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li-fi to the next level by Esther Gezzlefadge - Fri, 19 Jun 2015 19:56:15 EST ID:JKp7jUDw No.6722 Ignore Report Reply Quick Reply
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fiber optics are already being used to transfer data but not every machine can be directly connected amirite?
so similar to wi-fi and such is it possible to utilize light in the same manner? like specific wavelengths transmitting to a device that would decode it as binary -

in a bigger scale - would it be possible to construct a massive device that could be thrown into space and transmit a binary.. like a star flickering - we're transmitting radio waves into space right?
would this not work? - also, though i don't know much about what i'm talking about
i think lasers would also be able to do the same, though it would take a precise calculation and such.. but say we sent a satellite somewhere like Saturn and fixed it with a device that would transmit the data back to a receiver with a laser transmission i'm sure it could be done...
just trying to think like aliens - i mean.. imagining that aliens are super far from each other and they have to communicate - light is the fastest known thing so.. i would think that transmitting data in this manner would be the best and fastest way...
Phyllis Sippernore - Sun, 21 Jun 2015 00:35:13 EST ID:FJ+CwDYK No.6723 Ignore Report Quick Reply
Any electromagnetic wave travels through space at the same speed as light. So in terms of latency, light communication isn't any faster than normal radio communication that we use today. However, optical communication does provide way more bandwidth than radio. Because light has such a short wavelength, a lot more information can be crammed inside a given time frame.

Getting it to work over long distances is a challenge because it takes a lot of power to generate a light signal strong enough to be detected really far away, and the beam must be focussed at the receiver. Technology is starting to catch up to where we can use optical communication at further and further distances:

Phineas Grimford - Mon, 22 Jun 2015 08:21:12 EST ID:nbIafuF3 No.6725 Ignore Report Quick Reply
There's an interesting research paper about this put out by Disney (Yes, that Disney) about specifically this.
You see, an LED is not only an transmitter, but also a receiver, as there is a slight but still there change in resistance when it receives light input of specified bands, usually split by the plastic coating on it.
Hence you can image that if you were to adapt a device to receive and transmit using only one LED, then you could have two of these devices, and do an I2C style master slave transmission routine, that scales up to an arbitrary amount of devices.
I think they get like, 8kb per second over a tiny ass range, but it just werks though.

(Warning, this will start talking at you without any input, so be aware)

Electric Bike Battery by Fuck Chushmin - Mon, 23 Mar 2015 14:26:44 EST ID:bEWGmaWL No.6671 Ignore Report Reply Quick Reply
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I hope this is the right board for this thread. Basically I forgot to put my electric bike battery into my car before driving off after a ride the other day and managed to reverse over it in a fit of idiocy, cracking the lower part where the battery connects with its cradle on the bike, as seen in the image. It worked intermittently afterwards, cutting out after bumps for a few seconds and otherwise working fine. Now I have opened it up and managed not to electrocute myself, I have discovered there are two loose wires and no other visible damage, which leads me to believe the whole thing can be salvaged (which is good as they are hideously expensive).

What I need to know from you guys is 1) Where does the loose red wire hanging down above the pack itself go? I think it might attach to the other side of the fuse but I am not sure

2) how should I attach the other red wire to the fuse (one with the coil)? What is the purpose of the coil? can I just solder it on?

Thanks in advance for your help, and my apologies for the triviality of this issue, I think my guesses are probably correct but I don't want to make any mistakes and ruin the whole battery.
Nicholas Briffingstock - Mon, 23 Mar 2015 18:05:01 EST ID:7JSxEYqU No.6672 Ignore Report Quick Reply
Eh, I'd google for plans or repair guides for this specific model of battery.

That 'coil' looks like a crooked contact spring to me, (on the top of the picture)
From the looks of it the red wire on the bottom has been broken off next to it.

Before you proceed you'd have to know what wires are connected to what and how exactly the cells are wired. I hope you have a multimeter and know how to use it, right?

The other thing is, I wouldn't mess with a li-ion battery without knowing exactly what I'm doing. There are several things that can go dangerously wrong with them (They can pop release toxic gasses/explode/catch fire if handled incorrectly) And depending on how they are wired it's fairly easy to do something wrong.

I think you should look for a fellow e-bike enthusiast who also runs a shop in your area or try to meet up with somebody if that battery is so important.
Polly Faffingwater - Fri, 19 Jun 2015 04:31:20 EST ID:NiQxsM8d No.6721 Ignore Report Quick Reply
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Judging by the blob of solder on the loose red wire, I'd say it belongs up next to the red wire with the spring, where there is a terminal with a blob of broken solder.

I'm also guessing that is the fuse, so that would tell me that the terminal with the blob of broken solder is not supposed to be touching the red wire with the spring and needs to be bent away so that it does not touch.

Ideally that wire would be soldered in place but if that's not practical you might or might not get away with using a little bit of wire and some tape to tie it into place, remember you could cause a fire inside the battery and subsequent explosion if this connection is not secure and tight. Tight is right.

If that actually is the fuse up there I'd also check its not blown, if it is blown, try replacing it but resist the temptation to bypass it by touching the two red wires back together as it might be a sign the battery is actually fucked.

Also remember that I'm just a guy on the internet and if you try this repair yourself and my advice is wrong you could end up blowing up the battery, but no worries really since its already fucked anyway.. as long as your house doesn't burn down or something because of it.

CS major. Want to design custom cameras by Molly Perryman - Sun, 07 Jun 2015 04:04:20 EST ID:juI5Twgu No.6711 Ignore Report Reply Quick Reply
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Title says it all. What should I study as an undergrad/in grad school to be able to have a shot a pursuing a dream? I want to reinvent cameras by breathing new life to established methods. Should I study physics too? Or engineering? What kind?
Reuben Trotdale - Tue, 16 Jun 2015 06:58:44 EST ID:ThzzSwK2 No.6719 Ignore Report Quick Reply

you're kind of fucked because camera development is an EE field not a CS one

so, assuming you want to actually make new cameras (ie a shutter system) make a simple security camera with an ardunio or make an older film camera. The quality will be laughably low but you'll learn a lot of important stuff. Also, how much experience do you have with a photo lab?

Drugs and Engineers by Fanny Pandlebanks - Thu, 19 Jun 2014 11:43:21 EST ID:995bEAnC No.6367 Ignore Report Reply Quick Reply
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This is just out of curiosity, /tesla/.
I'm a first year Mechanical Engineering student, and in my uni almost everyone is a regular joe who mainly drinks alcohol at parties and such. I don't know if that's just where I live.
Considering 420chan is an imageboard for people that enjoy doing drugs, and we have an Engineering board, tell me, what drugs do you usually do? Since I don't know any dopehead engineers, I'd like to know what do you fancy the most (Of course, I know that not all of us do drugs. But I'm asking the ones who do).
21 posts and 3 images omitted. Click Reply to view.
Cyril Hommerdit - Sun, 29 Mar 2015 21:05:04 EST ID:5uUE4vv8 No.6674 Ignore Report Quick Reply
I hope he knows what he's taking
Phyllis Trotgold - Wed, 01 Apr 2015 16:45:15 EST ID:DKM7qcdl No.6675 Ignore Report Quick Reply

you sound like a complete douchebag.
Beatrice Tillinglock - Wed, 01 Apr 2015 22:36:54 EST ID:ZCX58SIS No.6676 Ignore Report Quick Reply
Dragon Detected
Martha Nickledale - Fri, 24 Apr 2015 20:03:09 EST ID:YIXh3/Ig No.6685 Ignore Report Quick Reply
Senior in chemical engineering here. About to graduate with a 3.9.

I smoke weed every day. I drink at least four times a week (not counting a beer or two with dinner, which is a daily ritual for me). I do shrooms/LSD occasionally, whenever I have the opportunity to go somewhere cool with my friends to do it (I'm over tripping in my room). I go out/go to parties Thursdays, Fridays and Saturdays just about every week, and maybe some Tuesdays and Wednesdays depending on what's going on.

You can get all kinds of fucked up and still succeed as an engineer, as long as you learn to manage your time. If you do your work in the late afternoon/early evening, then you can drink, smoke pot and do whatever in the night. I've never had to pull an all nighter for school work.

Another big thing is go to class. Maybe you're still in the high school phase where everyone goes to every class, but as you go on in engineering, you'll see a lot of people who just don't show up. Most of my classes are usually about 50% full. People skip class, don't know what's going on, then get wrecked on exams, and act surprised. Just go to class.

Anyway, I hope you find some cool engineers to get stoned with.
Albert Necklenark - Sat, 13 Jun 2015 00:24:56 EST ID:RMl5Qdtt No.6718 Ignore Report Quick Reply
Why does he sound like a douche bag, it doesn't say anything about him telling the guy its not what ever it is. And hopefully dude would be smart enough to realize it doesn't have an imprint on it

ZAMA Carb Problems by Eliza Billinglock - Fri, 05 Jun 2015 17:29:41 EST ID:cymD6AGd No.6706 Ignore Report Reply Quick Reply
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Hey /tesla/

I recently took apart an old TORO weed whacker that hadn't run in like 12 years, and got it running...briefly. It started up for like 2 seconds, and shut down.
I figured out after pulling the cord a bunch of times that the engine was being flooded. This was indicated by fuel spitting out of the exhaust. So I sat and thought about it and disconnected the fuel intake line from the carburetor. Sure enough, after a few pulls on the cord, it started up and ran for a good 8 seconds with a few revs before it shut down. So it ran on magic.
So it's either getting too much fuel, or not enough air. Too much fuel I'm thinking.
I can't find anything on how to adjust an old ZAMA carburetor online though. They're all newer models. This one doesn't have the priming bulb.
Nicholas Gerrywit - Sat, 06 Jun 2015 13:14:04 EST ID:cymD6AGd No.6709 Ignore Report Quick Reply
Sophie Minnerfotch - Sat, 06 Jun 2015 20:42:28 EST ID:a5xmRWEe No.6710 Ignore Report Quick Reply
pictures of carb plz

does it have any adjustment screws on it? I would start messing with those, just monitor how much rotation you apply so you can reverse it. also get some new premium gas from a clean can, and check the spark plug. also check any filters that could be affecting fuel flow.
Edwin Cogglestock - Sun, 07 Jun 2015 09:47:20 EST ID:cymD6AGd No.6714 Ignore Report Quick Reply
I think I'll have to adjust the amount of fuel that's allowed by sealing the end of the fuel line and making a needle puncture sized tiny aperture thingy. That might do it...
Walter Dendleped - Sun, 07 Jun 2015 21:13:18 EST ID:cymD6AGd No.6715 Ignore Report Quick Reply
Okay, that didn't really work any better. All it did was make the fuel move through the line slower, which meant a bunch more pulls just to have it run for like 4 seconds. So, maybe it needs more air AND less fuel. Here are a couple images that resemble it. It's late and I don't feel like going down to the garage to get a better look for a model number on it. All the fuel is nice, and the spark is ferocious. I may just disassemble the carb again. Maybe the problem is the needle is too loose?



William Bardson - Sun, 07 Jun 2015 21:35:36 EST ID:a5xmRWEe No.6716 Ignore Report Quick Reply
I dunno man. I don't know much about carburetors. But I would also check airflow/filter.

Here's a link that might help

Concrete Formula for small/medium size objects by Polly Chorringdock - Wed, 18 Mar 2015 16:48:17 EST ID:7JSxEYqU No.6665 Ignore Report Reply Quick Reply
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I am looking for a good concrete formula to pour into molds.
Currently I am using this: 2 parts portland-composite cement (CEM II), 1 part Sand, 1 part water.
I'm ok with the consistency of the mixture, it flows enough to be poured into the molds and it represents details well enough.

The problem I have with it that the surface is dusty to the touch, I'm looking for something that you can wipe fingers over it and they stay clean.
It should also be able to be done using common hardware store ingredients, and not be in the price range of specialized mixtures sold for this purpose.

The final project should be to make viable speaker enclosures with the concrete poured cnc machined EPS foam molds.
Any additives are fine as long as they are non-toxic and not expensive.

I've read about steel wool for instance.
3 posts omitted. Click Reply to view.
Oliver Hocklestock - Sat, 25 Apr 2015 14:41:17 EST ID:crpd18/b No.6686 Ignore Report Quick Reply
Old thread, OP did you ever consider wax paper?
Hamilton Billingridge - Tue, 28 Apr 2015 10:49:02 EST ID:a5xmRWEe No.6688 Ignore Report Quick Reply
Oliver Candleswatch - Mon, 04 May 2015 13:45:43 EST ID:BxGNplro No.6689 Ignore Report Quick Reply
Sounds like the concrete hasn't properly cured. You should look up immersion curing, especially since your water to cement ratio is below .4 which will cause a tendency for it to dry out. Long story short, after the concrete sets, you need to immerse it in water for a period of time for the cement hydration to complete. The amount of time will vary greatly on temperature/etc., but that should help you out I hope?
Molly Perryman - Sun, 07 Jun 2015 04:16:45 EST ID:juI5Twgu No.6712 Ignore Report Quick Reply
powdery feel is dried out concrete. concrete can be finished with stains too which can look quite fantastic if done right. most are water based, perhaps hydrate in a stain?
Molly Perryman - Sun, 07 Jun 2015 04:18:58 EST ID:juI5Twgu No.6713 Ignore Report Quick Reply
omg OPEE pls do like a batik technique with red and maybe blue dye. then use a polishing from 60-200 grit. maybe dye after? IDK lol

how do I into muhsheen by Walter Follerkog - Sat, 16 May 2015 08:11:57 EST ID:zW9F9Fu+ No.6694 Ignore Report Reply Quick Reply
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What's the component of (what I assume machine) engineering education that makes one machine-savvy?

I'm an upstart 3D artist and I view the huge popularity of organic and fantasy-themed work among amateurs as a result of people in general lacking technical education. We just don't know shit about how anything works, we don't recognize, interpret or memorize individual mechanisms etc. Picrelated is a good example, I have just the foggiest idea why that hatch looks the way it does and I'd never reproduce most of the detail it has (I'd do a mostly featureless "Apple" casing). If I had to flesh out the innards of some factory ruins I'd have to spend a day googling stuff before even getting an idea on how it's supposed to appear, let alone withstand any scrutiny.

Even mainstream fiction's partially dominated by fantasy (when you throw out all the non-fictitious settings), you can get away with shit, man made environment is hardly ever the focus (unless were talk glowing magical gems or swords). Sure it gets botched as well, but it's easier to brush off, since it's not supposed to be historically accurate and muh magic (boy, I sure wish Vikings had that excuse). Sci-fi on the other hand... it's pretty easy to ruin the enjoyment of something through sheer ignorance the author displays.

So, how do I educate myself (on the internet, for free)? I obviously don't need to learn much about materials or the math as I'll never attempt to build anything, but I want to make believable looking machines. Even for people who know their shit. I want to be confident I can deliver something nobody will cringe painfully at.
1 posts and 1 images omitted. Click Reply to view.
James Cirringkit - Tue, 19 May 2015 09:05:59 EST ID:cymD6AGd No.6699 Ignore Report Quick Reply
Check out edX. Open courseware from top colleges and universities. I'm auditing a bunch of courses right now. Mostly science stuff.
Phyllis Niggerford - Thu, 28 May 2015 12:53:57 EST ID:crpd18/b No.6701 Ignore Report Quick Reply
Mechanical Engineering is mostly about the physical deign principles, yeah.
Molly Wammernane - Tue, 02 Jun 2015 16:06:49 EST ID:uaN8rW3i No.6704 Ignore Report Quick Reply
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for that hatch, it's the weak point in a vessel that has to withstand a lot of pressure. the spacecraft (?) is a giant balloon, and that hatch is like sewing a patch into it. maybe it' still has to work even if something dents the outside.

in my opinion, it's better to understand the concepts and extrapolate the details, rather than copying the details (which may not make sense out of context).


thanks for this post, I love those links
Oliver Copperway - Thu, 04 Jun 2015 21:43:25 EST ID:JFQ3oC7N No.6705 Ignore Report Quick Reply
I went to an engineering school, though my focus was more in the area of chemical engineering.

In any case, at some point, I decided I wanted more "machine-savy," which I took to mean understanding how things are actually assembled and function in the real world. In the end, I took a course in machining metal, on mills and lathes. It was at a trade school, and rather intense (3 hours per day for two semesters), but I think it gave me a perspective of these things which would be hard to get in other ways.

At one level, we were making things like threaded screws or teeth on gears. There is a lot of nuance to the design of these things, which doesn't come out unless one is designing or building them. At another level, the machines themselves (the mills, lathes, and others) had intricacies which had to be understood. Which gears to use, how to align belts or shafts, etc.

Short of going through a full course in manufacturing engineering to see all the methods by which things are made, I highly recommend the series of YouTube videos by Dan Gelbart. The man has a ton of patents, and is easily a multimillionaire from his inventions, but takes the time to sit down in an amazing shop (his personal, home shop, that would rival those in many universities or tech firms) and create detailed tutorials. If you go through the 18 videos, I guarantee you'll see the various manufactured objects around you in a different light.

For your viewing pleasure:
John Sebberhall - Fri, 05 Jun 2015 23:23:28 EST ID:JFQ3oC7N No.6707 Ignore Report Quick Reply
Also recommend this one, not so much for its instructional value as that it is pretty fun to watch when blazed.


Hydraulics by Nell Wummlelock - Tue, 12 May 2015 22:52:22 EST ID:VRaAIqx8 No.6692 Ignore Report Reply Quick Reply
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I've been working at a hydraulic repair shop recently. Tearing cylinders apart, cleaning them, measuring and replacing seals, getting to know the details of how they work, what makes them break, and how to put them back together so they don't break as easily.

I've got two years of an engineering degree down, got sent to afghanistan, and now want to finish a degree in mechanical engineering.

Anyone know much about this area? I want to keep working with hydraulics and make use of a bachelors degree in mech eng.
Fanny Sugglebit - Thu, 14 May 2015 22:46:16 EST ID:a5xmRWEe No.6693 Ignore Report Quick Reply
so would you say you have some experience and expertise in the practice of lifting, bro?

go work for lippert, the trailer business is booming and their hydraulics could use some expertise

Spacetime Inertia by Albert Mannersid - Thu, 25 Sep 2014 16:31:41 EST ID:RVngPBEo No.6499 Ignore Report Reply Quick Reply
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So does the "Spacetime fabric" have a capacity for inertia? It's stuff, isn't it? so if you applied enough inertia, you could warp it. And could this relate at all to zero friction, which, apparently impossible, could be approached with fluids of varying viscosity in a torus?

Some OC from our concerned TAs
11 posts and 1 images omitted. Click Reply to view.
Reuben Honeydock - Tue, 03 Feb 2015 17:07:47 EST ID:RVngPBEo No.6634 Ignore Report Quick Reply

I've been AFK on this thread for a couple months and came back to find some really cool responses. Thanks y'all.

If only there were a way to electromagnetically compress a DT vapor, while blasting it with a bunch of lasers or a particle beam.
Reuben Honeydock - Tue, 03 Feb 2015 17:09:23 EST ID:RVngPBEo No.6635 Ignore Report Quick Reply
which would allow control towards a constant level of fuel in the reactor...
William Purrysodge - Mon, 16 Feb 2015 20:05:11 EST ID:Jk2UBRNv No.6643 Ignore Report Quick Reply
Last bump I'll give this thread:
Where can I learn more about fusion? I want to help the world, but I don't know where to start learning. I want to learn as much as I can about this jazz without becoming Grant Green. Thinking what can I do to help the process along? Good sources of info. I figure one more mind working at the matter couldn't hurt.
Fucking Nonningfoot - Tue, 03 Mar 2015 12:22:36 EST ID:u3tdwnEw No.6649 Ignore Report Quick Reply
Not on the subject of space-time fabric, but is there a principle limit to superfluidics? I had read that for certain materials, superfluid rotation is accompanied by vortices in the material. With sufficient size, would there be a competition between the vortex speeds and cooling due to expansion, etc? I imagine by definition a superfluid is in an "optimal" configuration of atoms, so what would happen if it was exposed to expansion forces which exceeded some property of the system?
Jack Brabblesack - Thu, 23 Apr 2015 01:05:07 EST ID:11+UlMUB No.6684 Ignore Report Quick Reply
Why not sound? Suspended into a combined magnetic webbing of some sort (mind you this is just me spitting shit) maybe use these magnets to potentially coax a "flow" of electrons from the "æther" or whatever you'd wanna call it. I honestly doubt what i'm thinking will output the however required to bend the universe but then again i'm just spittin shit

Plagiarism for Excel VBA coding game by Jessica Burnesly - Fri, 09 May 2014 21:30:49 EST ID:4KbD3NyR No.6301 Ignore Report Reply Quick Reply
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My partner and I submitted our engineering final project to our professor by e-mail. He then responded within a few minutes that he found an exact replica of our coding used for our program online, but in Spanish. He then e-mailed the Dean and we have a meeting with him this Tuesday regarding it.

The project we were assigned was to make The Snake Game using Excel VBA coding. Our teacher taught us probably 25% of the material needed to complete this task so my partner and I went online, went through a four part tutorial on how to make a Snake Game using Microsoft Visual Basic (VB).

We followed the tutorial, went through with it and submitted it. Our teacher submitted it to our Dean and we are meeting with him Tuesday. Is there any way out of this? We got a zero for the assignment which means my partner and I are most likely going to fail the class. She's kinda freaking out. Any advice 420?

Here's the tutorial we used in order to learn how to do the game -

>Inb4 Engineering college using Excel VBA
>Inb4 you done goof'd
4 posts omitted. Click Reply to view.
Eliza Brungerfere - Tue, 13 May 2014 11:41:17 EST ID:wSROKVi8 No.6308 Ignore Report Quick Reply
The tutorial in and of itself isn't the problem, op copy paste coding his project is the problem, this thread is on like 3 boards right now and every time someone asks if he just copied the tutorial he deflects and talks about how his prof didn't teach him how to write the program.
Graham Drundershaw - Tue, 13 May 2014 20:06:39 EST ID:ptIHeeuT No.6310 Ignore Report Quick Reply
Oh god, this dope from over at /qq/

Don't try to go elsewhere to validate your warped integrity OP, you're a plagiarist and a faggot and should just drop out of college since you obviously don't wanna do the hard work anyway.
Jarvis Crazzlebire - Wed, 14 May 2014 23:25:49 EST ID:GVO9rLbP No.6313 Ignore Report Quick Reply
>I also have to do a VBA assignment and we actually are encouraged to find stuff online and use it.

There's a huge difference between:
  • incorporating other's code as a separate module in a clearly documented, clearly referenced, clearly isolated manner where your code wrap around other's code, versus
  • trying to pass off other's code as your own.
Besides, if and when they tell you that you can use something, then they will also include the correct manner to utilize that something to not be counted as plagiarism. If it hasn't explicit tell you how to include something safely, then you should assume you can't use that something just to be on the safe side.

>If your assingment doesn`t explicitly forbid using something like a tutorial your teacher won`t have shit. Just say you didn`t know and hope for the best.

Professor "won't have shit" usually will not matter to universities, since students are always presumed guilty until proven innocent. Many professors will try to lower their workload by getting their auto checks software to maximize the potential to flag any student's work as "plagiarism". If you happen to get of those professor, then it's the student's job to preempt them by properly documenting their coding process and design process. This may includes having good version control of the coding environment to show clear progression in any changes of the code, and having screen capture video recordings of the entire coding process. Universities will still get paid whether students successfully overturn any plagiarism charge or not. Professors won't lose their job if they falsely accused students of plagiarism, and any reputation risk they might suffer has been offset to the auto-checking code-matching engines.
Cornelius Dullerhood - Wed, 22 Apr 2015 14:27:51 EST ID:HZh+U85X No.6681 Ignore Report Quick Reply

>Professor "won't have shit" usually will not matter to universities, since students are always presumed guilty until proven innocent. Many professors will try to lower their workload by getting their auto checks software to maximize the potential to flag any student's work as "plagiarism". If you happen to get of those professor, then it's the student's job to preempt them by properly documenting their coding process and design process. This may includes having good version control of the coding environment to show clear progression in any changes of the code, and having screen capture video recordings of the entire coding process. Universities will still get paid whether students successfully overturn any plagiarism charge or not. Professors won't lose their job if they falsely accused students of plagiarism, and any reputation risk they might suffer has been offset to the auto-checking code-matching engines.

i hate to agree with him, but, in the modern educational system (including but not limited to the public school systems), if someone in Authority so much as even whispers an accusation of this or that about you to the right ears, youre pretty much fucked, weather or not you copied/plagiarized so much as even a sentence of code from elsewhere, or did some other sort of no-no.

worst case scenario, imo, is you have to take your licks with a coke and a smile and shutting the fuck up about coincidental injustice, and try again either next semester, or wait 4 years and get into the next crop-rotation of students, or you could drop out of college (more or less) and strive for a purely educational purpose and just learn the stuff to know it, and forget any pretense of college credits or Goodly and Proper Documentation/Certification of skills-building for employment enrichment.
Hugh Sublingworth - Tue, 05 May 2015 22:54:53 EST ID:Uzk1BXOo No.6690 Ignore Report Quick Reply

I swear this is copy pasta from like 6 years ago.

Are you tired of wind farms? Y or N? by David Pebblebodging - Thu, 18 Dec 2014 08:28:19 EST ID:9NbC6G5g No.6596 Ignore Report Reply Quick Reply
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Wind Farms - Yes or No. UK Poll by David Cameron. Do you support off shore wind farms? Or in David's words, are you tired of them?

2 posts omitted. Click Reply to view.
Esther Donningwit - Thu, 25 Dec 2014 06:23:13 EST ID:92tMe0ay No.6599 Ignore Report Quick Reply
But it was first when you can get government support for it they started to sprout
Phoebe Subberpick - Sat, 28 Feb 2015 05:43:23 EST ID:eVPwfH4N No.6646 Ignore Report Quick Reply
i dont see why thats a problem
incentivising the adoption of developing technologies is essential to the growth of those technologies as well as the countries ability to stay competitive in the future
Sophie Beffingmune - Mon, 02 Mar 2015 20:38:59 EST ID:a5xmRWEe No.6647 Ignore Report Quick Reply
integrating them into existing/new structures seems like a much better idea.
Fucking Nonningfoot - Tue, 03 Mar 2015 12:19:13 EST ID:u3tdwnEw No.6648 Ignore Report Quick Reply
A comparison can be made to nuclear technologies. The U.S. government invested more than 25 billion before the first commercial plants were produced. Since then they've gotten more improved.

Nuclear is even more alluring because wind turbines have fundamental issues that prevent them from enhancing efficiency that are well researched. Only reduction in cost is from reducing the material cost, or reducing losses in storage or transfer, which aren't likely to substantially reduce (though storage may come down because of the companionship with solar futures).

Nuclear has thermodynamic limits, but it is incredibly potent as-is, and a slight improvement in materials can lead to a dramatic improvement in power output (say if the operating temperature can be bumped from 100C to 200C, the efficiency goes from like 30-40% to 50% or higher)
cuntwaffle - Mon, 16 Mar 2015 19:47:41 EST ID:N2aieJam No.6664 Ignore Report Quick Reply
Yeah it would be good

Arduino: More Analog In? by Pez - Sun, 15 Mar 2015 16:56:40 EST ID:xfGCXuR4 No.6658 Ignore Report Reply Quick Reply
File: 1426453000836.jpg -(786482B / 768.05KB, 1297x708) Thumbnail displayed, click image for full size. 786482
Yo, I'm making a MIDI sequencer using an arduino mega. As standard it's got 16 analog inputs. However, the sequencer I'm making has 16 steps, and I want each to have it's own frequency knob as well as velocity knob, and there may be a couple more needed elsewhere on the controller, so I'm looking at 32+ analog ins.
I've seen I could get a multiplexer to increase inputs, but from what I understand I'd have to first select the knob I wanted to control and only then the value would be read. Whereas what I want is for the changes to be instantaneous, so I could change several knobs at the same time without having to select them. Anyone got any advice on this? I'm stumped.
Albert Mommlelet - Sun, 15 Mar 2015 19:40:27 EST ID:JFQ3oC7N No.6659 Ignore Report Quick Reply
Let's say the arduino did have more analog inputs. Say 32 or 64. You could connect all your inputs simultaneously, but think about your code: you've still got to read an input, do an action, go to the next input, and so on, so it's never truly instantaneous. You're going through a loop, and hitting every input along the way. Maybe the loop executes 100 times per second, so there's a .01 sec delay, at most, from your knobs. If it happens that you have to multiplex your inputs, this may add, say 1ms on top of whatever else is going on. It won't be instant, but for all intents and purposes, you'll likely not notice the time delay.

If you find that you need something truly simultaneous, the arduino probably will not do. Why? Because it works sequentially. It can look at an input, do something, and then do the next thing. A musical instrument, of course, can multitask: all the strings on a harp can vibrate independent of one another. If you find that you absolutely need this type of processing, the arduino may limit you. First, it is fast, but not breathtakingly so, and second, because it cannot process inputs in parallel.

There are two types of chips, called DSPs and FPGAs, which are more suited to high speed processing of many inputs. They are very different to program than the arduino, but they do find use in high-end audio applications.

That being said, I think the arduino, plus a multiplexer, will be more capable than you're inclined to believe, for sequencing MIDI. Multiplexers can work extremely quickly, and interface readily with the arduino.
George Fopperworth - Sun, 15 Mar 2015 19:44:03 EST ID:7JSxEYqU No.6660 Ignore Report Quick Reply
This should actually be pretty easy.
Simply group the potentiometers into groups of 16s and switch their supply voltage/ground voltage pins between +5V/0V and floating respectively.
All it should take is one npn and one pnp transistor per pair and a gpio pin.
George Fopperworth - Sun, 15 Mar 2015 19:48:51 EST ID:7JSxEYqU No.6661 Ignore Report Quick Reply
just figured just npns should be fine wired correctly.

If it's not clear you measure pot groups in turns.
George Fopperworth - Sun, 15 Mar 2015 19:55:39 EST ID:7JSxEYqU No.6662 Ignore Report Quick Reply
oh and you won't get the full 10 bit range because of the voltage drop with the same power supply, it won't hardly matter though, since all you need is 7 bit.
Pez - Mon, 16 Mar 2015 04:42:32 EST ID:xfGCXuR4 No.6663 Ignore Report Quick Reply
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Cheers guys. Feel a bit dumb now for not realising this

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