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Tech Thread Bernd 06/27/2017 (Tue) 17:57:50 [Preview] No. 8430
Is it possible to disable GPS in phones?
I mean actually disable it like disassemble the phone and disconnect it on the circuit board and not just in the options menu which will disable it for you and apps but not for those who want to know your location (like Google or such).


Bernd 06/27/2017 (Tue) 19:36:57 [Preview] No. 8441 del
Yeah, just clip the chip off. Which phone is it?


Bernd 06/27/2017 (Tue) 20:01:21 [Preview] No. 8445 del
Any. It's mainly hypothetical. One day it could be useful.


Bernd 06/28/2017 (Wed) 03:55:56 [Preview] No. 8451 del
>>8430
>his phone has GPS


Bernd 06/28/2017 (Wed) 03:57:56 [Preview] No. 8452 del
otherwise >>8441 has the right idea, solution for this should be done on hardware level (turn it non-functional) because it's probably integrated into operating system pretty deep


Bernd 06/28/2017 (Wed) 05:29:19 [Preview] No. 8456 del
>>8452
>otherwise >>8441 has the right idea, solution for this should be done on hardware level (turn it non-functional)
Actually that was my idea:
>disassemble the phone and disconnect it on the circuit board
So I don't think we are any further solving the problem.


Bernd 06/28/2017 (Wed) 11:10:47 [Preview] No. 8461 del
>he has a phone
normies pls go


Bernd 06/28/2017 (Wed) 20:15:42 [Preview] No. 8515 del
It is possible if GPS is separate on board, although it may broke without it. Better to replace with identical dummy module. You also can try to cheat and make some dummy software that would give fake coordinates, and evil google and Russian hackers would trust it.

But it is all meaningless shit, mate. You can be tracked by cellular network. It isn't very precise, but working. You also can be tracked by wifi, even if it is your wifi - some people and organizations do wifi maps in cities.

You have nowhere to run. It is the end.


Bernd 06/29/2017 (Thu) 05:13:35 [Preview] No. 8525 del
>>8515
I knew it! If you need real useful info a Russian can give you one.
What can be GPS integrated into? CPU, Bluetooth, Wifi?
Yeah I know about triangulation that's how older non-smart phones were tracked in need. Here we had some law about the period of time the providers had to keep the data and how the data can be acquired by anyone and such. However what's the thingy they track? The receiver's movement in the network? I dunno much about this.
Since when they equip phones with GPS btw?
>wifi
If it's connecting to wifis.


Bernd 06/29/2017 (Thu) 10:19:17 [Preview] No. 8528 del
>>8525
>What can be GPS integrated into? CPU, Bluetooth, Wifi?

It can be integrated in one big chip that you couldn't remove easily. Although chip often placed near, but I guess all thing will broke if you just remove one part.

>However what's the thingy they track? The receiver's movement in the network? I dunno much about this.

They can easily find network cell where your phone is located and record your movement between cells, no triangulation is needed, you phone registers by itself. It is pretty easy even to store, so they do it for years, police can ask them if they want. It has bad precision (few km, depends of network density), but it is something.

Overall, everything depends of what you want to achieve, what you want to hide etc.


Bernd 06/29/2017 (Thu) 10:51:08 [Preview] No. 8530 del
Even if you did, they'd still know where you are through triangulation
>he's 1 mile away from this tower, 200 feet from this tower and half a mile away from this one
>therefore he should be right here
This is how they were able to track people's location before GPS


Bernd 06/29/2017 (Thu) 12:21:29 [Preview] No. 8531 del
>>8515
Imagine a world where anybody can just take a look at you and know exactly where you are. Millennials have it worst.


Bernd 06/30/2017 (Fri) 09:14:40 [Preview] No. 8559 del
(57.44 KB 604x403 land-lease.jpg)
>>8531
I literally don't worry about it because I have no real social accounts or popular smartphone. Maybe in 30-40 years everyone would have ID chip under skin, but I'll be dead already.

Fuck this world.


Bernd 06/30/2017 (Fri) 21:59:01 [Preview] No. 8585 del
(125.59 KB 1024x682 rms.jpg)
>>8430
Welcome to the dystopia world. In this world, the cheaper and "dumber" your tech is, the more freedom you actually have so you don't have to worry about what problems other people have.
If your phone does not have a GPS module, then you don't have to worry about it, however you will have to worry if you want to locate yourself when you are in a unknown are that you don't recognize.
>>8452
If the hardware way is not the way to get rid of then how would you get rid of it? This is a bit similar question when it comes to Intel ME and Libreboot. I mean get a new kernel with no support for the GPS module or something like that. In a android phone, would this mean that you have to get root access and then remove some of the files that are needed to operate the GPS?
>>8515
>You also can try to cheat and make some dummy software that would give fake coordinates
I believe this would be somewhat good solution because in android developer tools, you can enable fake locations. There should also be some software for that because of the Pokemon GO nonsense where people would start to cheat by giving false coordinates to the app so they would get advantage over other players.
>But it is all meaningless shit, mate. You can be tracked by cellular network. It isn't very precise, but working. You also can be tracked by wifi, even if it is your wifi - some people and organizations do wifi maps in cities.
This is certainly true, thanks to the latest wikileaks info on windows machine and how they can give your location up when you use wlan access point. This then begs the question, how can you access the internet without compromising your location? Using a Linux machine that then router the internet further on down the machines while blocking ports that might be used malicious and stuff like that.
>You have nowhere to run. It is the end.
If only I could think of a counter argument for that. Go offline and use computers offline while only accessing internet public wlan? Or cracking neighbours access point to be anonymous?
>>8530
Stallman was right.

I really have to learn to use RS232 and Parallel port. You guys better start stockpile on thinkpads and then libreboot them or buy old enough machine with no features such as Intel ME/AMT or anything else actually.
This really is the end when you can't tell what EU is up to. I wonder when free speech becomes a joke.


Bernd 07/01/2017 (Sat) 09:43:33 [Preview] No. 8603 del
>>8585
>I wonder when free speech becomes a joke.

it isn't now? you can speak only about things that noone cares about, and mass bydlo opinion is 100% controllable.

if you say "fuck refuges" you will literally go to gulag.


Bernd 07/01/2017 (Sat) 09:47:43 [Preview] No. 8604 del
>>8585
>I mean get a new kernel with no support for the GPS module or something like that.
No, the problem exists that the radio comes with firmware than can use the arm chip to run arbitrary code and access the GPS outside of the OS, meaning it doesn't even touch the kernel. The only option here is to short circuit/bypass the chip with a bit of wiring or possibly flash the chip to make it broken.

I hate to get too technical on this, but unless this is for a specific use then it's likely a moot point. Your IMEI will be tracked to the receiving tower and the data you send and its' recipients logged.

>>8515
>You also can be tracked by wifi, even if it is your wifi - some people and organizations do wifi maps in cities
Actually this is a misconception. It's true, most wifi AP's are mapped but how would they know which AP you are using? From one end your activity would be traced back to the IP, which they would have an adress for and know you are accessing from somewhere they can track by signals. The other way is that you share the SSID with google/apple which they find on the map data however this can be disabled in android and usually isn't on custom roms.

I suppose you could get really technical about this, but if you really want to do this get a stack of prepaid burner phones and only talk to others with burners and don't use names or addresses. The information is too sporadic to efficiently mine. The other option gets too technical, which would be a secured smart phone phone with software to change the IMEI, using a VPN with shared IPs over a mobile data network to communicate via VOIP or other encrypted p2p messaging. That said they might just target you directly for using encryption, in which case the backdoor in your radios' firmware means you are fucked. The entire mobile telenet communication system is fucked.

You could do what Stallman does. Get a pager. Someone contacts you. You find a wifi area and contact them securely. What you really want is a free software wifi capable tablet the size of a small smart phone which would be much more convenient that lugging around your laptop.


Bernd 07/01/2017 (Sat) 10:08:14 [Preview] No. 8605 del
>>8603
Free speech is pretty new concept actually, it properly exists only in USA and really worked only last ~50 years. In other parts of world speech was never free.

So, enjoy this at least.

>if you say "fuck refuges" you will literally go to gulag.

Always was like this, especially in West, where people are overly collectivist and communitarian inside. Going against community is the best way to be an outsider.


Bernd 07/01/2017 (Sat) 10:15:15 [Preview] No. 8607 del
(101.67 KB 450x888 hank-dale-computers.jpg)
>>8604
There are plenty ways to became anonymous even in our times, but they all require some hard work and limit your ability to interact with common people. Like this:

>get a stack of prepaid burner phones and only talk to others with burners and don't use names or addresses

So, everything depends on what you want to hide, who are you and why you doing all this. All this require serious changes to your life (if you are commoner). I don't talk here about special needs like transferring big evil secrets through internet.

It is good to have some king of privacy in normal life though.


Bernd 07/01/2017 (Sat) 15:43:37 [Preview] No. 8609 del
>>8430
>Is it possible to disable GPS in phones?
Pretty easily actually. GPS signals come from sattellites, so they are very weak. All you have to do is jam the frequency with a low power transmitter and your phone is blind.
Don't forget GLONASS for more modern phones.


Bernd 07/01/2017 (Sat) 19:32:12 [Preview] No. 8634 del
>>8609
actually yeah people do that a lot
and considering the standards it wouldn't jam anything else either
but I'm not sure how much power would a jammer take, probably not much but still I'd like to know figures


Bernd 08/04/2017 (Fri) 14:15:52 [Preview] No. 9405 del
Hypothetically if you'd have to stream video over lan how would you do it, Bernd?


Bernd 08/04/2017 (Fri) 16:03:00 [Preview] No. 9406 del
>>9405
if windows I used to use servio to stream video files on my computer to my ps3/tv set up. There's osmc? I think it's called on linux. I never got it to work though. Servio was pretty easy though I'm not sure what it can and can't all stream to.


Bernd 08/04/2017 (Fri) 16:12:19 [Preview] No. 9407 del
>>9405
I'd use VLC, it's what its original purpose was (Video LAN Client)


Bernd 08/04/2017 (Fri) 16:36:48 [Preview] No. 9414 del
>>9406
>osmc
Yeah, it seems it has Debian packages.

>>9407
>Video LAN Client
>Client
What's the server?


Bernd 08/04/2017 (Fri) 17:01:49 [Preview] No. 9416 del
>>9414
There used to be a separate VLS (Video LAN Server) but they've been joined into a single project.


Bernd 08/04/2017 (Fri) 19:34:32 [Preview] No. 9417 del
>>9405
It depends what you want to stream, and who would watch it and how much time you are ready to invest in setup. VLC is probably easiest solution.

I, for example, would just share file with http server (just one-liner in terminal) and watch it through mpv through http, although you can't do it with webcam.


Bernd 08/08/2017 (Tue) 19:24:08 [Preview] No. 9479 del
>>9417
>I, for example, would just share file with http server (just one-liner in terminal) and watch it through mpv through http,
That's a sympathetic solution. What would be the easiest server to use?


Bernd 08/08/2017 (Tue) 19:32:14 [Preview] No. 9480 del
>>9479
I just doing something like "cd /path/to/dir && python -m http.server 9090" (where 9090 is port). It is for python 3, for 2 it would be -m SimpleHTTPServer, and other is same. Don't know about non-linuxes, I have none.

There is some list: https://gist.github.com/willurd/5720255

If you want something more serious and static, nginx is pretty simple. Maybe some hipster thing like caddy, but I never used it by myself.


Bernd 08/08/2017 (Tue) 19:59:54 [Preview] No. 9482 del
>>9480
Hm. That one liner sounds something that can be used via SSH and don't need tinkering with the server-to-be.


Bernd 08/08/2017 (Tue) 20:00:34 [Preview] No. 9483 del
>>9480
Also I'm guessing custom port number can be given, no?


Bernd 08/08/2017 (Tue) 20:15:55 [Preview] No. 9484 del
>>9482
Yes. This is really simple solution for transferring files inside network or even over internet.

These servers may have not perfect performance, but it isn't a problem for this use case.

>>9483
Yes.


Bernd 09/13/2017 (Wed) 21:02:13 [Preview] No. 10379 del
(123.17 KB 640x360 getting-window-ready.jpg)
I never ever Windows 10 but now a friend of mine asked me to check a laptop of his coworker as "it keeps restarting". Prescription from the guy said I should install a new Win 10 on it. I said I'll check it out. I thought it's faulty RAM or something.
Here's the laptop, and it just gave a notice about a changed hardware setting with a recommendation of restarting on every startup. No actual restart, click OK and it's usable. So it's driver and I figured it's the graphics as it's AMD. I updated the driver meanwhile the Windows had his Windows update.
After a restart I restarted it again, and the problem went away. I let the machine sit for a while turned on (I did my evening routine meanwhile) then I tried shutdown or restart I don't remember (I planned to check it again). But this piece of crap just loads something: blue background, circle goes around and around with a text: "Preparing Windows - Do not turn the machine off".
This goes for at least 20 minutes now. What the fuck?


Bernd 09/14/2017 (Thu) 05:15:30 [Preview] No. 10387 del
>>10379
So I let it sit for another 20 mins then of course I turned it off. Or suspended or whatever as when I turned it on it cuntinued with this shit. So I powered off for the night.
About half hour ago I flipped it on again. Continued loading. Then loaded. It wörks now as intended. Even the booting became shorter.
The mysterious ways of Windows I guess. But I realized why is it called 10. It took 10 mins for it to make me rage.


Bernd 09/14/2017 (Thu) 09:58:18 [Preview] No. 10391 del
windows, more like faildows


Bernd 09/14/2017 (Thu) 15:28:37 [Preview] No. 10392 del
>>10391
You're right.

Also the Windows update itself took like ages. Just dl-ing the stuff was 1,5 hour. Then installing another half hour. Than this "getting ready" stuff...
I don't get it. Linux has it's quirks due it's development by hobbyists working in their free time. But Microsoft engineers and programmers are paid handsomely to exclusively do their job. Then they sell their shit for a smaller treasure.


Bernd 09/14/2017 (Thu) 17:06:31 [Preview] No. 10398 del
(14.08 KB 216x289 badum.jpg)
>>10391
windows, more like bin, douse, and set on fire


Bernd 09/15/2017 (Fri) 14:06:34 [Preview] No. 10418 del
>>10392
You are literally witnessing the failure of capitalism first-hand


Bernd 09/15/2017 (Fri) 16:00:38 [Preview] No. 10426 del
>>10418
you mean, the failure of monopolies


Bernd 09/16/2017 (Sat) 09:51:34 [Preview] No. 10459 del
>>10426
>What is Apple


Bernd 10/04/2017 (Wed) 06:01:29 [Preview] No. 10874 del
Why is it so fucking hard to find a passable proxy?


Bernd 10/04/2017 (Wed) 08:37:03 [Preview] No. 10875 del
>>10874
You want free proxy? These things were dead for years.

Make them by yourself now, hosting is cheap.


Bernd 10/04/2017 (Wed) 15:45:08 [Preview] No. 10876 del
>>10875
I find working free proxies with the same effort since forever which is a damn long period.
I don't want to set up an own as I rarely need or want one so the expense no matter how trivial these days isn't justified.
On Monday I saw that pigdog posting on 8/kc and I tried to direct him here as he's not bad poster and we need everyone we can get. Also 8/kc doesn't need any posters as it's more dead, ümm, sorry, more special then ours here. And I'm sure he would be interested in a board with such great quality as ours. This is why I needed proxy as the new BO there bans everyone who mentions this place. I wrote on Monday evening but it was deleted yesterday. And in the end I managed to leave a post in the morn but now it's gone the BO probably anticipated another post and acted accordingly. Damn neets.


Bernd 10/04/2017 (Wed) 16:52:14 [Preview] No. 10878 del
>>10876
Some time ago 8/kc was again free for claim
>wrote email to admin
>advertised this place there
>next day I'm banned and board is taken


Bernd 10/04/2017 (Wed) 17:04:40 [Preview] No. 10882 del
>>10878
What a pleasant bunch.
Where can one see which boards are claimable?


Bernd 10/04/2017 (Wed) 18:11:07 [Preview] No. 10884 del
>>10882
>/int/ is still claimable
I wrote an email a month ago already, I wonder what's wrong with it?


Bernd 10/04/2017 (Wed) 18:12:08 [Preview] No. 10885 del
>>10883
Thanks.

So. They might know him and when you tried to claim the board they notified him and did the necessary steps to keep the board. I don't understand the ban tho.


Bernd 10/04/2017 (Wed) 18:14:13 [Preview] No. 10888 del
>>10884
How much traffic does it get?


Bernd 10/04/2017 (Wed) 18:23:35 [Preview] No. 10890 del
>>10888
Slightly more than this place, I'd say.


Bernd 10/04/2017 (Wed) 22:10:56 [Preview] No. 10903 del
>>10878
IIRC there's a rule specifically banning the use of Jimchan boards to advertise boards on other sites.


Bernd 10/05/2017 (Thu) 15:31:54 [Preview] No. 10910 del
>>10885
>>10903
I remember now that I asked for the board just after last KC downtime, so tbh the old-new owner could just log in into his account.
Also I know about board advertising rule, it's only in effect if you have a board solely to redirect traffic into a different place, and I just made one thread as a user and got banned by local owner.


Bernd 11/11/2017 (Sat) 17:36:33 [Preview] No. 11839 del
(1.96 MB 3264x2448 this_is_not_a_drill.jpg)
I won't open a new thread as won't be that many pictures of this.

Look at this treasure, Bernd. A screwdriver of the greatest brand. It doesn't wörk. It's mechanical parts are fine the batteries or the charger died. I have a power drill and screw bits but the trigger is too sensitive on that and I got this Tesco shit for free and I'll repair it.
Well if I succeed. I have a cunning plan.
1. Disassemble it. Screw out the screws, break the plastic where it needs breaking, cut the cords.
2. Join the two-two cords.
3. Apply soldering and duct-tape freely.
4. ???
5. PROFIT.
I'm gonna do this in the near future and I'll post updates.
Do you have any tips?


Bernd 11/13/2017 (Mon) 16:30:00 [Preview] No. 11866 del
>>11839
good luck
repearing/building stuff is good for a man's soul


Bernd 11/13/2017 (Mon) 17:16:34 [Preview] No. 11870 del
(606.10 KB 1632x1224 adapter.jpg)
>>11866
I think and hope so too.

I took apart the adapter and this little panel was inside. I calculate the positive wire is the one I marked with red +. This stuff supposedly important with AC devices.


Bernd 11/15/2017 (Wed) 03:18:32 [Preview] No. 11905 del
(149.00 KB 1155x581 pilkunnussija.jpg)
>Tech Thread

When you search for comma in Finnish, a graphic for a comma fucker comes up as the default descriptive image.


Bernd 11/15/2017 (Wed) 06:21:50 [Preview] No. 11906 del
(117.44 KB 1316x491 vesszej.png)
>>11905
If your language has an expression for it than there's a chance it'll turn up.
You can also turn on parental control or whatnot and don't get the result.


Bernd 11/15/2017 (Wed) 07:58:09 [Preview] No. 11909 del
>>11906
>than


Bernd 11/15/2017 (Wed) 08:04:08 [Preview] No. 11910 del
>>11870
>positive
>AC
i think you either mean "live" or "DC"


Bernd 11/15/2017 (Wed) 16:15:11 [Preview] No. 11914 del
>>11910
Yeah, DC, thanks. But while we are at it, do you have other tips then grammatical ones?
Liek. I've to options. Unscrew the screws on the drill to take apart the plastic casing or I can cut the end of the grip with a saw. I'm pro taking apart the normal way now as I'm not sure if I cut I'll have enough space to work there and could turn out in the end I still have to take the thing apart. But it's not sure taking it apart will be as straightforward as I think it now. Difficulties I'm not planned for could rise.


Bernd 11/15/2017 (Wed) 19:38:37 [Preview] No. 11921 del
>>11914

Bud what you got there is a cheap as fuck TESCO crapdrill. As you can see it says "12 volts" and so what this means is that it's taking 110 from your wall and converting it and storing it as 12volts in the battery (which in an asshole fashion, they seal inside the base of it). All you gotta do is like you said, cut the bottom cap off the drill, and you'll find a 12 volt battery in there. They all have two wires, + and - so then just take that battery out, and use a car battery which runs at 12 volts instead. Every 12 volt drill can run straight off a car battery. To make the connections permanent, simply solder them or get some crimp connectors. Bolt a smaller motor cycle battery to it that you can then tape together, and you have freed that baby from the wall cord forever. Well, at least until you need to charge it. But don't charge your new creation at the wall using the old cord, get a decent 12volt battery charger. Congrats on being one of the learning types, you will go far.


Bernd 11/15/2017 (Wed) 20:16:01 [Preview] No. 11924 del
(1.69 MB 3264x2448 cut_here.jpg)
>>11921
Not that it matters but 230V runs in the wires in the wall here. The adapter gives 15V to the battery which converts it down to 12. The battery itself is detachable that's how can be connected to the adapter which has (had) the same shape as the grip of the drill.
I'm gonna connect the adapter directly to the drill's motor which will take every V of that 15 like a champ. It's not a problem for me to run an extension cord where I have to drill.
I have to admit I rarely tinker with these kind of things but I also have to say I'm not hesitating doing it just don't have the time. So that's why it takes it few days or some more. At least I've something not that usual to post.
That car/bike battery solution is fairly creative.


Bernd 11/15/2017 (Wed) 20:29:22 [Preview] No. 11926 del
>>11924

I does matter and thanks for pointing out, yes, I knew you were on 220 over there but didn't want to presume. You got the right idea. Really tho, what will you drill? Hey why not crack the thing open and take out the very DC motor in there, and then chuk a sprocket and drive a chain with it? You could literally make a motorized skateboard with what you got, iv you have some chain and a welder.


Bernd 11/15/2017 (Wed) 20:42:49 [Preview] No. 11928 del
(519.07 KB 1296x2320 1902_-_Grinding_machine.jpg)
(18.50 KB 200x140 Rotating_grinder.gif)
>>11926
How about a bench grinder? I have some old stones and I want to build sometimes a foot powered one.
I might have a chain tho or can get one for nothing or next to it. But my welding skill is about the same (next to nothing) as I can't hold the trode steady because my hands are a bit shaky (just enough to make welding an irritating experience for me). I blame my younger self I hit the nerves out of my knuckles.


Bernd 11/15/2017 (Wed) 23:30:37 [Preview] No. 11930 del
(45.08 KB 640x480 707680dc632c.jpg)
(61.45 KB 1280x720 maxresdefault.jpg)
>>11928
Why do you need chain?


Bernd 11/15/2017 (Wed) 23:36:43 [Preview] No. 11931 del
The potentials for both great construction of things, and also destruction of self, boggle the mind. Well done lads.


Bernd 11/15/2017 (Wed) 23:47:15 [Preview] No. 11932 del
>>8559
Amen brother! I finally found me a person just like me!


Bernd 11/16/2017 (Thu) 00:32:39 [Preview] No. 11933 del
(135.76 KB 1920x1080 opposites attract.jpg)


Bernd 11/16/2017 (Thu) 06:09:46 [Preview] No. 11934 del
>>11930
I don't. I was a comment on his original idea: >>11926
Since then I got the great idea of combining picrel with wheels. That two shits on the sides could be used as steering devices with the help of some lines.


Bernd 11/16/2017 (Thu) 18:34:41 [Preview] No. 11939 del
(544.26 KB 1632x1224 opened.jpg)
(523.41 KB 1632x1224 wires.jpg)
The inside of this sophisticated piece of machinery. Unlike the adapter's cord the wires are color coded, the red one is the +.
I didn't cut but removed the wires with a soldering iron from their original joining points to preserve as much wire as I can.


Bernd 11/16/2017 (Thu) 18:50:47 [Preview] No. 11940 del
>>8585
>libreboot
trannies fuck off, just go for coreboot, it removes the ME and all other harmful proprietary shit most of the time and works on modern hardware, check out Raptor Engineering


Bernd 11/16/2017 (Thu) 19:05:51 [Preview] No. 11941 del
>>11940
And how does one replace the uefi with *boot?


Bernd 11/16/2017 (Thu) 19:27:02 [Preview] No. 11946 del
>>11941
lmao, can't you do a simple Google search and read the Coreboot wiki?

tianocore is an open source replacement for UEFI, just use it as your payload during the build stage if you want it, most of the boards are fine with using SeaBIOS though, but you won't have GPT support and a few other neat features


Bernd 11/16/2017 (Thu) 19:41:03 [Preview] No. 11947 del
>>11946
>can't you do a simple Google search and read the Coreboot wiki?
I could but chans are for posting stuff. If everyone just googled no conversations would exist. You seem well informed I bet you're installed many bios uefi replacers. What's your experience? How well they perform?


Bernd 11/16/2017 (Thu) 19:51:49 [Preview] No. 11948 del
(113.32 KB 902x762 terry-stallman.jpg)
>>11940

Librefoot trannies said "sorry" already: https://libreboot.org/news/unity.html

It's just about "struggling with gender dysphoria and substance abuse", stop hating, evil white man.


Bernd 11/16/2017 (Thu) 19:53:43 [Preview] No. 11949 del
>>11939
You're hip-deep now man. Just look at that gleaming and useful DC motor which those Tesco a holes assume we are too dumb to use or modify. Why do they have such contempt for those of us who take apart and then make better, all the things we own? Hmm, I am seeing many uses for this motor. I would hook it to a car battery and chuck the thing onto a bike wheel, and then use it to turn a automotive alternator which generates 12 volts+ which then powers the motor, PRESTO! unlimited energy machine so long as you only use small loads. Throw some bricks in the wheel for a heavier turning wheel and you got energy storage in the wheel which will push a little more juice. Not sure if all your cars there produce 12 volts DC, of course if they produce 15 volts that's fine, DC normally is such that a device will only draw as much current as it needs, so my alternator on my truck runs at 14 volts tho the components only need 12.


Bernd 11/16/2017 (Thu) 20:34:50 [Preview] No. 11950 del
>>11947
Faster performance, greater security. Comes at a cost, though. You've probably seen your BIOS/UEFI menu, no? Lots of options, including fan speeds. Maybe CPU overclocking, RAM voltage. Coreboot has none of that. You're left with a blank menu with an option to choose the media you want to boot from. This is mostly how the speed is gained. Granted, the average user doesn't need those, but if you wanna overclock your machine, bad luck, you can only do software level shit.

I found this disappointing personally because the best boards supported by coreboot sans the Raptor Engineering $6k stuff are Ivy Bridge. You can achieve amazing performance, granted you perform CPU delidding and overclock a K series. Goes out of the window on coreboot. You still can build a great server, a desktop for work, but no high spec gaming (although funnily, if your board didn't support a modern GPU, it will in coreboot).

If you wanna ask why is that, well, adding overclocking is unsafe. The people who write the software are not the manufacturers, and thus they do not possess the in depth knowledge of every single chip and capacitor on the board required to safely overclock.

What might put you off is that a lot of boards have write protected flash chips, requiring an external flasher. It took me a while to figure out, but I bought a cheap CHA341 programmer with a SPI chip adapter (search for SOP8 to DIP8 200 milimeter), fucked around with the positions and finally got to flash the fucker. Once you do it, all subsequent times will be easy. Also once you external flash, you can update coreboot or flash something else from the software level using flashrom.

Go for it. It's an adventure.


Bernd 11/17/2017 (Fri) 06:30:47 [Preview] No. 11956 del
(438.94 KB 1196x1600 ringworld.jpg)
(185.25 KB 1000x563 ring_world.jpg)
How a ringworld wörks?
One side is constantly scorched by the Sun, the other is in permanent dark. The ozone filters much UV all right but an Earthlike planet has temperature fluctuation and nights give time for cooling down. Constant sunlight would cause overheating. And in all the ringworld pics the constructs seem to face the Sun equatorial style.
Or the inner side has solar panel coating and people would live in artificial heating and lighting conditions? With artificial skydome?
I really should read the novel. Right now I'm stuck in the mire of the Black Company series.


Bernd 11/17/2017 (Fri) 06:55:24 [Preview] No. 11959 del
>>11956

I would think first you'd need to wrangle some asteroid to use for mining material for the first panel or whatever that people live on. The reverse side, being as cold as fuck would be very useful not in the least for cyclic power between the warm and cold sides, I expect the cold side could be made very useful, a freezer under every home so to speak. Have not read the book tho. From where we are as a world, it's like ants discussing how to build skyscrapers. Anyway even if we built it, some asshole muslim would try to blow it up.


Bernd 11/17/2017 (Fri) 15:04:46 [Preview] No.11961 del
>>11956
Best option: just place it further away than you would have a regular planet. For example ring at around Mars distance. Actually I could calculate how much further away you'd need to place a disc, it all comes down to radiative balance.


Bernd 11/17/2017 (Fri) 16:41:28 [Preview] No.11965 del
>>11959
Oh yeah. The cold side could be used as heat sink. Also solar panels could generate electricity 24/7 and solar furnaces and cookers everywhere.
Still, constant daylight can fuck with the peep's mind so nights still would be nice tho. Maybe certain sections of the structure could rotate to have day-night cycle.

>From where we are as a world, it's like ants discussing how to build skyscrapers.
Ants are very good at building giant structures (compared to their size).

>>11961
>I could calculate
After that calculation would you consider making a sketch on the weather? How would a weather look like on a world like in pictures? Or how it should be regulated if it would be possible?


Bernd 11/17/2017 (Fri) 16:46:40 [Preview] No.11966 del
>>11965
>how would weather look like
Hm, since there's zero differential rotation and temperature from equator to poles, there's no Coriolis effect, so there can be no cyclones, no jet stream, in other words, very boring. It would all look like convective storms right next to equator.


Bernd 11/17/2017 (Fri) 16:49:59 [Preview] No.11968 del
As for day/night cycle, the usual idea is to build big-ass shades, as in pic 3 in >>11956


Bernd 11/17/2017 (Fri) 16:56:00 [Preview] No.11971 del
>>11965
> Maybe certain sections of the structure could rotate to have day-night cycle.
Unless we are talking about some artificial gravity, the ring would have to spin so people on the sunny side could walk normally. If you rotate a section to make a night the force created by rotation instead of keeping them on the ground would catapult them into the void.


Bernd 11/17/2017 (Fri) 16:56:40 [Preview] No.11972 del
>>11971
>the force created by rotation
I meant force created by spinning.


Bernd 11/17/2017 (Fri) 16:58:47 [Preview] No.11973 del
>>11971
No you don't need artificial gravity. If the torus is massive enough...
Oh wait there's absolutely no way you can get enough rock to make a torus around a star like that.


Bernd 11/17/2017 (Fri) 16:59:55 [Preview] No.11974 del
Still for large enough centrifugal effect you'd need some crazy spin on that ring. Another thing to calculate...


Bernd 11/17/2017 (Fri) 17:08:20 [Preview] No.11975 del
>>11973
>If the torus is massive enough...
>enough rock
And we have hollow Earth, don't we?


Bernd 11/17/2017 (Fri) 17:31:45 [Preview] No.11976 del
>>11974
Found that picture.
How crazy is 1200km/s?


Bernd 11/17/2017 (Fri) 19:37:02 [Preview] No.11979 del
OK. So let's start with calculating the radius of a ringworld for an Earth-like climate.

Energy flux from Sun is the same at all distances (there's not much medium that would block it in between), so energy flux density is correlated to the square of distance from Sun – the surface of a sphere at a given distance. This energy received is then lost back into space by thermal radiation, which by Stefan's law is correlated to fourth power of temperature. Since the Earth is generally in thermal equilibrium, we can say that thermal radiation of Earth needs to be the same as illumination of Earth from Sun.

Now, the Earth is (at our level of precision) a sphere; it has surface area of 4πr², and entire surface radiates heat back into space (let's ignore temperature differences on the surface, and just calculate for average temperature). But it receives energy from Sun only by the area of its cross-section; which is a circle of area πr². On contrary, a ringworld would receive energy flux from Sun by its entire internal area, and also radiate it back with the same area (energy flux into the ground onto the other side is negligible, energy flux coming out of the ground is also negligible in Earth's case). This different ratio of effective surface areas for both energy fluxes is what I'll use for calculating the required size of the ringworld.

Option 1) no shades. In this case, the ringworld needs to be positioned at the distance where energy flux from Sun is 1/4 that at Earth's distance, for it to have equilibrium at the same temperature. From the square law of energy flux decrease it follows that the ring needs to be at the distance of 2AU, or radius of about 300M km.

Option 2) with shades. The ringworld now receives only half the Solar irradiation, so we need to place it at distance where energy flux would be 1/2 without the shades. Take a square root out of this for distance of 1.4AU, or about 210M km.


Bernd 11/17/2017 (Fri) 19:56:19 [Preview] No.11980 del
>>11979
Let us continue calculating how to make such a ring work so that things don't just fall off it. From here on I'll rely on the shaded option, going unshaded the structure is only more ridiculously oversized.

If we want to generate Earth-like gravity of about 9.81 m/s², there are as I said before two options. Option one is to construct a massive ring and rely on gravitational pull. That's not really feasible, just by handwaving and considering orders of magnitude one can see that the ring would have to be about Earth's thickness to have a similar gravitational pull; and to have a ring of about Earth's thickness all the way around the Sun, from Earth's diameter of about 12k km you'd need 17500 Earths. That's about 10²⁹kg, which is 50 Jupiter's masses, or 5% Sun's mass. So, option discarded.

Let's try with spin. In a spinning system centrifugal effect can be expressed as a_c = rω². Plugging in values a_c = 9.81 m/s² an r = 210M km one gets angular velocity of ω = 6.8 μs⁻¹, completing one full revolution (2π) in 10.7 days. Similarly from angular velocity and radius one can calculate radial velocity, v = rω, or 1440 km/s.


Bernd 11/17/2017 (Fri) 20:57:41 [Preview] No.11981 del
(3.22 KB 400x400 ring tension.png)
So. How do we calculate structural tension in the ring? We need to understand what generates this tension.

So, we have a centrifugal effect in the ring. There needs to be some structural integrity in the ring that holds it together, so that it doesn't fall apart. To do that we need to employ differential calculus, but to make it clearer what's going on I'll use finite sections of ring and just linearise everything (which gives the same result).

So, if you take a section of the ring of angle Δφ, and balance out the forces, we have three forces: the structural tension on both sides, and the centrifugal effect that we need to balance out. The section has mass of ΔM = Δφ * μ, where by μ I have introduced angular mass density, which has units of mass per angle (in radians, or in degrees, doesn't matter, it just needs to be in same units as Δφ). By F = M * a and plugging everything in, we can get the equation for centripetal force F_c = Δφ * μ * g₀ (standard gravitational acceleration).

On the other hand, the tension generates, from vector-summing tension force F_t on both sides, a counteracting force towards the centre. That force can be calculated by using chord function, crd(θ) = 2 sin (θ/2). I'm providing a quick sketch of how this summing is done; but the end result is F_c = crd(Δφ) * F_t.

Now we need to linearise the expressions which will get us to the differential equations. As Δφ goes to zero, we can expand it to get that crd(dφ) is simply dφ (just like sine) — provided that we use radians as units of angle. So, crd(dφ) * F_t = dφ * F_t, which is in turn equal to dφ * μ * g₀ from previous equation. We can just divide by dφ on both sides (we sent dφ to zero, but it's just almost zero, so we can still divide by it). This gives us final equation for tension force: F_t = μ * g₀. Here we will need to plug in the value for angular mass density μ, or rather since mass of whole ring is M = 2π * μ (we're using radians), we can also write this in terms of mass of the ring F_t = M * g₀.

We'd like to compare this with tensile strength. We can write mass as product of ordinary density times volume, and volume as cross-section times circumference, where circumference is of course 2πR; M = ρ * S * 2πR. Tensile strength is given as tension force times cross-section; σ = F_t/S. Dividing both sides by S thus gives the equation: σ = ρ * 2πR * g₀. To compare with real materials let's just calculate the ratio between tensile strength and density σ/ρ from given dimensions; we get value of 1.3*10¹³ m²/s², which in usual units of tensile strength and density is 1.3*10¹⁰ MPa per g/cm³. For most metals, fibres, etc.. this is in range 100-1000; for graphene it's in range of 10⁵, and for carbon nanotubes it's theoretically up to 10⁷. So, the strongest structural material known to man is still 1000 times weaker than what one would require to hold up such a structure — and it's a nanomaterial, not something one would construct a huge-ass space structure out of it. To give another perspective of the scale of tension, if one assumed density of the ring close to that of rock or metal, several g/cm³, the tension force would be comparable to the pressure at the centre of Sun.


Bernd 11/17/2017 (Fri) 21:00:23 [Preview] No.11982 del
Addendum: actually, we'd need to have slightly more spin, as we'd also need to take gravitational pull of the Sun into account. But to counteract that gravitational pull one needs much smaller velocities; Mars which orbits at similar distance has mean orbital velocity of 24 km/s, so we'd need to add a 2% correction.


Bernd 11/18/2017 (Sat) 07:21:10 [Preview] No.11985 del
(33.25 KB 390x390 Asperger_King.gif)
(5.45 KB 240x80 kc-tier1.jpg)
>>11979
>>11980
>>11981
>>11982
I see you took this seriously and it was on teh /kc/.
I'll read it with proper attention.


Bernd 11/18/2017 (Sat) 11:30:03 [Preview] No.11986 del
(1.92 MB 3264x2448 hole_butt.jpg)
(1.97 MB 3264x2448 joined.jpg)
(1.74 MB 3264x2448 assembled.jpg)
Update.
I made a hole on the buttom of the grip so it can accomodate that thingy on the wires which prevents breaking. I found a thinner part on the plastic where I simply cut it with a knife.
I did horrible job with the soldering. It was awful. So I decided it's high time to clean the iron. Then it went much better. I tried to correct the crap I made, it's better but still ugly. At least the tape covers it's esthetic too.
Then assembled the shit.


sage Bernd 11/18/2017 (Sat) 11:31:43 [Preview] No.11987 del
>>11986
>buttom
Well I did good with that one. Kek.


Bernd 11/18/2017 (Sat) 11:32:22 [Preview] No.11988 del
>>11987
Too many fields.


Bernd 11/18/2017 (Sat) 11:37:50 [Preview] No.11989 del
(7.30 MB 720x480 drill_test.webm)
>>11986
Then of course I tested it out. It wörks!
But it's shit. Weak as fuck. It seems that 400mAh of the adapter is nowhere to enough. With a different adapter it could work tho. For now I'll put this project smugface on ice for a while, I'll check if I have something somewhere or if I can get one. For free ofc I don't want to sink moneiz in this.

Here's a shitty webm on how shitty it is.


Bernd 11/18/2017 (Sat) 12:01:36 [Preview] No.11990 del
>>11982
Now a structure like this even if it's not as thick as the Earth would have a considerable mass with it's own gravitational pull. And a ring's center of gravity is in the middle where the Sun is. This pull should be compensated too, no?


Bernd 11/18/2017 (Sat) 13:31:25 [Preview] No.11991 del
>>11990
nod really, a 2% less gravity won't be changing much in our life
in fact I though we could decrease the gravity on the ring even more thus making it cheaper and easier to build, but I don't know what are acceptable values for comfortable human living standards


Bernd 11/18/2017 (Sat) 13:41:25 [Preview] No.11992 del
>>11989
what are the ogg related noises?


Bernd 11/18/2017 (Sat) 14:40:17 [Preview] No.11993 del
>>11992
It might be just the camera. If I move it (no matter how small the movement is) then the optics constantly makes rattling noises. It's so quiet it's only audible if I put it near my ears but of course the mic picks it up.
Or it's the interference from the bugs secret services covered the house with.
The drill doesn't make any noise when it's plugged in until I pull the trigger. Then it starts buzzing. (And it only works if I pull the trigger all the way.)


Bernd 11/18/2017 (Sat) 14:53:38 [Preview] No.11994 del
>>11991
We don't know if that pull (it's not the Sun's but the structure itself) only effects with 2%.
Also if we start building it I've an underpowered drill for the cause.


Bernd 11/18/2017 (Sat) 14:58:21 [Preview] No.11995 del
>>11994
pull of the structure will be much smaller then the sun's, because there's no way we can make it have more mass then the star


Bernd 11/18/2017 (Sat) 15:06:36 [Preview] No.11996 del
>>11995
Well, I can make a your mum joke out of this.


Bernd 11/18/2017 (Sat) 18:02:35 [Preview] No.12003 del
>>11996
go ahead


Bernd 11/18/2017 (Sat) 18:16:12 [Preview] No.12004 del
you can't really use any argument concerning centre of mass here, that only works for gravitational field at large distances
for gravitational field nearby the best bet would be solving Laplace equation


Bernd 11/18/2017 (Sat) 19:58:06 [Preview] No.12005 del
>>11995
no.1
>no way we can make it have more mass then the star
Until your mom gets on board.

no.2
Your mom is so fat she's the center of gravity in our ringworld.


Bernd 11/18/2017 (Sat) 21:01:56 [Preview] No.12006 del
(65.60 KB 450x600 1454266499001.jpg)



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