Hacker News: anfractuosity

New comment by anfractuosity in "European scientists developed a tactile sensor capable of 100 μm resolution"

anfractuosity — Wed, 12 Aug 2026 20:17:06 +0000

Kind of related but using a different approach - https://www.youtube.com/watch?v=qtQ4rK66vlE ('This microscope uses touch')

Also see https://hira.hope.ac.uk/id/eprint/2869/1/Paper2_LowCostGelsi... for a DIY version.

New comment by anfractuosity in "IMAX vs. IMAX 70mm: The difference between these two cinema formats"

anfractuosity — Fri, 31 Jul 2026 22:04:47 +0000

Wouldn't line pairs / mm count as resolution.

New comment by anfractuosity in "IMAX vs. IMAX 70mm: The difference between these two cinema formats"

anfractuosity — Fri, 31 Jul 2026 21:59:50 +0000

Isn't the depth of field primarily determined by the aperture of the lens and focal length.

New comment by anfractuosity in "Darktable"

anfractuosity — Wed, 29 Jul 2026 18:03:59 +0000

Really like Darktable, was playing printing a few photos at weekend from it, on my large-ish dye-sub printer - DNP DS80, works very nicely under Linux with cups (once I figured out how to make it print in colour).

I switched to it from Lightroom and made a little Python script to copy photos based on their exif data, into the same file structure as Lightroom.

New comment by anfractuosity in "Darktable"

anfractuosity — Wed, 29 Jul 2026 18:01:54 +0000

Doesn't arch already package it (https://archlinux.org/packages/extra/x86_64/darktable/), I was using darktable on arch, but recently switched distros.

New comment by anfractuosity in "Recreate famous water profiles using supermarket bottled water"

anfractuosity — Thu, 21 May 2026 13:47:26 +0000

There's a process some brewers use to treat water, to make it similar to a well in England, called burtonisation, using various salts

Y-Zipper: 3D Printing Flexible-Rigid Transitions in One Click [video]

anfractuosity — Sat, 16 May 2026 12:02:03 +0000

Article URL: https://www.youtube.com/watch?v=AWig98GVIno

Comments URL: https://news.ycombinator.com/item?id=48159417

Points: 2

# Comments: 0

New comment by anfractuosity in "Nailing jelly to a wall: is it possible? (2005)"

anfractuosity — Wed, 13 May 2026 22:06:58 +0000

Maybe astronauts on the ISS could try a similar experiment ;)

New comment by anfractuosity in "Researchers print structural colour with an inkjet printer"

anfractuosity — Tue, 05 May 2026 21:03:13 +0000

Yeah, it's very cool, I found a rather interesting document on the chemistry to create a lippmann plate 'The True Colour of Photography' by 'Hans I. Bjelkhagen, Darran P.M. Green' seems their exposure times where in the order of minutes.

New comment by anfractuosity in "Researchers print structural colour with an inkjet printer"

anfractuosity — Tue, 05 May 2026 19:43:39 +0000

Sounds very interesting. Just started looking at the paper, which seems very complex to me "An alternative approach utilizes light absorption via localized surface plasmon resonances (LSPRs) of noble metal nanoparticles (NPs)".

I came across https://www.nano-resonance.com/ which appears to be the promotional page for the technique, it has a nice diagram which appears to show how the size of the silicon nanoparticle enhances certain wavelengths of light.

Very cool how they can use an inkjet printer for their approach.

Also see https://en.wikipedia.org/wiki/Lippmann_plate for a photographic process that creates colours using diffraction patterns.

https://www.youtube.com/watch?v=-DyrBDsKA5s is a fun video on lippmann plates.

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.