Hacker News: anfractuosity

New comment by anfractuosity in "Ask HN: Any interesting niche hobbies?"

anfractuosity — Wed, 08 Apr 2026 19:43:24 +0000

That sounds really cool, how did they do the DNA testing out of interest?

The nifty Japanese printing gadget uniting artists worldwide

anfractuosity — Tue, 07 Apr 2026 19:37:55 +0000

Article URL: https://www.theguardian.com/artanddesign/2026/apr/07/nifty-japanese-printing-gadget-risograph-riso-club-gabriella-marcella

Comments URL: https://news.ycombinator.com/item?id=47680325

Points: 4

# Comments: 0

New comment by anfractuosity in "A sea of sparks: Seeing radioactivity"

anfractuosity — Mon, 30 Mar 2026 21:26:10 +0000

https://dberard.com/home-built-stm/ shows individual atoms.

New comment by anfractuosity in "Is it a pint?"

anfractuosity — Mon, 23 Mar 2026 19:00:15 +0000

Maybe it was a Czech Mlíko pour ;) The faucets they use are pretty cool (https://www.lukrfaucets.com/en/)

New comment by anfractuosity in "Microscopes can see video on a laserdisc"

anfractuosity — Mon, 09 Mar 2026 23:50:14 +0000

I have a magneto optic sensor that can visualise the field lines of a magstripe when using a polarising microscope - https://www.youtube.com/watch?v=c8nM4Z-hkTw

I'm going to try a VHS under it, to see what I get.

New comment by anfractuosity in "Raspberry Pi Pico as AM Radio Transmitter"

anfractuosity — Wed, 04 Mar 2026 20:01:40 +0000

Based on a repo I found that twiddled the memory bus, I transmitted audio from a wav file via Pulse Density Modulation - https://github.com/anfractuosity/musicplayer

New comment by anfractuosity in "Raspberry Pi Pico as AM Radio Transmitter"

anfractuosity — Wed, 04 Mar 2026 19:44:45 +0000

If you PWM a signal, I presume you could add a filter to convert to amplitude changes?

New comment by anfractuosity in "PCB Tracer"

anfractuosity — Fri, 27 Feb 2026 22:24:52 +0000

I skimmed through a couple of youtube videos, would I be right in thinking the tracing is done always manually here.

Would be really neat if it could trace automagically too, possibly with sanded PCBs?

New comment by anfractuosity in "Ask HN: Are there examples of 3D printing data onto physical surfaces?"

anfractuosity — Wed, 18 Feb 2026 21:08:40 +0000

Wow that printer is fascinating!

Good point re. film, related to that see - https://archiveprogram.github.com/arctic-vault/

New comment by anfractuosity in "I overengineered a spinning top [video]"

anfractuosity — Wed, 28 Jan 2026 21:56:42 +0000

Thanks! I came across http://www.pocketwatchrepair.com/how-to/jewels.php recently, hadn't realised the jewels weren't for aesthetics.

New comment by anfractuosity in "Time Station Emulator"

anfractuosity — Tue, 27 Jan 2026 23:33:22 +0000

You can apparently lock shopping trolleys using the same kind of principle - https://www.tmplab.org/2008/06/18/consumer-b-gone/

And https://www.youtube.com/watch?v=LmSyb0kBvGE

New comment by anfractuosity in "OpenFlexure Microscope"

anfractuosity — Mon, 26 Jan 2026 20:15:53 +0000

Another 3D printed microscope https://github.com/TadPath/PUMA looks very interesting too.

New comment by anfractuosity in "The Science of Fermentation [audio]"

anfractuosity — Mon, 26 Jan 2026 07:24:44 +0000

Thought that podcast was very interesting. I bought the book - 'textbook of sake brewing' a while ago. I've brewed beer before, but rather fancy trying making sake.

New comment by anfractuosity in "€5k Swiss cameras with zero electronics"

anfractuosity — Mon, 19 Jan 2026 22:54:36 +0000

I remember speaking to ALPA at a photo show, from what I recall the cameras also have very fine metal shims to align the camera to a digital back.

Do they manufacture the optics themselves too? Not sure I realised that.

Edit: just found this "ALPA cooperates with the acknowledged best manufacturers of large format lenses"

New comment by anfractuosity in "Find a pub that needs you"

anfractuosity — Wed, 14 Jan 2026 18:30:25 +0000

Great idea!

https://www.mirror.co.uk/money/personal-finance/finance-expe... shows how little pubs make per pint, very sad.

If anyone's curious about cask beer https://www.youtube.com/watch?v=_ud_eTwY4nc&list=PLyDTS7ZG3z... is a very interesting youtube video series by The Craft Beer Channel.

New comment by anfractuosity in "Ask HN: What are you working on? (January 2026)"

anfractuosity — Sun, 11 Jan 2026 18:58:44 +0000

Sounds fascinating, do you have any documentation on how you modify the yeast?

New comment by anfractuosity in "Ask HN: What are you working on? (January 2026)"

anfractuosity — Sun, 11 Jan 2026 18:45:47 +0000

Trying to visualise magnetic fields of a floppy disk.

So far I can see magnetic fields on a magstripe https://www.youtube.com/watch?v=c8nM4Z-hkTw with two polarisers (one of which I rotate in the video, which is contained in a 3D printed holder with gears I made).

I'm awaiting some different polariser film, to see if I can get it to work with a floppy disk.

New comment by anfractuosity in "Drones that recharge directly on transmission lines"

anfractuosity — Sat, 10 Jan 2026 19:26:02 +0000

Remember seeing this a little while ago too - https://www.fastcompany.com/91089861/this-genius-vampire-dro...

https://www.youtube.com/watch?v=C-uekD6VTIQ has a video of their drone on a power line.

New comment by anfractuosity in "Ask HN: What are you working on? (Jan 2026)"

anfractuosity — Sat, 03 Jan 2026 22:58:11 +0000

With OpenSCAD I've made a 3D printed rotatable polariser for my microscope - https://github.com/anfractuosity/polarisers

I used these two polarisers in my microscope and a magneto-optical sensor (which exploits the faraday effect), to visualise magnetic field lines of a magstripe card - https://www.youtube.com/watch?v=c8nM4Z-hkTw

I intend to try to use with a floppy disk, however it's not currently working for that.

New comment by anfractuosity in "OpenSCAD is kinda neat"

anfractuosity — Sat, 20 Dec 2025 18:40:07 +0000

It's super useful, been using with my 3D printer to print things such as an adapter to connect a Canon EF lens to night vision tube and parts to link motorised linear stages together.

Currently I'm playing with a gear library which is part of BOSL2 (https://github.com/BelfrySCAD/BOSL2/wiki/gears.scad), to make something to rotate a polariser in my microscope.