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dorotaC

@dcz.fosstodon.org.ap.brid.gy

13 followers 0 following 400 posts

Greybeard but revolutionary. 80-char lines are good for museums. My tech writing (hire me): dorotac.eu Open bike computer: jazda.org dcz on libera.chat 🌉 bridged from ⁂ fosstodon.org/@dcz, follow @ap.brid.gy to interact

Posts Replies Media

dorotaC @dcz.fosstodon.org.ap.brid.gy · 16h

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

dorotaC @dcz.fosstodon.org.ap.brid.gy · 21h

#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 […]

Original post on fosstodon.org

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 23h

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 […]

Original post on fosstodon.org

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 03/10/2026

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?

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 03/10/2026

#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

dorotaC @dcz.fosstodon.org.ap.brid.gy · 23/09/2026

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

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 20/09/2026

#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 […] [Original post on fosstodon.org]

"accept notification request".
"You're about to accept one notification request. Are you sure you want to proceed?"

dorotaC @dcz.fosstodon.org.ap.brid.gy · 18/09/2026

#mpv is recently making my laptop's #backlight go nuts. It's *really* annoying. Does anyone know what might be causing this and how to stop it? --target-peak=203 does nothing. #linux #video #laptop

dorotaC @dcz.fosstodon.org.ap.brid.gy · 16/09/2026

Hey #feditronics , my #pizza was underbaked due to this thing. What is it called? It's a "PWM" switch from my oven. It switches off the power after some time, and then it switches on again. On the other side, the dial sets the interval. Only 2 pins of 230VAC […] [Original post on fosstodon.org]

A device made of many metal pieces. There are two screw ends attaching it to some backplate. There's many parallel long pieces of thin metal. A spring contact inside, and a circular thing insulating contacts.

dorotaC @dcz.fosstodon.org.ap.brid.gy · 12/09/2026

Silly way to waste time: write a #web scraper. 400 LOC, but I cheated and used a library for finding links. Took about one morning. #programming

dorotaC @dcz.fosstodon.org.ap.brid.gy · 06/09/2026

So... what is a "push notification"? I heard this term in mainstream media, so I'm interested in a non-technical definition. www.ibm.com/think/topics/push-notif… IBM says that it's a popup from the OS, but it tracks them only to 2008, whereas "Activate your Windows XP" popup […]

Original post on fosstodon.org

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 28/08/2026

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

A picture of colorful jumper wires.

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 24/08/2026

#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.

dorotaC @dcz.fosstodon.org.ap.brid.gy · 22/08/2026

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

dorotaC @dcz.fosstodon.org.ap.brid.gy · 22/08/2026

#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 […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 15/08/2026

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

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 13/08/2026

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

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Reposted by dorotaC

Our Wonderful Green Future @owgf.mastodon.world.ap.brid.gy · 13/08/2026

Cities aren't LOUD CARS ARE LOUD #Urbanism #BikeTooter #Cycling #TheWarOnCars Great video by u/MiserNYC- on Reddit

dorotaC @dcz.fosstodon.org.ap.brid.gy · 13/08/2026

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 […] [Original post on fosstodon.org]

A circuit board with a smaller board soldered on in the center. The smaller board is covered with gray metal and says ESPRESSIF. Golden, and it has no solder mask. It's all scratched and with splotches of solder around. A resistor is standing on its side. There is a USB port and several free cables attached to spots on the other side. One soldered directly on another component.

dorotaC @dcz.fosstodon.org.ap.brid.gy · 10/08/2026

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

dorotaC @dcz.fosstodon.org.ap.brid.gy · 10/08/2026

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

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Reposted by dorotaC

chris actual @lackattack.mastodon.social.ap.brid.gy · 10/08/2026

A #haiku in honor of the bee who got caught in my glasses and stung me in the eyebrow during my #bike ride. He must have been a #bee of significance, because my eye is still on fire from that little effer's A+ bee venom. I'm sorry poor bee We collided, you stung me Now I'm sad you're gone

dorotaC @dcz.fosstodon.org.ap.brid.gy · 04/08/2026

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

conradfestival.pl

Conrad Festival

Święto literatury światowej. Festiwal gości artystów z całego świata, reprezentantów różnych kultur i światopoglądów, związanych nie tylko z literaturą, ale też

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 04/08/2026

hey @fosstodon 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?

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 03/08/2026

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! gitlab.com/dcz_self/sciema #graphics #programming […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 02/08/2026

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 […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 01/08/2026

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

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 01/08/2026

#KiCad + Dorota = plugin. 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 […]

Original post on fosstodon.org

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 29/07/2026

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 […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 23/07/2026

#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 […]

Original post on fosstodon.org

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 22/07/2026

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 […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 20/07/2026

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 […] [Original post on fosstodon.org]

An 8-pin black chip on an 8-pin green breakout board. A capacitor straddles over one pin, connecting two nonadjacent ones.

The previous microcontroller board, alongside an Arduino Nano which is like 6 times the area (a red USB cable plugged in), and also an ESP32 devkit (one plugged USB cable). All three hanging on a metal clamp.

dorotaC @dcz.fosstodon.org.ap.brid.gy · 18/07/2026

#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 […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 14/07/2026

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 […] [Original post on fosstodon.org]

Several bottles and jars of different sizes on a shelf. The shelf says "PCB etching". The bottles are 500ml max, and dark. Small jars, one with transparent liquid "Na₂S₂O₈", another with a brown liquid inside "...waste". Other 3 visible bottles have "NaOH".

A resin 3D printer. The printer is open. The build plate is not present, and the gantry is lowered. The screen is shining violet. There's a small square on the screen.

A plastic tray lies inside a large flat chipped glass bowl. Inside the tray, a golden square is immersed in a blueish liquid. The lid of the tray says "Na₂S₂O₈ PCB USED".

A plastic tray with a brown liquid inside. There's a metal flat pincette lying on the tray. The lid says "NaOH 1% PCB USED". It's on a red brick table.

dorotaC @dcz.fosstodon.org.ap.brid.gy · 14/07/2026

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 […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 11/07/2026

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 […] [Original post on fosstodon.org]

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 11/07/2026

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 […] [Original post on fosstodon.org]

Two basic printed circuit boards, stack on top of each other. Copper is shining a golden color, a green substrate shows in between. There are many pads and traces of different sizes. Almost all of the area is copper, the substrate only occasionally. One of the boards shows "v3.2.2". There don't seem to be any unintentional breaks or bridges. The second board, lying on top, doesn't shine so nicely, due to some dirt maybe.

dorotaC @dcz.fosstodon.org.ap.brid.gy · 05/07/2026

#electronics . I want to use a coil to send low-speed data across an air gap (rotary transformer). Searching the web, it looks like I'm the first one with this idea. 5V, low power sender, 20Hz times 2 bytes. 2-5 cm diameter, 5mm gap. I know I need to drive it with AC (FM?), but how do I receive? […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 05/07/2026

Days since falling off the #bike: 0. 4/7 would do it again.

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 27/06/2026

Hey #electronics . Can I merge decoupling #capacitors ? Pictured: 3 1µF caps in parallel. One for VCC One for AVCC One is a filter for the power supply It feels like they are all doing the same job and occupying space for no reason. What am I doing wrong? #askfedi #hacking

Screenshot from a CAD program showing 3 capacitor footprints next to one another.

dorotaC @dcz.fosstodon.org.ap.brid.gy · 26/06/2026

Working on my new entry for single-layer #PCB championship. No through holes. No vias. 3D design: overlapping components. Board edge is a suggestion. 2nd layer is actually not on the PCB but in hyperspace. All #SMD . Even audio jack, after flipping on its back […] [Original post on fosstodon.org]

A screenshot of a PCB design in KiCAD. It looks messy.

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Reposted by dorotaC

ꙮ 𝄃𝄁𝄂𝄀𝄀𝄁𝄃🇫🇯🇱🇨🇱🇧 @liilliil.mastodon.online.ap.brid.gy · 25/06/2026

Зелёная 🍃 волна 🌊 для велосипедистов 🚴‍♂️ в Нью-Йорке 🇺🇸 #велосипед #bicycle #bike #greenwave

dorotaC @dcz.fosstodon.org.ap.brid.gy · 23/06/2026

What's the lowest-power #RISCV #microcontroller ? I'm planning to use the low-power core of ESP32-C6 for #jazda (no less than 7µA), but I'm sure there are cores that go lower than that. Also, I'm running out of I/O pins on the -C6 and I might need to augment it with a "south bridge" […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 17/06/2026

Bike-train-camping is fun. Makes ticket sellers laugh. Seller: "what's the destination?" Me: "I'll get off wherever the train arrives at 19:00". This amused cashier didn't sell me a ticket going until 19:00 for whatever reason :( I got one at the next stop. #bike #camping #biketooter #trains […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 15/06/2026

Does your #phone support #induction #charging ? Do you have an induction stove? You can transfer the energy of a whole battery charge to your phone in under a minute! Put your phone on the stove and set it to boil. The powerful coil on your stove can support even 2000W of power! You'll never […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 13/06/2026

Wikimedia #Commons ' idea of thongs: where human insight and artificial intelligence cancel each other out. #electronics #searchEngine #programming #databases #footwear

Wikimedia Commons search results for "thongs". It shows a pair of thongs (footwear) and a diagram for a set-reset circuit.

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 13/06/2026

Pozdro po pierwszym dniu @rustmeet ! W nocy nawiedził mnie duch konferencji i przedstawił się jako RustMajt. A może moje wczorajsze grzybki były nieświeże.

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 10/06/2026

#CD #archival tip: if your drive is so tired of a bad CD that it spits the CD out... push the CD back in! Maybe in a different position. Literally. I moved the drive from the floor on the bed and the disc keeps #ripping now. Or maybe it was `--scsi-timeout=1000`. Either way, CD is cracked but […]

Original post on fosstodon.org

dorotaC @dcz.fosstodon.org.ap.brid.gy · 08/06/2026

Does anyone have experience #archiving CDs with redumper? I get some SCSI errors that show up as SKIP, but `redumper refine` seems to ignore them... The refine run took care of C2 errors at least. #CD

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dorotaC @dcz.fosstodon.org.ap.brid.gy · 07/06/2026

Put up my #parents' stuff for sale online. Watching them try to find their way around the modern mobile ecosystem. OMG I never suspected it would be so painful and confusing. What is a web browser? Go to the ads? Is this in email? ...#Gmail is following links and acts as a web browser. How can […]

Original post on fosstodon.org

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