Posts by kbob@chaos.social
(DIR) Post #AhpuN7HOJbDRs0wALI by kbob@chaos.social
2024-05-13T01:30:10Z
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The old design was up in the kitchen for a couple of months. But the magnets in their little cassettes kept coming loose and glomming onto each other. So I designed this one with no cassettes. The magnets are just press fit into the main pieces. We'll see how that works long term.
(DIR) Post #AjgGjDZy4sUlN9rCfQ by kbob@chaos.social
2024-07-07T07:44:04Z
1 likes, 0 repeats
@notjustbikes @lanodan To the extent that it's "more likely to drive dangerously", that should also lead to an increase in bike fatalities at that age, which doesn't show in the data. I think it's almost all driving inexperience.In any case, thanks for sharing this data.
(DIR) Post #AmFPZUyBMAdklMUzdA by kbob@chaos.social
2024-09-22T02:30:48Z
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@10leej @chrishuck Hey, I drove past that stack yesterday. My parents' next door neighbor worked there in I think the 1980s.
(DIR) Post #AnNPz83TjHtsftf1Wq by kbob@chaos.social
2024-10-25T13:35:10Z
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I don't see this on Prusa's 'blog yet, but I got email notification this morning that Prusa is now manufacturing MK4S printers and Prusament at PrintedSolid in the US.I'm not sure I see the point. The US-made printer is $90 more expensive, and shipping from Prague is usually pretty fast for less than $90.#Prusa #3DPrinting @3dprinting
(DIR) Post #ApTTkTwd45fugGzvqi by kbob@chaos.social
2024-12-27T13:45:43Z
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@andymoose Good luck finding a group of senior devs that can speak with one voice. They won't even form a union.
(DIR) Post #ArX2Pm4Ho4hmlYzjIO by kbob@chaos.social
2025-02-27T03:56:28Z
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@frameworkcomputer Who wore it better?
(DIR) Post #Asqx47E25YyIFzJCSm by kbob@chaos.social
2025-04-07T12:08:15Z
1 likes, 0 repeats
@aliss Corporate directive that all developers use VSCode?
(DIR) Post #AvDHxGFHijMXcwdA3s by kbob@chaos.social
2024-11-30T00:51:41Z
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@jasoncoon of Evil Genius Labs sent me his new 8x8x8 LED Cube. This is a volumetric display made of 512 WS2812 LEDs and a PixelBlaze inside a frosted acrylic box. It was a kit; I soldered and assembled it over the last two days. The PixelBlaze came with many preprogrammed effects, including these three.It looks even better in person -- the camera oversaturated on the bright parts.#Blinky #WS2812b
(DIR) Post #AvDHxH3chZd294BMWW by kbob@chaos.social
2024-11-30T00:55:47Z
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I refrained from showing Munching Cube in the video, though one of the preloaded patterns is similar.@jasoncoon is selling these on Tindie if you want a box of light in your own life.https://www.tindie.com/products/jasoncoon/led-cube-8x8x8/
(DIR) Post #AvDHxHzPEjqj2HDVaa by kbob@chaos.social
2024-11-30T01:00:16Z
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PSA: the company Evil Genius Labs is a lie! @jasoncoon may be a genius, and he might even have a laboratory, but he completely fails at evil. He's the extremely responsive, helpful, anti-evil bespoke product vendor we most want to work with.@jasoncoon #NameDoesNotCheckOut
(DIR) Post #AvDHxJ5p8MZqSTE9EO by kbob@chaos.social
2025-05-29T14:13:10Z
1 likes, 0 repeats
@jasoncoon I made my LED cube match my avatar!Stupid LED tricks...#Blinky #EvilGeniusLabs
(DIR) Post #AvDHxRkWwttNJ2Kln6 by kbob@chaos.social
2025-06-17T01:25:15Z
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@jasoncoon I'm finally getting into writing shaders for my PixelBlaze/Evil Genius Labs LED cube. I call this one Bubble Phi. I uses the R₂ low discrepancy sequence to pick the colors, thanks to @mbr for showing it to me. (I've used R₁ color sequences in other projects.)#EvilGeniusLabs #PixelBlaze #LED
(DIR) Post #Ax8C74RNZzzz4Uus7M by kbob@chaos.social
2025-08-13T04:00:46Z
3 likes, 0 repeats
Today we got our dishwasher fixed under warranty. To diagnose it, the tech stuck a photosensor+magnet onto the front panel over the green status LED and started reading diagnostics. It turns out the status LED is actually a serial port*, and it's continually transmitting status.I can think of so many gadgets that could and should use this trick...*It's probably something other than regular serial -- a UART's TX would flicker. I don't know any details.#HidingInPlainSight
(DIR) Post #Ax8C75z5q8YprLhJJ2 by kbob@chaos.social
2025-08-13T12:12:18Z
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Effectively, this is an opto-isolator. Except it's not all in one device. Wikipedia has a good article on them, and notes that they can manage 10s of KHz. (See MIDI.)The nice thing is that there's zero extra hardware -- every gadget already has an LED or seven, and if your MCU has a spare DMA channel, you can stream a bitstream to it (however it's encoded) with low overhead. If it's a short status message, you can just let the DMA loop over it and there's no MCU overhead.
(DIR) Post #Ayz7XEFSX1RK4WroG0 by kbob@chaos.social
2025-10-08T02:10:35Z
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@tomjennings @masek The current Arduino IDE checks for board and library updates every time you launch it.If I were intent on evil, I could see a few ways to use that. I could issue malicious updates or just malicious license changes. I could demand subscription fees to keep it working. Or I could just refuse to let 3rd parties ever update their boards and libraries and let the whole thing rot.Replacing the Arduino IDE is a bigger deal than the hardware.
(DIR) Post #B0PwtyUE6YPkXhYhv6 by kbob@chaos.social
2025-11-19T19:29:09Z
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Posted by Adafruit on LinkedIn. (sorry for the LinkedIn URL)https://www.linkedin.com/posts/adafruit_opensource-privacy-techpolicy-activity-7396903362237054976-r14H/Summary: Qualcomm has rewritten the Arduino terms of service, removing reverse engineering permission, adding surveillance and EU-illegal data retention.#qualcomm #arduino #Adafruit
(DIR) Post #B0qIQlk9DBfCUGVCT2 by kbob@chaos.social
2025-12-02T13:28:49Z
1 likes, 1 repeats
I printed a fake disk drive.I noticed that my NAS's empty slots were letting a lot of airflow through without cooling the actual disks. So I made dummy disks to fill the slots. The average drive temperature went down by almost 1℃.Tagging @briancmoses because he likes this kind of thing.🧵 1/N#NAS #TrueNAS #3DPrinting
(DIR) Post #B0qIQtS0YVuIOK4pIu by kbob@chaos.social
2025-12-02T13:29:51Z
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I published it on Printables, of course.https://www.printables.com/model/1501413-35-inch-disk-drive-dummy🧵 2/N#Printables
(DIR) Post #B0qIR1KVGIeopMcwiW by kbob@chaos.social
2025-12-02T13:37:38Z
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This disk drive has horizontal screw holes. Here's how I modeled them. They have four crush ribs and a maximum overhang of just over 45°.Tagging @rahix because he's The Man of functional prints.EDIT: also tagging @amd because he's done some work on this.🧵 3/N #3DPrinting #FunctionalPrint
(DIR) Post #B1ggyTwCgfo6hKQ9Q0 by kbob@chaos.social
2025-12-27T22:20:46Z
1 likes, 0 repeats
Time to unfollow the 39C3 hashtag, I guess. I made it through day 0.