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Joined 3 years ago
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Cake day: June 15th, 2023

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  • The green circled one is a perfect solder joint. The yellow one has a bit too much solder, but its still fine. It was heated enough for the solder to flow around the connections of the work. The red one could be better. It looks like you had a good solder joint when you put that resistor on, but then later it looks like you came back with a solder covered wire to run the connection over to the contact on the right. The fact I’m not seeing deformation of the resistor solder joint when the wire was attached makes me think you might have a cold solder joint there at the resistor for the wire.

    Honestly, for this simple circuit all your solder joints are at least passable if not perfect. I doubt this board would ever be in circumstances that any of these solder joints would fail.

    A few other things that I’ve learned over decades of soldering:

    • Soldering is the act of heating the work not the solder. When the work is hot enough, the solder will melt and flow over the connection.
    • Good soldering is moving the heat into the work as efficiently as possible with the shortest time so as to not damage the board or the components. If you place a “dry” iron tip against the work a shockingly small surface area will actually be in contact with the work to transfer heat. Instead “wet” the iron it with just a tiny bit of solder. It will liquefy instantly and sit as a small liquid ball on the tip of your iron. That ball of liquid solder will squish around whatever shape you’re applying the tip to providing an excellent thermal bridge to move the heat into the work.
    • All soldering irons have a “heat battery”. Here’s a bunch of them I circled in green:

    Typically inside that section is not only the heating element but a dense piece of material. Usually ceramic but sometimes metals. They all perform the same function. When the heating element heats up, heat is drawn off the element into the dense material in the iron. When you place the tip of the iron on the work, most of the heat is draining from that dense material, and only a bit from the heating element itself.

    The consequence to this is that if you’re soldering lots of small points back-to-back, or a very large contact just once, you can drain all the usable heat out of the iron and still not bring the work up to the right temperature for solder to flow right. If solder starts acting weird and plastic like after you’ve solder a bunch of points, simply set the iron back on its rest and wait for a minute or so for the iron to fill its heat battery back up. After that you’ll see the solder behaving how you expect.


  • In the case of the OnePlus 6T, only the T-Mobile version is ‘supported,’ when the unlocked version is the same in all other markets (including the US).

    I’m seeing two models of the OnePlus 6T:

    • 6T (A6013) This one is on the list of AT&T approved devices and most importantly has LTE bands 30 and 71 which are used in North America. source
    • 6T (A6010) This one is made for the Chinese market and has the following LTE Bands: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 32, 38, 39, 40, 41, 66. Notice that North American LTE bans 30 and 71 are missing. source

    Are you aware of a different 6T model besides these two or are you saying there are 6T (A6013) that AT&T are rejecting from activating on their network?


  • both militaries are relying on conscripts and mercenaries,

    Sure, but not in equal measures. Russia’s causalities has been acknowledge by both sides to be significantly higher than Ukraine’s, and that was when Russia still had its Soviet stockpile now largely exhausted. Ukraine is getting resupplied by the west. Russia is getting resupplied by…North Korea?

    Zelensky is fully fucked the next time Ukrainians bother to have a domestic vote.

    Ukraine is much more than simply Zelensky. Euromaidan had nothing to do with Zelensky. I’m not aware of any groundswell of support of the Ukrainian people for capitulation to being conquered by Russia. I would think this would still mean a pro-Ukrainian anti-Russian president after Zelensky is out of office.

    Both of their economies have tanked, with further economic pressures coming from the conflict with Iran and the climate change threat.

    I agree, but Ukraine still has access to global markets for sales, and its new defense industries appear to be the hot item for global customers. Russia, which traditionally had a pretty good income from its defense industries has been wiped out with a multiprong situation of lack of manufacturing capacity to support its domestic weapons consumption while still providing units for export to derive income, and the poor performance of Russian systems on the battlefield make for a bad sales argument. If anything, China is poised to take over the space of defense industry that runs counter to the traditional western suppliers.

    The issue isn’t whether one runs out first. It’s how long the political leadership can drag this forward before someone pops them and brokers a settlement that ends the bleeding.

    With Russia that leadership is one man, Putin. I would imagine as soon as he’s gone the will to fight the war evaporates with him. With Ukraine, I’m not aware of any pro-Russian candidate that show any sign of a significant lead that would suggest pro-Russians take power in Ukraine.


  • But if Ukraine won’t negotiate without full return of territory (presumably even including Crimea, which is fully outside their political influence) and Russia won’t cede territory they’ve entrenched…

    There is a big distinction between the primary fuel of the armies of Russia vs Ukraine.

    • Russia is relying primarily on human meatwaves to take and hold ground.

    • Ukraine’s army primarily runs on money. They buy western advanced weapons and invest in design and manufacturing of next-generation drone warfare (that has now become an income channel for Ukrainian arms exports to places like the Middle East). A year or two ago Ukraine shocked the world by holding positions for weeks and months with purely robotic guns. Just this week Ukraine offensively took and ground with only robots. Additional can be had with just more money.

    Which one of these two do we think is going to run out first? The article we’re talking about is showing a $90B financial lifeline to Ukraine. I’m not seeing where Russia is going to get another 1,000,000 men to march into Ukrainian bombs and bullets to continue the war indefinitely.

    Additionally Russia has largely exhausted its Soviet era stockpile of weapons, and the nation’s manufacturing capacity is not near enough to replace the losses as quickly as they are occurring. Yesterday’s Russian casualty numbers bear this out. 1 tank lost. 1010 men casualties.



  • My phone at the time worked fine on 4G for over a year, but suddenly one day it no longer worked once they started enforcing this. I suspect the carrier wanted to collect a troll toll from phone manufacturers to allow them the privilege to sell a phone to their customers

    Its certainly possible that they’re trying to extract a toll from handset manufacturers, but I could also see it being a spectrum consolidation. Can I ask if your OnePlus 5T was a model specifically made for the USA market or was it imported from China or Indian markets? I’ve seen non-domestic model phones not contain all the same radios as North American phones. So while its possible there were a few specific bands overlapping that allowed it to work, those bands could have been deprovisioned from phone service or sold off to other companies wanting to buy spectrum.





  • People crave certainty.

    I think its slightly different I’d say its closer to: People crave simplicity.

    That can frequently mean certain answers, but even if the answers aren’t certain, but simple, they accept it. This is the root of most conspiracy theories. It is much simpler to accept that a global cabal is specifically trying to convince people the Earth is flat rather than accept that we live on the surface of a very large round planet, that “down” doesn’t always mean down, and that gravity exists to prevent people on the “bottom” of Earth don’t simply fall off into space.









  • Well, I’m running Asahi Linux on a Macbook which can’t boot from USB even if I wanted to.

    However, if you’re really worried about state-level threat actors, like FBI or CIA, I don’t believe there is much you could do to protect yourself anyway. They likely have entire catalogs of unpublished and undisclosed side-band attack exploits they could draw from to gain access to your machine and execute a privilege escalation to install whatever they want.