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[Design] Let's talk about Unit Tests, Measuring, and a CAD approach
  • A good photo can really go a long way. Back up and zoom in as much as possible to reduce perspective distortion. Try to get the camera square to the part.

    Another nice trick for small parts with a flat face is a flatbed document scanner. Unlike a camera, the scanner ensures no perspective distortion. They also have a known scale (the DPI). Or, for more accuracy, you could calibrate the scale factor by scanning a ruler.

  • How much does string thickness matter?
  • It makes way less difference to the sound than most people think. In a blind test with different string gauges, I think few people would be able to tell which is which.

    Also be aware that changing string gauge also changes the tension. You will need to readjust intonation, spring tension (unless you have a fixed bridge), and possibly truss rod.

    For a beginner, I would highly recommend sticking with the standard 10-46. Aside from the adjustments needed, heavier strings are also a bit harder to play. Even as an experience player, I find zero benefit of heavier gauges.

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  • If milk jugs are acceptable, that's probably a better option anyway. I don't think there's any standard for detergent bottles, so you'd have to make a different version for each type of bottle. At least in my country, milk jugs caps are fairly universal.

  • Is Systemd that bad afterall?
  • As someone who has been using Linux since the 90s and gone through many different unit systems, I like systemd way more than any of the past ones. It makes adding services dead simple, and is much smarter about handling dependencies and optimizing startup sequences.

    The main complaints I've seen about it seem to be people that don't understand that systemd init is a separate thing from all the other systemd stuff. If you don't like all the other systemd things, you don't need to install them at all.

  • [Discussion] I have heard that 3D printing is good for rapid prototyping, but what about localized manufacturing? What are some advantages/disadvantages of FDM vs injection molded parts?
  • When it comes to mass manufacturing, inject molding is the undisputed king. 3D print times are measured in hours per part, injection molding is measured in seconds or even milliseconds per part. Injection molded parts also have a smoother surface finish and are generally stronger than 3D prints.

    Setting up an injection molding run is expensive and time consuming. You have to design molds (requires specialized design skills) and have them machined (costly in time and materials). Setting up a 3D print just requires slicing a model and sending to the printer, which can be as little as a few minutes.

    3D printing can also create geometries that are impossible in injection molded parts. With injection molding, there are quite a few specific design requirements to allow the plastic to flow into the mold, cool, and be ejected. With 3D printing, there fewer restrictions on the design.

    So, if you want a huge number of something it's definitely worth it to spend the up front time and money to do injection molding. If you are doing smaller quantities, need to get started fast, or require geometries that are impossible with injection molds, then 3D printing may be a better option.

  • Sort by active broken on this instance?

    Is it just me, or is sort by active worse on sh.itjust.works than on other instances? On sh.itjust.works, it gives posts (both local and federated) that are weeks old. If I do the same on lemmy.world, it gives much more relevant posts that are a few hours to around a day old. Maybe there are some server settings that could be tweaked?

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    The Shape of Interfaces to Come
  • Currently, these systems have no way to separate trusted and untrusted input. This leaves them vulnerable to prompt injection attacks in basically any scenario involving unvalidated user input. It's not clear yet how that can be solved. Until it has been solved, it seriously limits how developers can use LLMs without opening the application up to exploitation.

  • Fret buzz on first and second frets
  • A simple way to check is to use the strings as a straight edge. Fret a string at fret 1 and fret 15 simultaneously. That removes the bridge and nut from the equation, and gives you a perfect straight edge. Then check for a small gap between the string and fret 7. The size of that gap tells you how much relief the neck has. You can change it by adjusting the truss rod. Use very small adjustments (like 1/8 turn) and retune the strings before checking the relief again.

    If you need to replace the truss rod nut, there are various techniques to remove the stripped one. Start by removing all string tension (this makes it easier to loosen). For a tool, you just need to find something that grabs enough to get it to turn. A slightly larger allen wrench, a blade screwdriver, a screw extractor, etc. Another option would be to find a bit of metal bar that fits in the socket and super glue it on. Then you can grab the bar with vice grip pliers and turn it.

  • Purchasing a guitar based on its frequency response
  • If you are comparing two frequency response graphs, how do you decide which is "better"? It's totally subjective and depends on what sound you prefer. And there's much more to choosing a guitar than that. For example, the action and quality of the fretboard is a major consideration.

  • InitialsDiceBearhttps://github.com/dicebear/dicebearhttps://creativecommons.org/publicdomain/zero/1.0/„Initials” (https://github.com/dicebear/dicebear) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)DA
    dack @sh.itjust.works
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