𞋴𝛂𝛋𝛆

  • 2 Posts
  • 13 Comments
Joined 2 years ago
Cake day: June 9th, 2023
  • 𞋴𝛂𝛋𝛆@lemmy.worldtoLemmy Shitpost@lemmy.world•I love talking about our lord and saviour!!! English
    11·
    2 days ago

    Title is a Mormon line.

    “With all the news about war and people suffering would you mind if I share a quick scripture about hope and better things to come”…

    That is the classic, I didn’t read the publication more than skimming, and am using a cliche presentation at your door – Jehovah’s Witness thing… I was formidable then, but so much so that none dare talk to me about what appears as indifference to them now. Jehovah’s Witnesses are classic dogma tribalism with cult like behavior sans the glorious cult leader trope.

    Arguing is absolutely pointless. Dogma is blind to all information sources from outside of the tribal authority. The only ways to change a person are either to infiltrate and gain the trust of the tribe, or stimulate general curiosity within the individual. Self growth will eventually lead to naturally questioning dogma.

  • 𞋴𝛂𝛋𝛆@lemmy.worldMto3DPrinting@lemmy.world•Has anyone sold or otherwise handed off their 3d printing business?English
    16·
    4 days ago

    In my experience selling it as a whole never happens outright. Buying someone out goes the other way around. I’ve owned my own business twice.

    You will honestly be better off holding your accounts if you ever change your mind or direction. You will get stuck with junk or make selling off stuff your career for a time. If you cannot keep your tools, make some impossible to pass up deal in bulk lots divided so that there is a good distribution of value.

    If you placed everything on eBay piecemeal, you will never sell your last item before you die. That is the case on any single platform. I was the buyer for a chain of bike shops for several years. I have sold over $136k on eBay, and I used swap meets to offload overburden too. If anyone consigns for you, if their business model is viable, they will take at least 40% out of the gross margin.

    All of eBay’s fees, shipping, taxes, all combined with an account in perfect standing came out to 39-42% of the total sale price. So with consignment, you will actually get around 20% of the total sale price or a little less. It is not at all sustainable and why no one runs successful businesses doing eBay consignments. eBay should be less than half their present fees, especially considering the poor quality of service.

    Think of offloading stuff from the perspective of the interested individual, not like a business. Part out and sell your excess tooling while still running your business with what you have.

    Personally, I don’t paint cars any more and if I could physically do the work, I still wouldn’t want to. However, many of my tools and stuff are still kicking around and something I do not regret keeping. Quite the opposite, I really wish I had kept what remained of my mixing system, and all of my welding and polishing gear.

  • 𞋴𝛂𝛋𝛆@lemmy.worldtomemes@lemmy.world•Suspicious chicken piecesEnglish
    61·
    5 days ago

    We lack broad social awareness of our relationship as digital neighbors. If anyone feels a narcissistic whim to rage rant, we should have a system like captcha on 4chan, only it forces the person to make a post in order to add the comment based on sentiment analysis. Everyone should be subjected to experiencing the effort required to make a post and specifically the toll of negativity and rage comments. The narcissistic negativity leads to the situation proven by the Prisoner’s Dilemma whereby everyone is brought down and suffers stagnation, regression, or collapse. ALL negative feedback systems are incapable of producing positive outcomes. So negativity directed at strangers on the internet is just shitting on everyone and especially the targeted victim of the abuse. It reflects a person without any real independent morality or ethics, when anonymity allows them to remove the masked cosplay of real world social pressures, and reveal the true ugliness of the raw person that resides within.

  • 𞋴𝛂𝛋𝛆@lemmy.worldMto3DPrinting@lemmy.world•What are your go-to sites to find free 3D files to print?English
    0·
    3 months ago
    Their website has been janky. They have done stuff that is likely related to poor configurations of the server but appears to be exploitive. Their site hasn't had very good features for search either. Their search results are generally garbage in an authoritarian like attempt to salt your query with unrelated irrelevant garbage to milk ads. When they are unable to serve ads, they have tried to block access in the past. They seem under funded and likely have a mess of unmaintainable spaghetti code because when they make changes other stuff seems to break often. Downloading files from such a place is likely to be a major security risk.

    Additionally, all of these file sharing websites are kinda a beginner’s thing. They are only really useful for trinket type sculpted objects. When it comes to functional prints, there is a lot of subtle details required for proper design. You will quickly learn that fasteners, and print tolerances required to replace metal fasteners is very print, material, and printer specific.

    I know my exact tolerances in every orientation on my Prusa. When I design, these elements are built into that design. I do not care about calibration. Anyone that obsesses with calibration is doing so in order to transfer designs between machines. If you make your own designs you just need to dial in the tolerance locally. If you really need a 9.95mm part dimension with a 10mm slot in some object, it is extremely easy to do in CAD. Just print a unit test of a slice of the object in question in the same orientation and manually measure all relevant dimensions and tolerances. Let’s say you measure 9.98mm when you dialed it to 9.95mm. Which side needs to be adjusted might be a factor too. All you need to do is go into the CAD and change the dimensions to 9.92mm with the change oriented correctly.

    By design these are ultimately precision machines without accuracy. The 0,0 home location is always different, but all motion is relative to this location. Calibration is trying to create transferable accuracy in a precision system. The deeper you get into this, the more it becomes an issue. Tesselated object files are also an extremely poor way of transferring designs because it bakes in the precision versus accuracy bias.

    If you are unaware, the issue with files needing tessellation is because of π being infinite and all computers truncating infinite floating point values.

    A slightly better solution for small file sharing is to post STEP files. These are the real dimensions with π as generated by the CAD hierarchical tree, but without the full tree. The STEP file can be imported in CAD and further refined through new operations and importing edges from the STEP file. However, if you go down this path, you will likely find that only beginners and extreme amateurs seem to share their designs even at this level of sharing STEP files or even the large CAD files too.

    One of the most critical advanced CAD skills is knowing where to place an object’s origin and how to dimension everything relative to critical dimensions. This gets into the topological naming issue of how CAD works under the surface. Basically there are a ton of ways to do CAD wrong. There are many CAD operations that exist for very specific niche case reasons, but are never supposed to be used within the main hierarchical tree. If this is done wrong, it will create multiple stacked references to truncated π and this will break the CAD part every time, especially when making any further modification. I often have this happen at a couple of stages within my own very complicated designs. This is very typical in a CAD design workflow. The solution is to stop and rebuild the entire part from scratch while building the proper order of operations or a better origin for the part. I usually rebuild a part at least once or twice before printing complex stuff and assemblies.

    In the past I tried printing stuff from places like thingiverse, but it was fiddly and nothing worked very well. I started importing them into FreeCAD and just rebuilding them with the part as a reference, but even this sucked. My only use for these websites now is for ideas I might integrate into my own designs. I can make anything in CAD properly and faster than I can print the whole thing twice. That is the full learning curve of 3d printer file sharing. It is also why selling files is not really a major business thing that takes off. That would only be possible with accurate machines. Precision is cheap, accuracy is not.

  • 𞋴𝛂𝛋𝛆@lemmy.worldtoPrivacy@lemmy.ml•Raspberry Pi Pico as a Security Key. Should i use it?English
    1·
    9 months ago

    You generally want to use a trusted protection module (TPM) chip like what is on most current computers and Pixel phones. The thing to understand about the TPM chips is that they have a set of unique internal keys that cannot be accessed at all. These keys are used to hash against and create other keys. The inaccessibility of this unique keyset is the critical factor. If you store keys in any regular memory, you are taking a chance.

    Maybe check out Joe Grand’s YT stuff. He has posted about hacking legit keys to recover large crypto amounts. Joe is behind the JTAGulator, if you have ever seen that one, and was a famous child hacker going by “Kingpin.”

    I recall reading somewhere about a software implementation of TPM for secure boot, but I didn’t look into it very deeply and do not recall where I read about it. Probably on Gentoo, Arch, or maybe in the book Beyond Bios (terrible)

    Andrew Huang used to have stuff up on YT that would be relevant to real security of such a device, but you usually need to know where he wrote articles to find links because most of his stuff isn’t publicly listed on YT. He has also removed a good bit over the years when certain exploits are unfixable like accessing the 8051 microcontroller built into most SD cards and running transparently. Andrew is the author of Hacking the Xbox which involved basically a man in the middle attack on a high speed PCIE (IIRC) connection.

    It would be a ton of work to try to reverse engineer what you have created and implemented in such a device. Unless you’re storing millions, it is probably not something anyone is going to mess with.

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