Nostr notes by Kris\Slyka

Increase your graphics performance 5 fold with this one simple ...

2026-09-15T11:15:28Z

Increase your graphics performance 5 fold with this one simple trick!

(It's switching to half precision floats for your frame buffers)

ok, one thing I gotta do I think is make a new viewfinder lens ...

2026-06-09T18:19:25Z

In reply to nevent1q…zjuk
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ok, one thing I gotta do I think is make a new viewfinder lens thing, cause the original one is missing. it works fine without, but I think having one is gonna be nice anyways. luckily I have some old lenses from those cardboard VR headsets that should do the trick

well, damn, it seems to just work… I mean, I'm still gonna ...

2026-06-09T16:53:50Z

In reply to nevent1q…a683
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well, damn, it seems to just work…

I mean, I'm still gonna twiddle the knobs, but, you know

well, that's kinda disappointing. it seems to just work. The ...

2026-06-09T16:07:03Z

In reply to nevent1q…x38p
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well, that's kinda disappointing. it seems to just work. The fact that the sync is way off is kinda expected since this camera usually gets it's sync from the video recorder it's connected to.

ohh no, the guy at the thrift store tricked me into buying ...

2026-06-09T15:34:13Z

ohh no, the guy at the thrift store tricked me into buying another dumb tube camera…

ok, so, I just had a major breakthrough I think? I realized that ...

2026-05-18T14:03:29Z

In reply to nevent1q…7qk6
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ok, so, I just had a major breakthrough I think? I realized that because the material I'm cutting in is transparent I can film through it using a microscope while cutting! Well, kinda, it's not the proper setup but I can mount the stylus upside down and drag a piece of polycarbonate over it and watch it cut! And from that it becomes very clear that there is a clear directionality to the embossing performance of the stylus because the tip is not actually perfectly symmetric. It seems to assume a kind of natural threefold symmetry during polishing?

#RecordLathe

I'm so tired… what is even happening? why are the top edges ...

2026-05-18T12:17:58Z

In reply to nevent1q…rwje
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I'm so tired…

what is even happening? why are the top edges of the grooves all scrungly and torn up?

Bad grooves! Tracks that skip! If you think you can find a good ...

2026-05-18T12:12:17Z

Bad grooves! Tracks that skip! If you think you can find a good sounding record at Big Slyka you can kiss my ass!

7 it's all nice and seven-y

2026-04-16T09:48:08Z

In reply to nevent1q…ekjd
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7

it's all nice and seven-y

Did you know that you can buy these funky little "flat" ...

2026-04-09T09:37:40Z

Did you know that you can buy these funky little "flat" CRT displays on aliexpress for like 25 bucks? They run on 12V and take composite video input. Not sure what I'm gonna do with it yet but I'm tempted to create some kinda handheld game thing? Or a scientific calculator? Imagine how cool a little RPM calculator running forth or something would be!

ok, I have acquired a cheap USB powered "Lithophane Led ...

2026-04-07T10:01:13Z

ok, I have acquired a cheap USB powered "Lithophane Led Panel" from aliexpress and I'm gonna see if I can turn it into a scan light for camera scanning. It's a lot brighter than my current light table, so this should really help get sharper and less noisy scans. the CRI probably sucks, but I'm only doing black and white so I don't really care.

I need some help from some kind of USB nerd here. Is there a ...

2026-03-17T09:02:09Z

I need some help from some kind of USB nerd here. Is there a class compliant way to connect a display over USB? And I mean actual USB, not display port alt mode.
According to the USB people there is a "USB Bulk Display Protocol Device Class" whose standard is maintained by VESA. But I can't find that anywhere and it isn't even mentioned on VESA's website. Is this actually a thing? Is this actually supported anywhere?

EDIT: I think I'm gonna look into GUD

it's doing the thing! :D ...

2026-01-16T22:15:48Z

it's doing the thing! :D

Aaaaand it's done. Kinda. But you can now fuck around with it ...

2026-01-07T17:30:37Z

Aaaaand it's done. Kinda. But you can now fuck around with it all you like.

https://git.sr.ht/~slyka/tinyvision

Improvements include:
* External clock support for a way more stable image. Optional, if you want things to be more wobbly.
* NTSC support. Maybe. Somebody please test this!
* Audio support! Yes, it does audio too!

I just made the mistake of looking at vintage ENG cameras on ebay ...

2025-11-19T19:04:45Z

I just made the mistake of looking at vintage ENG cameras on ebay and I can't express how attracted I am to this camera. it's… so incredibly hot °-°

can anyone here who touches technical drawings on the regular ...

2025-10-28T11:07:47Z

can anyone here who touches technical drawings on the regular give me some feedback on this? It's really only meant as a reference to hand in along a STEP file for CNC machining to let them know where to put threads. Keep in mind this was done using the freecad tech draw stuff so possibilities are kinda… limited but I still kinda want it to look nice and also be helpful for somebody who might want to machine this thing manually on a lathe and mill. And while I've looked at a lot of technical drawings I'm also not super familiar with all the standards and conventions.

wheeee! I've successfully made a glass PCB! 0.1mm copper foil ...

2025-06-28T14:15:22Z

wheeee! I've successfully made a glass PCB! 0.1mm copper foil laminated onto a microscope slide using two component epoxy and a hot roller laminator, coated with cheap aliexpress dry film photo resist and etched in copper chloride.

turns out that most of my struggles during etching came from my bad exposure setup. The light source was way too diffuse and I *way* over exposed the photo resist. Going from 7.5 minute exposures down to 20 seconds really helped and switching from a very diffuse UV exposure box to a UV spot light mounted around 50cm away finally got me to an acceptable result.

Of course the one that ended up working was on my ugliest piece of copper on glass laminate but whatever. It finally works!

#diypcb #electronics

hey fedi, anyone in the #berlin area interested in a free ...

2025-03-02T16:16:23Z

hey fedi, anyone in the #berlin area interested in a free soundcraft compact 10 mixer which has only been very slightly on fire? I've been meaning to get around to maybe fixing it for ages but I just don't have the spoons. Even if you don't wanna fix it it's a lifetime supply of potentiometers and jacks.

I just need to get it out from under my living room table and stop thinking about it and it feels too nice to throw away…

looks like youtube just rolled out an update. same thing ...

2024-12-20T19:52:49Z

In reply to nevent1q…m08g
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looks like youtube just rolled out an update. same thing happening to me

yeah, that was the idea. I don't think patterning ITO glass ...

2024-11-12T17:00:02Z

In reply to nevent1q…dl5z
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yeah, that was the idea. I don't think patterning ITO glass is super complicated but it would definitely be a lot easier to use a patterned PCB in the back. Maybe even just with some 7 segment like exposed bits

wheee, it's reversible when you use two stainless steel ...

2024-11-12T16:21:22Z

In reply to nevent1q…ntup
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wheee, it's reversible when you use two stainless steel electrodes! cyanotype e-paper when?

imagine combining this with a patterned PCB with contacts and a ...

2024-11-12T15:47:17Z

In reply to nevent1q…n9k4
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imagine combining this with a patterned PCB with contacts and a piece of ITO glass to make some kinda cyanotype e-paper display?! that would require getting the re-oxidation to work though

so, I was talking to a friend about electrochromic paper, paper ...

2024-11-12T15:43:27Z

so, I was talking to a friend about electrochromic paper, paper that changes color in response to electricity, after seeing some old fax machine and audio recorder patents that mentioned it.

They use potassium ferrocyanide mixed with potassium cyanide (yikes…) which turns paper black when electricity flows through it. I tried it with just potassium ferrocyanide and it kinda worked, but sucked.
But that got me thinking about prussian blue, the pigment created in blueprints/cyanotype. It can exist in two different oxidation states, one of them is colorless and the other is blue. Could you electrochemically reduce the blue pigment into the colorless version?

You can! As long as the paper is slightly damp you can rest it on top of a conductive surface (I used a piece of SMD stencil) connected to around 25-30V and run the ground lead over the paper which will leave a white line in the pigment! It doesn't seem to be reversible though, or at least I can't get any current to flow in the opposite direction…

for #freecadfriday some screenshots of my record lathe as ...

2024-09-13T11:42:30Z

for #freecadfriday some screenshots of my record lathe as it's nearing completion and release. can't wait to port this over to 1.0 once it's out and make use of all the assembly features

thanks! The stereo channels are cut at a 45° angle, with one of ...

2024-09-11T20:38:08Z

In reply to nevent1q…nz22
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thanks! The stereo channels are cut at a 45° angle, with one of the channels phase inverted so that a mono signal results in a purely horizontal motion. what you're seeing there is the final product. this was a run of records where each record had it's own unique track on it. cutting masters for pressing is it's own whole thing

yeah, it's completely built from scratch using mostly off the ...

2024-09-11T15:20:19Z

In reply to nevent1q…mqnk
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yeah, it's completely built from scratch using mostly off the shelf parts, some 3d printing, concrete casting, laser cutting and some lathe work. It's a three axis machine, one rotary axis for the table and two linear axis for moving the head left and right and up and down. It's not really sensitive to external noise but it is sensitive to vibrations. Running a desk fan on the same table is definitely audible. All the motors are vibration isolated with 3d printed TPU dampers.

making records for @npub1cjd…frs7 and ...

2024-09-11T12:54:26Z

making records for Ka)))ta and To)))m (npub1cjd…frs7) and https://dreamanderror.com/ which opens tomorrow! you should go check it out if you're in berlin, it's really cool and there will be books with these records inside! and I might be there too, spoons permitting

EDIT: I have just been informed that the records won't be in the books but will be separate, which is good for people who hate reading I guess…

#RecordCutting

I also made a little animation to show the resulting groove and ...

2024-08-31T19:31:09Z

In reply to nevent1q…ha6n
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I also made a little animation to show the resulting groove and how it's read by the stylus on the record player

a while ago I made a little animation illustrating the working of ...

2024-08-31T19:29:01Z

a while ago I made a little animation illustrating the working of the stereo record cutting head I made and I just updated it to the latest version of the head. the movement is strongly exaggerated so you can actually see the movement.

finally, analogue CDs wii shop theme remix by @npub179q…yhd8 ...

2024-08-26T11:07:34Z

finally, analogue CDs

wii shop theme remix by miunau (npub179q…yhd8)

god, me too. I can't wait to be "done" with this ...

2024-08-21T19:11:20Z

In reply to nevent1q…pk08
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god, me too. I can't wait to be "done" with this thing any do literally anything else for a while

some more microscope shots of slowly getting closer to working ...

2024-08-21T16:53:20Z

some more microscope shots of slowly getting closer to working stereo on my record lathe cause apparently people are into that kinda thing