-14 04:58:25 GMT

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@nprofile…rjw3 Today, as a toothperson, I'm on the search for a new dentist because the old one stopped accepting cash.

2026-07-14 04:55:22 GMT

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@nprofile…5n7f Google told me in 2023 that my account may get deleted after 2 years of inactivity.
In 2025 it told me my account was active.
I keep getting emails about the account.

2026-07-11 13:35:13 GMT

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@nprofile…tg2e Turns out that many of the things we do to stay alive and have a fulfilled life waste resources and produce toxic materials.
The wisdom is in knowing what is bad to what degree, and how much is too much.

2026-07-11 13:16:57 GMT

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@nprofile…28kc Just found this on Hacker News: https://www.jeffgeerling.com/blog/2026/quadrf-can-spot-drones-and-see-wifi-through-my-wall/

2026-07-11 13:08:28 GMT

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Yes, I use a game controller instead of the #mouse. Try it, it's fun.
One day I will teach it to replace a keyboard.
#antimicrox #input #gamepad #keyboard

2026-07-11 13:07:07 GMT

Finite Element Analysis rabbit hole.
#PrePoMax works passably on Linux and with youtube tutorials (thanks Indian- and Polish-accent guys) I could actually simulate twisting a rod and do experiments. Easy to use for a total newb!
That informs me where to place strain gauges for one of my projects.
I promise all the random stuff I've been doing ties together, eventually.
#mechanics #FEM #FEA #numericalAnalysis
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2026-07-11 11:30:51 GMT

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@nprofile…2m6h Oh, it's cool to know how my results compare to others.
I learned to do 0.3mm traces by default. It is already kinda risky because when my method works, it works great, but half of the time one part of the board etches much faster than another and those 0.3mm traces get eaten before others separate properly.
I still need to get a good feeling for when this happens. One thing I know is that fresh solutions help.

2026-07-11 11:06:15 GMT

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Oh, I forgot the
- hand saw
- vice.
I am somewhat confident that notching and bending boards to break them results in a bad time while exposing.

2026-07-11 11:02:52 GMT

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@nprofile…2m6h I can take more on Monday :)
I don't think I would have bothered with toner transfer. With the 3D printer, several steps collapse into one. Plug in the USB stick with the design, new board in, 4 minutes wait, straight into developer solution.

2026-07-11 10:31:06 GMT

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Tools used:
- Photon Mono SE 3D printer
- electric kettle
- random plastic trays and glass jars
- pincers wrapped in rubber
- #KiCAD
- #UVTools
Materials as described by https://frgmnt.org/naps-etchant-chemistry/
If you're in Germany and want to learn, I can point you to a source of cheap used 3D printers.

2026-07-11 10:27:31 GMT

Rapid #PCB #manufacturing . Turnaround time: about 3h. Yield: 67%. Minimum resolved spacing: 0.1mm, thinnest trace: 0.2mm. Minimum not resolved spacing: 0.25mm :S.
Not pictured: days spent learning the craft, the simpler board with 7 failed attempts, the 3 or 4 really simple designs in between, the first attempt ever that worked flawlessly, pants stained with lye.
#DIY #electronics #chemistry
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2026-07-11 09:51:16 GMT

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@nprofile…7uys hey, I saw one just an hour ago! But between cars and houses. Wouldn't call that a good time.

2026-07-10 13:41:06 GMT

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@nprofile…35mp Oh, that's cool. I don't think I am going to use UART for this project, rather interrupts which detect peaks, but it's cool to know for the future.

2026-07-08 05:00:13 GMT

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@nprofile…7k5d @nprofile…n9uw Come to think of it, I'll actually have a thick steel core around which one half will be spinning. Never heard of steel core inductors though :D
Either way, I plan to ditch the DC component, thanks!

2026-07-08 04:58:34 GMT

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@nprofile…n9uw @nprofile…7k5d This is kinda promising, but I'd still need to have another coupling for the current return path. I could pass it through the frame and the bearings, but I don't know if greasy bearings conduct all that well, and I was told passing current through bearings isn't a good idea.
On the other hand, having two concentric cap halves on each side makes this a bunch more complicated - they'll couple to each other rather than the other side... or something.