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Mark van der Velden

@dynom.nl
98 followers 54 following 503 posts

Technologist | Energy Systems | Security | Declinism holds us back | Kindness is underrated | Consider the 10k problem | 0.1337‰ BP 🌐 dynom.nl

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Mark van der Velden @dynom.nl · 22/09/2026
Onjuist, stond weldegelijk op de voorpagina, zaterdag rond 18:00.
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Mark van der Velden @dynom.nl · 23/06/2026
Het kan erger
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Mark van der Velden @dynom.nl · 01/05/2026
Dus als ik jou goed begrijp dan pakt de elektriciteitsmeter de som van Ln en indien het resultaat negatief is wordt het bij de export teller opgeteld en anders import?
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Mark van der Velden @dynom.nl · 20/01/2026
Daar hebben we het heel vaak over, elk jaar opnieuw, vooral zo rond de kerst. Maar de laatste tijd hoor ik vooral dat jonge meiden in het nieuws. Opwaartse trends zijn nieuwswaardiger denk ik. www.cbs.nl/nl-nl/nieuws...
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Mark van der Velden @dynom.nl · 18/01/2026
Not the most flattering position, but hey.
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Mark van der Velden @dynom.nl · 18/01/2026
PLA works fine for me. So does PETG. Figuring out the tolerances (X/Y slice parameters).
Small figurine with human-like joints in two colours. One hand pointing at the camera and the other raised in the air. Standing, without supports, on its own two feet
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Mark van der Velden @dynom.nl · 22/12/2025
I like these SN74AHCT125N, for the fast stuff, single digit ns switching speed. www.ti.com/document-vie...
Showing a SN74AHCT125N TTL gate PDIP sized
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Mark van der Velden @dynom.nl · 18/11/2025
Yeah.. I had a similar challenge 1.5 by 4 meters.
Three letters spelled WHY, made out of 20x20 cm light boxes each with their own colour
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Mark van der Velden @dynom.nl · 26/10/2025
@bsky.app why do I have to login so darn often? This is starting to become my most visited view of this app
The Bluesky login screen
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Mark van der Velden @dynom.nl · 01/10/2025
But.. but.. I like my beard 😭
Bearded man with pink eyewear, looking to his left
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Mark van der Velden @dynom.nl · 09/08/2025
#WHY! Dew drops on and in everything 😬
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Mark van der Velden @dynom.nl · 08/08/2025
But #why2025!
The letters WHY visible as shadow on grass
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Mark van der Velden @dynom.nl · 03/08/2025
Really.. it fits well! Also: Not the recommended way of playing with the badge! You can play Doom on it, I would recommend that over doing this. #WHY2025 #Badge
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Mark van der Velden @dynom.nl · 03/08/2025
I've gotten the question a few times now. Yes, the USB-c ports are a great fit. a Length of 6.5 mm is required for a *good* fit and most USB-c plugs are longer than that.
usbc plugs in different lengthsusbc plug shown plugged in, with a fraction of space in between.
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Mark van der Velden @dynom.nl · 02/08/2025
Photos and instructions are on the Printables page. Both vertical and diagonal works. Diagonal is (arguably) the nicest finish and strength, but takes up a lot of real-estate. www.printables.com/model/137231...
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Mark van der Velden @dynom.nl · 01/08/2025
Second to last dimensions check for the #WHY #Badge Cover. Fusion file and STL will be made available soon, a slightly earlier version is available at gitlab.com/Dynom/hardwa... Also checkout the model of @davedarko.bsky.social at www.printables.com/model/136919... Only 7 days until #why2025!
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Mark van der Velden @dynom.nl · 29/07/2025
(could've been one post, miss-clicked) I've orientated it at a 40° angle, this saves 65% material in supports. I've brought it down to 8 gram of filament for supports.
Back panel for the badge. Two bulges to cover the 18650's. Showing a 35° angle cover with organic supports on a build plate of a 3d printer
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Mark van der Velden @dynom.nl · 29/07/2025
tada.wav
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Mark van der Velden @dynom.nl · 28/07/2025
Pretty happy how these #lithophane light boxes came out. Managed to find a decent production flow in the end as well. Well in time before #why2025
Small lithophane light boxes, showing the unique WHY2025 logo design in three colours. They light up by usb (cables are barely visible in the back)
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Mark van der Velden @dynom.nl · 12/07/2025
The final preparations are starting. #why2025
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Mark van der Velden @dynom.nl · 11/07/2025
New toy
Rigol oscilloscope
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Mark van der Velden @dynom.nl · 12/06/2025
First batch done. The #WHY2025 colours are completely coincidental 🫣
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Mark van der Velden @dynom.nl · 11/06/2025
Diffuser design is ready, for the new "pixel boxes" Should probably think of a better name 🤔
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Mark van der Velden @dynom.nl · 01/06/2025
Klankroes 🕺 @ Cafe Kanaalzicht
Man with a beard, wearing klankroes.nl shades.
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Mark van der Velden @dynom.nl · 11/05/2025
Mijn weekend was ook vermoeiend, maar wel heel anders!
Jumping at an indoor jump area
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Mark van der Velden @dynom.nl · 10/05/2025
I'm getting royally pissed with the OpenADR alliance. It claim to be an "Open" specification, but so far there is nothing open about it. It's all behind a signup form and payment options (to get certified, test or participate). This is one way to get more specifications (XKCD 927).
Form field requires to agree to subscribe to the mailinglist in order to download its "Open" specification, to which you can unsubscribe "at any time".The options to address the person signing up is either Ms. or Mr.
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Mark van der Velden @dynom.nl · 10/05/2025
"My car is road safe, because it has seatbelts and an alarm system"
Text that reads: How is cyber security supported by OpenADR? -- OpenADR 2.0 supports ECC and RSA server and client certificates with TLS and XML wrapping functionalities.
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Mark van der Velden @dynom.nl · 15/04/2025
Leet.
Graph showing exchange rates, current rate of 1 euro = 1.1337 USD, showing leet in leetspeak.
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Mark van der Velden @dynom.nl · 14/04/2025
I'm no artist.. but: magic ✨🌈
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Mark van der Velden @dynom.nl · 12/04/2025
I've been using it for a while. It's fine and very portable. I don't use it for smd work, but with a decent adapter (60+W) it's a capable soldering iron.
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Mark van der Velden @dynom.nl · 05/04/2025
This was a great morning. After a game of chess, we tried to figure out why the bell rang when we flipped the switch.
A chess board and some electrical STEM education components.
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Mark van der Velden @dynom.nl · 24/03/2025
Grondig, dat ze die vertrekpassages testen op zeer gevoelige huid.
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Mark van der Velden @dynom.nl · 28/02/2025
Cool feature of #Android, however I do think it's unfortunate that this can't be blocked as a user permission.
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Mark van der Velden @dynom.nl · 08/02/2025
Assume she is technical and capable of breathing fire, by MiFare_Lady
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Mark van der Velden @dynom.nl · 29/01/2025
Idk, works fine?
Icon of Duck, the browser of Duck Duck Go.
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Mark van der Velden @dynom.nl · 19/01/2025
I'm missing a way to limit results to a certain time. "Anything of the last .." or along those lines.
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Mark van der Velden @dynom.nl · 13/01/2025
Made a model yesterday. I Still need to solve some scripting issues, but maybe I get it usefully parameterised once I figure those out. I don't know the word for thing I made, has something to do with the shedding of the stock of threads. Who knows the name of it? makerworld.com/en/models/98...
loom shedding thingy. It raises the top and lowers the lower warp threads to create space for the shuttle/insert, and switches when rotated the other way.
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Mark van der Velden @dynom.nl · 14/12/2024
#kbtr spotted
A graffiti piece by kbtr, showing the dom tower.
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Mark van der Velden @dynom.nl · 14/12/2024
Running various flow percentages to test ironing, it's easily something that can improve on the default.
Flow percentage range of 10-60% flow rate changes, of a 3D printed piece of PETG
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Mark van der Velden @dynom.nl · 06/12/2024
Always the exciting final moments when printing a bit more complicated models (round base) with Nylon (PA-CF)
3D printing a round base
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Mark van der Velden @dynom.nl · 05/12/2024
I want to use magnetic "pogo" connectors, i haven't found any nice ones yet. I think magnetic might work.
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Mark van der Velden @dynom.nl · 05/12/2024
I still want to build something like this.
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Mark van der Velden @dynom.nl · 05/12/2024
Oh, PEBCAk... This is one with addressable leds, with an ESP32C3 running wled
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Mark van der Velden @dynom.nl · 05/12/2024
I make all kinds of lamps, including this one, very basic, but can't upload a video for some reason..
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Mark van der Velden @dynom.nl · 04/12/2024
Tickets for #why2025 are in. Now the village stress begins! The #earlybird tickets are selling out fast! tickets.why2025.org
WHY 2025 order confirmation.
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Mark van der Velden @dynom.nl · 26/11/2024
A bit of a tacky name perhaps. But #squirt is a nice bicycle chain lubricant.
A small bottle of chain lube, with the brand name: squirt
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Mark van der Velden @dynom.nl · 26/11/2024
Oi.. who dis? A #why2025 poster at #RandomData
"Volunteers needed" reads the text on the WHY2025 poster, hanging on a closed door of a hackerspace.
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Mark van der Velden @dynom.nl · 16/11/2024
Tried to fix this Fisher-Price tape player. Still not at the quality it once was, but were getting there. Thanks #RepairCafe for the old-skool knowledge 🤘
A brown fisher-price portable tape player, and some repair tools left of it. The deck is over 35 years old and still works, after some TLC
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Mark van der Velden @dynom.nl · 15/11/2024
Ooh dear. Bsky is starting to crumble..
Notifications tab not loading any content
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Mark van der Velden @dynom.nl · 13/11/2024
My kids know me so well. #metal #head
Skull, drawn by a young child.
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