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420chan is Getting Overhauled - Changelog/Bug Report/Request Thread (Updated April 10)

/a/ - Anime & Manga Discussion Now Available
Helmet Crushing Ignore Report View Thread Reply
Frederick Clenkinnat - Mon, 11 Nov 2013 19:14:43 EST ID:oMr173xc No.5993
File: 1384215283152.jpg -(15357B / 15.00KB, 215x300) Thumbnail displayed, click image for full size. 15357
What's up /Tesla/, I asked this question over in /math/ and they sent me over here.

So I play a role playing game called Warhammer 40k, in this game I play a character who has a Magneto like power in that he can exert force on metal objects.

I'm trying to determine whether or not the force I exert will be enough to crush a human skull with the helmet they are wearing. The power that I'am using allows me to lift 2kg of metal for each point of my willpower(41), I assume this gives me two times the force of gravity, which would give me a total force of about 803N or ~180ft/lbs.

I'm not sure where to go from here, for the shape of the helmet I'm not sure if I can assume its a hollow sphere or if I have to find more exacting measurements to get n accurate answer. As for acceleration I'm just going to say its going as fast as a baseball so ~250m/s/s

What else do I need to know, and what if anything is wrong with my assumptions to determine if I can Magneto crush some poor Imperium soldiers head?
6 posts omitted. Click View Thread to read.
Jack Seffingsotch - Sat, 28 Dec 2013 18:42:34 EST ID:+8AyT+E2 No.6051 Ignore Report Reply
Too many variables, OP.
Augustus Blackwell - Tue, 20 Jan 2015 02:43:04 EST ID:vaz+up9C No.6623 Ignore Report Reply
They were space marines that had genetically modified bodies from the original geneseed making them superhuman and superhumanly tough bones
They could carry a 2 tons on their body Im sure their skull could take it

plus in books they have these rodlike projections/piercings that they put in your head to help withstand that force, or help from psykers or control that psyker shit
Sophie Wocklestock - Fri, 23 Jan 2015 19:56:16 EST ID:DGhbsE6f No.6626 Ignore Report Reply
82kg of pressure isnt much
It wont crush a helmet or a adult head

Cuban DIY Ignore Report View Thread Reply
Edwin Duckfuck - Sat, 10 Jan 2015 05:12:22 EST ID:Mhev0LT0 No.6612
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Will you ever be as inventive as a Cuban with a problem and a pile of garbage?
Graham Murdshit - Mon, 19 Jan 2015 21:48:57 EST ID:VrPIhCGo No.6622 Ignore Report Reply
Possibly not but the ideas derived from the culture are good to keep in mind :)

Which degree should i get? Ignore Report View Thread Reply
wordmachine - Tue, 06 Jan 2015 02:09:09 EST ID:LNylbZ3V No.6605
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Hello fellas, I graduated High School about 8 months ago and I've kind of drifted from low level job to low level job for a bit but now I think I'm ready to go to college. I'm fairly certain I want an engineering or computer science degree of some sort but I'm not sure which to get. Ideally I would want to become a software engineer and work somewhere in Austin possibly at a start up or game studio. Any advice on what path I should be taking?

sorry if this is the wrong board.
M - Tue, 06 Jan 2015 02:55:55 EST ID:06ISvFUq No.6606 Ignore Report Reply
If you want to become a software engineer this is probaly the wrong thread yes. Maybe you should try /tech/ or /prog/
Good Luck!
M - Tue, 06 Jan 2015 02:56:41 EST ID:06ISvFUq No.6607 Ignore Report Reply
Board, not thread
Frederick Pittingsit - Mon, 12 Jan 2015 20:10:03 EST ID:LHXB/Tyz No.6618 Ignore Report Reply
A lot of universities now offer a major called Exploratory Engineering for those who are not quite sure what discipline they are interested in. You'll mostly be taking pre-reqs early on anyways. Good luck and god speed.

Average & Effective Value Ignore Report View Thread Reply
Electro M. Echanics - Mon, 12 Jan 2015 07:39:56 EST ID:Dkbr06ET No.6615
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Someone here who could help me out find the average and effective value (True RMS) of this function?
I would be Very Thankful!
Electro M. Echanics - Mon, 12 Jan 2015 07:42:28 EST ID:Dkbr06ET No.6616 Ignore Report Reply
This might help: http://meettechniek.info/compendium/average-effective.html
Fanny Crimmerwater - Mon, 12 Jan 2015 11:36:28 EST ID:06ISvFUq No.6617 Ignore Report Reply
Dit is geen huiswerk website, probeer google of je studieboek. Mocht je geen student zijn, begin dan nooit van je leven aan meettechniek tenzij je geil word van fourrier vergelijkingen enzo

Help me make a synth / sequencer / drum machine: Ignore Report View Thread Reply
Pez - Mon, 29 Dec 2014 13:22:00 EST ID:k7ObdMFa No.6601
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I'm starting my dissertation - I want to build some kind of electronic music device. Either a synth/sequencer or a drum machine. I've made a MIDI controlled drum sequencer in PureData before, but I'm now looking into making my own controller as well as programming the software which will generate the audio. I'm pretty sure I've settled on using an Arduino Mega as it's got plenty of ins/outs so that's good for functionality (unless anyone could recommend anything better?), and I was thinking of generating and processing the audio in ChucK. What do you guys think of this idea? Any advice would be appreciated.

Also, can anyone recommend any good sources (books, websites, youtube channels) for both analogue and digital audio electronics, or any other relevant sources for this topic? Similar projects etc.

Cheers in advance.
Pez - Mon, 29 Dec 2014 13:31:55 EST ID:k7ObdMFa No.6602 Ignore Report Reply
...Also, what do you think about generating the audio in Chuck, then partially digitally processing the audio (again in Chuck) and then outputting that to some analogue components (filters etc), just to maybe get some of that analogue sound and score some bonus points ;)
Fucking Wupperforth - Sun, 11 Jan 2015 01:04:38 EST ID:rklLDMts No.6614 Ignore Report Reply
Not a recommendation or anything, but I think a waveform-biased synthesizer would be impressive. Something where you would physical tune the core frequency, having a bunch of volume adjusters for harmonics, have some sort of sculpting tools to alter the waveform, etc. If you had a screen panel on the side you could explicitly give an image of the wave-form, and have buttons to switch to the different harmonics (perhaps with their own waveforming) and super-impose the final sample. In software, you could have something where even if you tried to do some effect that was calculated over multiple waves, it could demonstrate how that no matter what, a fourier transform works.

Outward opening door lock Ignore Report View Thread Reply
Samuel Gozzledeg - Fri, 04 Jul 2014 03:48:01 EST ID:wwXtgtI1 No.6387
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So I just moved into a new apartment and the backdoor is a outward opening door facing the street, it has 3 dead bolts but it is obvious someone has crow barred it open before not sure if it was police/fire dept or someone broke in, anyway I want to get some sturdy locks on the thing but I am having trouble finding any for outward opening doors

I tried something like this http://www.amazon.com/Mintcraft-Ss-b04-db-Barrel-Stainless-Steel/dp/B001GLZQFG/ref=sr_1_2?ie=UTF8&qid=1404456927&sr=8-2&keywords=bolt+lock

but it won't fit on the door properly since the interior has a 4-5 inch molding I could drill into it but it would still be almost at the edge if connected to the door which would still be pretty easy to prey open since there would be less then a quarter inch of wood holding onto the bolt.

I was thinking the old fashioned chain door lock but with an outward opening door it seems like that would be easy to just cut.

tl;dr i need a outward opening door lock
Samuel Grandhall - Fri, 18 Jul 2014 18:51:40 EST ID:ctw8nGDk No.6404 Ignore Report Reply
Picture of the situation?
Ernest Hazzleford - Tue, 06 Jan 2015 22:50:46 EST ID:VYKZkXpH No.6608 Ignore Report Reply

Get a doorjammer. Way better than a deadbolt.
Rebecca Hollerville - Fri, 09 Jan 2015 00:23:35 EST ID:a5xmRWEe No.6609 Ignore Report Reply
put the hinges on the other side

i see no problems with this Ignore Report View Thread Reply
Basil Crummleman - Fri, 05 Dec 2014 09:57:11 EST ID:xjkvZpNQ No.6585
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hey guys i got an idea. i plan on rigging up my roll around tool cart at work with car batteries to power my corded tools and such without having to have an outlet nearby. im pretty sure all i need is a power inverter to turn the dc batteries into ac power and a battery charger to charge my batteries when not in use (i.e. when im not there i leave my tool cart at work obviously) does anyone see any issues with this?
1 posts omitted. Click View Thread to read.
Lillian Pickworth - Mon, 08 Dec 2014 19:51:13 EST ID:5z+lhQRM No.6587 Ignore Report Reply
Use deep cycle marine batteries and a powerful enough inverter.
Whitey Messlechut - Mon, 08 Dec 2014 21:41:28 EST ID:01krkNKo No.6588 Ignore Report Reply
Make sure it's rated for heavy inductive loads. Power tools pull a lot of current and it's pretty much all inductive load, which would fry a lot of the cheaper stuff that's out there. It must be pure sine wave, none of this MSW crap. Modified sine wave is noisy as fuck and will damage your motors, battery chargers, and lots of other things.
Hannah Boshville - Sat, 27 Dec 2014 18:37:05 EST ID:a5xmRWEe No.6600 Ignore Report Reply
your tools might not like an inverter
can't you switch to battery or air powered?

mcguyver thread Ignore Report View Thread Reply
Henry Trotham - Tue, 09 Sep 2014 14:44:42 EST ID:uTTzr48/ No.6476
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I have the following tell me what you would build
duck tape
empty water bottles
empty beer cans
empty wine bottles
3 broken office chairs
6 feet of PVC pipe
a broken printer
3 posts omitted. Click View Thread to read.
Isabella Fiblingbanks - Thu, 06 Nov 2014 20:00:01 EST ID:DKM7qcdl No.6567 Ignore Report Reply
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Alice Gellysot - Fri, 14 Nov 2014 13:01:46 EST ID:ynSy5DbE No.6569 Ignore Report Reply
Ha. Turn the PVC into a manual watering hydro system using the waterbottles as ghetto net pots. Use the office chair wheels to add wheels to it so its movable for whatever reason. Take the beer cans and return them for the deposit. Put the paper/cardboard/books into a firepit. Start the fire THEN drink the vodka wearing nothing but socks and underwear and dance around said fire. Reenact the scene from office space by smashing the printer to some Ghetto boys. Buy a box of wine and fill up the empty wine bottles with the box and feel more fancy when you drink. Save the duck tape because its the most useful thing you listed.
Komarov - Wed, 10 Dec 2014 02:22:10 EST ID:Bi0SolbP No.6590 Ignore Report Reply
I fucking lol'd

steel cables don't like to be folded Ignore Report View Thread Reply
Hedda Nickleville - Sat, 29 Nov 2014 11:43:22 EST ID:E7UJnAxL No.6580
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I'm making 8 bucket lights, similar to the pic. The buckets will be hanging from 2mm uncoated steel cable. My problem is with connecting the cable to the bucket. Currently, I'm drilling holes into the bucket, putting the cable through, then I fold the ends over using a combination of a pipe wrench, hammer and fingers, and put a lump of solder on it. It works but my fingers are bleeding after just 2 buckets. I could've crimped ferrules onto the ends but that shit's expensive. This is where you guys come in. Got any good ideas?
1 posts omitted. Click View Thread to read.
Charles Tootson - Sat, 29 Nov 2014 16:40:41 EST ID:01krkNKo No.6582 Ignore Report Reply
These terminal strips are pretty cheap. Buy 1 or 2 and cut them into individual pieces. Thread the steel wire in and tighten the screw. Done.
Charles Tootson - Sat, 29 Nov 2014 16:41:12 EST ID:01krkNKo No.6583 Ignore Report Reply
whoops, meant to reply to op
Matilda Naffingsadging - Mon, 29 Dec 2014 23:10:40 EST ID:2/KQDBgb No.6603 Ignore Report Reply
Glue a bead onto the cable.

"hoverboard" for 10 000 $ Ignore Report View Thread Reply
Tit Picking - Fri, 28 Nov 2014 05:10:46 EST ID:fyG0onAI No.6579
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I think you all have seen this one video with the hoverboard.
The one with Tony Hawk and blue ligths.

AM I the only one who thinks these guys are pretty delusional?
And I am not even talking about their stupid PR-babbling
(""great way of capturing peoples interests"
"this can make a serious difference in solving difference problems"


but the specifications of this thing!

  • it can only drive on copper and aluminium-laced areas.
  • it weights 40 pounds
  • lasts only for 1,3 minutes (!)
Comment too long. Click here to view the full text.
Fanny Niggerhood - Tue, 02 Dec 2014 19:04:35 EST ID:ynSy5DbE No.6584 Ignore Report Reply
Volcano surfing.
That is all

Help me out bros Ignore Report View Thread Reply
Cornelius Pockson - Mon, 24 Nov 2014 16:47:55 EST ID:PAbwN0uU No.6576
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Heya, dunno if im in the right board, but i thought you guys might know whats going on.
So I got a 120w Led panel with red led dominance, and i added a 40w CFL to boost up the grow. And the CFL's light and the bulb turned green when I turned it on. Seems weird since the light produced by the led is a bright pinkish color.
I was just wondering if leds overpower the spectrum somehow and the CFL is useless.. So do I just take the CFL outta there or leave it?
Molly Nickleville - Tue, 25 Nov 2014 09:48:17 EST ID:06ISvFUq No.6577 Ignore Report Reply
I`m not an expert on that shit but I think the pink colour of the leds overpower the CFL, making it look green. I`m quite sure that when you switch the leds off the CFL will look white again. I don`t think a 40W CFL will add much to 120W led but its better than without it I guess.
Nicholas Chundercocke - Wed, 26 Nov 2014 16:20:46 EST ID:OYFPhNGh No.6578 Ignore Report Reply
Answer's easy: optical illusion, human eye isn't really good at determining "true" color of light, think camera automatic white balance, our brain is just so good we normally don't realize. In practice we can tell when we see both light sources at the same time (assuming no mixing)

Career choice idea Ignore Report View Thread Reply
Alice Gellysot - Fri, 14 Nov 2014 12:47:59 EST ID:ynSy5DbE No.6568
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So I'm working on getting my certification from a community college for HVAC/R. Then afterwards getting a certification in electrical engineering from the same CC. My plan is to use my contacts in the growing medical marijuana industry to get contrats for jobs setting up energy efficient/safely designed grow rooms.

My questions are is a 1 year certification in both going to be enough to have the credentials needed? Specifically if it becomes legal in my state, will I need more on paper education to be hired by the big commercial operations or will they want to see more on paper?

Do yall think I should just focus on getting my associates in HVAC or get two one year certifications?

I plan on starting my own HVAC business specializing in legal op setups.
Wesley Cliddlemene - Fri, 14 Nov 2014 13:28:09 EST ID:VBJecc+I No.6570 Ignore Report Reply
Sounds like some bogus cert
Certified electrician is 3 years education + about 1 year apprentice in my part
the world.
Clara Wiggleforth - Wed, 19 Nov 2014 21:36:00 EST ID:7wKbt66O No.6575 Ignore Report Reply
I'd go full HVAC for now you could do EET later if you want/need to. One year is probably not enough for HVAC. You probably already know this, but apprenticeship is really important so I hope you have someone in mind who will take you under t

Desulfator operations Ignore Report View Thread Reply
Hannah Chuddlefit - Mon, 17 Nov 2014 22:02:24 EST ID:7AgRxdIR No.6572
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I got a battery restorer and it seems to be working but the manual dont say if
i should cycle the battery with the desulfator or keep it at constant charging with the desulfator connected.
Edward Drummleman - Tue, 18 Nov 2014 11:51:56 EST ID:06ISvFUq No.6573 Ignore Report Reply
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Did you feel like sharing this with us or is it a question?
Nell Songershaw - Tue, 18 Nov 2014 12:31:54 EST ID:CTVNwfzg No.6574 Ignore Report Reply
>if i should cycle the battery with the desulfator or keep it at constant charging

Electrical Ignore Report View Thread Reply
Eliza Trotfield - Fri, 24 Oct 2014 01:59:12 EST ID:V3vXWr1R No.6539
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I want to switch from electrical engineering to computer sci in my 5th year

; still two semesters till I graduate, and falling grades.

No more "hang in there" and just finish; I still have 2 semesters left, and for me that's two semesters too long. Literally just working on a bunch of outdated software, and learning intangible circuit equations. I have been an intern already at a startup that makes aerial filming drones and I didn't like the electrical bit at all. I was more interested in just building them up than anything that had to do with electrician engineering.


DO PEOPLE ENJOy comp sci at school and work?
Polly Breffingstotch - Sat, 25 Oct 2014 17:50:41 EST ID:CU2h2CkN No.6544 Ignore Report Reply
>computer scientists
No. Computer Science is like a Math degree, people get it for fun, but it is SHIT SHIT SHIT for work. Computer scientists usually end up getting certifications or find some training in some database or network language, and go work on managing some network for an organization.

There's probably something else like Computer Engineering or something you could get into which would still overlap at least somewhat with the electronics.

College work also tends to be esoteric compared to what you end up doing in the real world. They mostly use degrees so they can claim some sense of responsibility. An Electrical Engineer could go into wiring up buildings (related to civil but they focus far more on structure itself), designing systems for cars or other vehicles, managing things on the component level, and not the intrahardware or programming designs.

Something more microcomputer+electronics would ABSOLUTELY be more fruitful, as "the internet of things" meme will catch on, and you'll get to be right in the middle of the boom that will come from digitizing everything.
Hannah Nunnershit - Thu, 06 Nov 2014 13:53:02 EST ID:pW0l2lUu No.6566 Ignore Report Reply
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Switch to something like "physical technology". You learn how to design, and put together all these ideas in your head with a focus on making a complete product.
  • you already know a good part physics so its gonna be "easy"
  • one of the most future proof and versatile well paid degrees you can get

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