if it's right at eye level, i would suggest that it is likely simply an additional portal that was included either intending to be used for an additional screen (which was cut) or perhaps an alternate pay mechanism location (maybe a manual operation would need to be higher to function)?

the picture was probably an absolute afterthought, 'oh shit what do we stick in this hole'?

>>3906
Either ^this or it's the location where the machines normally would have some sort of Product Identity like a big "Lays Brand™" logo or some such. But since it's at a school there may be some sort of "no advertising to kids" law or rule or whatever, so they had to come up with something to fill the space.

Either way you know it wasn't the engineering department's decision, because engineers would have used that space for something worthwhile like a palm scanner connected to an online snack account or at the very least a bunch of blinky lights because fuck yeah blinky lights!

OP I fucking love this thread. The same vending machine is in my apt building and I fucking laugh every time I see it. I think this pic is on every machine lol

http://boards.420chan.org/b/src/1336036441062.png

DICKS EVERYWHERE

You'd have a better chance at finding a good mining job in North Dakota or West Virginia as a mining engineer.

>>3976
it can be done but expect shit, like sorting rock core samples for 12 hours a day on your feet in 40 degree heat

>>3984

40 degrees isn't hot at all

>>3986

CELSIUS DUN DUN DUNNNNN

>>3976
it's hard to get a job running the stuff there right away.
but you could apply to migrate there (it helps if you have a good record or skills)
and get a job repairing the machinery. it's dangerous as fuck though.

but with time you should be able to gain on the job experience. contact the embassy.

buy some sound dampening materials (thick foam, scrap carpet, etc...)

Try to keep in mind a lot of what makes this device works is a free flow of air, and most things you could to do 'muffle' the sound would involve interfering with this flow.

I would say apart from installing some dampening materials inside the unit itself and making sure nothing rattles, your only other bet is to place it somewhere in the room where it won't acoustically amplify, and perhaps even treating that part of the room to absorb more sound, or decoupling it from the floor with something to reduce how much sound it can make.

If you do mess with the inside, also keep in mind these sorts of things typically produce condensation, and if you put something in there to keep the rattling down or to reduce sound transmission, you could very well absorb a lot of water and possibly cause an electrical hazard.

TL;DR, if everything is screwed tight, there isn't a whole lot you can do.

thanks.

I have some of these studio absorbers (pyramid foam) which might help. The easiest way would be sticking some directly onto the case (without inlet and outlet of course)

A no brainer is the hose: Although it isn't the major source of sound using a insulated one should for one improve performance and reduce the sound level.

Next, probably more related to engineering is the way it's thermostat works: It's only on/off.
I can choose between low/med/high and it runs on that level until it reaches the temp and the switches of the compressor.
What would certainly reduce the annoyance is building in a continuous control.
There are some devices which already have that but they are very expensive.

I know I have 2-3 options:
.) simple thyristor dimmer which would produce vibrations in the motors.
.) rotary coil transformer controlled by a servo. (probably won't work because of the amount of power consumed by the AC)
.) real variable frequency drive for both motors

Comment too long. Click here to view the full text.

>>4029

You can buy a simple temperature probe that you plug the unit into (the controller into the wall), set it and forget it. They retail for like $60

>>4030
Those are on/off too. Wouldn't really help.
I somewhat got used to the noise by now, preferable to heat.

I know there aren't really climate controllers with a continuous control they are all just high/low/on/off etc..
I was looking for that a long time for a growroom.

That doesn't really exist as a mass product, I can't really understand why though, an AC with that feature built in would fly off the shelf once people realize how much less annoying it would be...

>>4005
It's 2 years more...

>>4011

most people are lucky to afford 4 years of school....

OP, it's probably worth remember that the UK (English and Scottish) systems of education treat medicine and engineering (and degrees in general) differently to the US, so his advice may have been coloured by this.

If you're choosing between medicine and engineering in the UK, then you're probably 18 and just about to leave secondary school (or 6th form college in Engerlund). Medicine is an undergraduate degree. You don't really 'major' in a subject here, the degrees are more focused, you receive a degree in XXX or YYY.

>hell i dont know whether or not im going to enjoy engineering circuits or engines since I have no previous experienc

no one who goes in EE from a lyceum on the european continent knows this.

OP i am a second year EEE student in UK. This subject is boring AS FUCK. Seriously, its dull but the career prospects pay well. Thats the motivation. If you study music it might be fun but there is no job. Cosmic balance

Fuck everyone else if you wanna make boss cash do electrical

I don't but my friends Google and Bing do.

what a faggot

>>3977

my point is that my homie wolfram here uses 2's in a base 2 number system.

>>3978

No it isn't, it just added the numbers and assumed "binary" to be a constant/variable

the notation you're looking for is:
prefix binary numbers with 0b
eg,
0b1010 + 0b1111 for 1010 + 1111

he_mad.jpg

>>3975
this works too:
111110111b + 111011100b
nb

>>3971

Off the top of my head, two things.

1) the array would have to be very large for much benefit

2) the way you have the gas exiting, it wouldn't generate much power. At a certain point the expanding gas would equal in pressure to the force exerted by spring to the point it either stays open (or more likely, slightly oscillates between open and close). The only way to combat that is to figure out a system of rapid cooling on the tube which feeds the gas back into the system so that it contracts further back and provides some utility.

Err that doesnt make sense

So the red wire max 1.2A right?
And green max 400 mA

The cable to the LED is about 4.5 metre long

> I have a circuit with 18 LED modules, of 30w each,

Got any better docs on those modules? If you pull 400mA through each LED in a module you're using 38 watts, so you probably don't want to be doing that if they're only rated for 30watts TPD each.

At that power they have to be LED spot lights or stage lights or something. What voltage do they, themselves want to be driven at? You could potentially let the smoke out if you try to drive them at the full 30 volts your power supply is putting out.

> AWG 24

If I remember correctly, 24AWG copper is commonly rated for 3.5 amps if it's in free air and 2A if enclosed. Aluminum wire is less (seriously, don't use aluminum wire, just don't), and you have to derate if you have a bunch of wires in a bundle. These are rule of thumb ratings; the actual maximums vary with the insulation material, the wire length, and so on and take a bit of math to work out. Whatever wire you buy should come with a rating on the label, so you probably want to go with thatinstead of what you read off an image board.

However, since you're feeding all 18 LED modules off of one common line, assuming they really are 30W each, then you're looking at a worst case with all LED's fully on of 540 watts. At 30Volts that's 18Amps, which is way too much for 24AWG. That will need at least 16AWG, and I'm not even really comfortable with that. If you feed each LED module separately, then each only uses 1 amp, which 24AWG can theoretically handle, but only if you keep the different wires well separated from each other and don't bundle them together.

tl;dr: I personally would use something larger than 24AWG because it's a bit thin and flimsy and doesn't handle abuse like thicker wire gauges can, especially if these LED modules are going to be a long distance from the power supply.

>>3950

Thanks a lot! These are the leds http://m.dealextreme.com/p/30w-1500-lumen-rgb-led-emitter-metal-plate-39960

DICKS EVERYWHERE

>>3955

Dude's main argument is that cheating equates to ripping off legally protected things, and he won't do it because he doesn't want to go to court and be sued.

1. Engineers rip off a ton of shit that is NOT legally protected
   
2. Most companies will take apart competitors products and learn from them. Some just make straight copies and make enough alterations for an IP lawyer to say it is an original property
   

'cheating' is inherent in the concept of an industry. You will always have people who make new works to overcome the competition. And the competition will always try to copy or mimic these works to stay competitive. This is how industry advances.

God. This thread blows my mind.

Businesses cheat with engineers all the time. If I get a job at Sony I'll probably be asked to cheat. A manager would come to me and say "This company has this wonderful product that is displacing our portable music player sales. I'd like for you and a team of engineers to take it apart and figure out if we can make a comparable product without getting sued. Also, look over the part list and give us a breakdown of what you think they are spending on this thing per unit."

You're cheating because:

1. You're working in a team and not alone
   
2. You're probably using computers and tools to do your work and not doing it with pen and paper.
   
3. You are looking at a competitors product and not designing your own from scratch.
   
4. You're reverse engineering it to figure out what concepts were used instead of coming up with your own.
   
5. You're going to try to figure out what they spend on it, taking away their private information. They don't want you to know it, but here you are, ripping it out of their product.
   

6.. You're going to take what you learned from their product to make yours better. You will never give them credit. The advertising campaign will never mentioned that the next revision of you portable music player was influenced by the work of another team. No, the commercials will make it sound like you pulled it all out of the air like Zues pulling lightening from a cloud. The only indication that your product rips them off will be the patents your compaign filed with the slightly different methods you developed to avoid their patents. But you didn't come up with those patents because you wanted to. You just needed them for the unlikely day you might go to court over your shit looking like some other shit. Also, in hopes that your method and the other guys methods are the only two ways to do what you both did, giving both companies legal leverage over the entire industry.

>>3957
Don't forget to mention engineers just use formulas/designs other engineers derived from their own independent work/research. Imagine a world where an engineer actually had to document everything, you'd spend most of your time reinventing the wheel for no good reason.

I don't see what is so hard to understand that grades are totally meaningless in college. The vast majority of teachers don't allow you to tackle the problem like you would in real life. It shouldn't matter how you go about answering the question as long as it's right and you can explain how you derived your work (or at least key concepts)...even if that means you read a research paper with the exact same problem that was answered by others (how is this any different then looking on someone else's test in the first place?)

College is bullshit. You'll realize it once you graduate and spend a couple years in the work force. The only purpose of college is to weed out the truly stupid and lazy; I don't think I've ever met a successful cheater who made it that far in life who was actually dumb. (they may not care about certain areas, but they make you learn so much irrelevant crap in college it is insane)

Its like these guys have never heard of Asia. Entire nations whose economy pivots on ripping off other countries.

Are you really going to set there and tell me that japan lacks any real engineers because their electronics industry got its legs by ripping off American designs? Do they not have any real mechanical, electrical, or automotive engineers because their auto industry got its legs by flat out taking a Harley Davidson factory in the 20s/30s?


And what about bad teachers? Your arguments pivot on the idea that all college programs are the same. That they are all the same and great and the only reason a student would ever do poorly is because they are stupid. You can look at the many different tuition levels and know that is false.


There is enough difference between programs, and enough bullshit in the real world that I'm not going to fault a kid for reworking a schaum's outline problem set or an old test to study for a new test. As long as the kid learns the material and isn't turning in shit they don't understand, I don't give a fuck how the kid gets his degree.

>>3959

I don't think I've ever heard a good explanation for why looking at old tests is wrong. You learn what to do by knowing what is expected from you. If the teacher is too lazy to change the problems, that is the fault of the teacher not the student who was diligently preparing.

>>3918
It depends entirely on

>What company you work for.
>What department your put in.
>What work your given to do.

Until then you a "general" engineering apprentice.

You could be put into signal and sensor diagnostics for company X, therefore you might fancy yourself as an electrical engineer. Initially you will go for a basic training and theoretical knowledge phase, then they will asses what you have an aptitude for and then put you in field that you are best suited for.

A mate of mine got an apprenticeship with Qinetiq when he was 16, he was pretty bight with maths and physics. I think he was put into R&D after training, but I think he is now working on mechanical and structural tolerances.

You could always be a plasma cutter operator, thats still engineering....

Hope that helps.

>>3919
Fuck, I should proof read more.