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RG6, dual, tri, or quad shield

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- Fri, 03 May 2013 11:16:00 EST WqMK7Yu4 No.5617
File: 1367594160666.png -(171964B / 167.93KB, 794x472) Thumbnail displayed, click image for full size. RG6, dual, tri, or quad shield
I posted this over in /tech/, but this might be a better section for it.

The wife and I are moving to our first home in a few weeks. There are no existing coax outlets anywhere in the house, so I plan on doing the wiring myself. I contemplated having the cable company do it for us, but from what I understand, most of them will make external penetrations into any room that needs an outlet, and I don't really want them drilling a bunch of holes into our house lol. Also, in our living room, I'd like the outlet on an internal wall that they wouldn't be able to get to otherwise.

Anyway, the house is a balloon frame type house, so in wall wiring should be really easy. I'm planning on doing 4 home runs (3 bedrooms and the living room) to the attic or basement (haven't decided which yet), and just asking the cable company to bring the service in there so they only need to make 1 penetration.

I'm planning on using regular RG6/U dual shielded coax... Is this a bad idea? Is there any real reason I should use tri or quad shield for such simple in-house wiring?

I'm planning on splitting them as follows:
1 2 way splitter
1 3 way splitter

-3.5db to one of the bedrooms (my office) where I'll have the cable modem
-7db to the living room where we'll have the high def tv
-10.5db to the 2 remaining bedrooms, where I don't foresee ever installing HD boxes.

Pic related

Take up heat and make electricity.

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- Mon, 31 Dec 2012 09:16:42 EST vNGGqnA0 No.5262
File: 1356963402789.jpg -(13598B / 13.28KB, 340x311) Thumbnail displayed, click image for full size. Take up heat and make electricity.
Would it be possible to build a device that can take the heat from the air and make electriity from it?
I read about a diode that emitted more energy than the electricity that was put in and it did it by cooling the air around it but i can't remember where i read it.

I am talking about regular air temperatures so it couldn't boil water and drive a turbine.
10 posts and 1 images omitted. Click View Thread to read.
Augustus Blinningkun - Tue, 23 Apr 2013 17:16:51 EST CkPPA1F2 No.5583 Reply
If heat from relativly low temperatures could be harnessed then there is energy everywhere to just take. Also if the heat from electrical devices could be put back into the device then it would need a very small input of energy. It would be good in many ways.
Fuck Giggleville - Sun, 28 Apr 2013 18:50:42 EST GKyi9Vnn No.5602 Reply
There is a device that takes the heat from air. it's called a wind turbine. wind is created by diffusion of hot and cold airs all around the world. the sun heats the hot air, and that air flows to cooler aired areas, creating a flow. Turbines take the momentum from that heated wind and turn that power into usable energy. thus cooling off the air it was taken from

Magic car bunghole

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- Thu, 25 Apr 2013 04:47:14 EST 4EHoLFFG No.5589
File: 1366879634574.jpg -(8297B / 8.10KB, 200x139) Thumbnail displayed, click image for full size. Magic car bunghole
I already showed this to /chem/, but I think this could be torn apart some more, and it falls under /tesla/'s purview, so let fly.

Basically, this guy's friend just fell off the turnip wagon and wants to invest in magical car assholes forged from a special alloy of unobtanium, handwavium, and pure, weapons-grade balonium.

Apparently it works because of atoms, and oxygen, and fucking magnets.
And if you don't believe in z55555, it's because your primitive intellect wouldn't understand allys and compositions and things with molecular structures.
1 posts omitted. Click View Thread to read.
Matilda Higglefag - Fri, 26 Apr 2013 13:03:56 EST afgIB1td No.5598 Reply
read the technical page, haven't laughed that hard in a while
Ernest Wacklesidge - Fri, 26 Apr 2013 13:23:45 EST CnxBC+8U No.5599 Reply
What scares me is most average consumers will believe that shit.

Food dehydrator

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- Fri, 12 Apr 2013 10:35:14 EST 8n/Y7E8q No.5559
File: 1365777314745.jpg -(72724B / 71.02KB, 1280x1024) Thumbnail displayed, click image for full size. Food dehydrator
I am thinking about building a food dehydrator. There are many very simple plans on the internet that use an incandescent light bulb or an old hairdryer or similar things to heat up the insides of a simple wooden box with a door and space for racks on which to place food.

But the best food dehydrators on the market have adjustable thermostats. So if I wanted one of those I'd have to make or construct a simple thermostat to put inside that can switch the heat on and off depending on the temperature. Any thoughts on where to source this or how to make a one?
6 posts omitted. Click View Thread to read.
Albert Dimmleham - Thu, 25 Apr 2013 15:09:24 EST 8n/Y7E8q No.5593 Reply
I didn't mean to sound cocky there, sorry about ballsing up the atmosphere of the place.

I'll keep you posted on my progress in the matter.
Hamilton Sallysag - Thu, 25 Apr 2013 22:50:00 EST buTeoEHV No.5595 Reply
Nonsense good sir,

I think some version of the arduino will be fine. No sense buying a microcontroller with lots of features like wifi, OLED screens or onboard speakers if you're just going to have it operating a custom appliance.

I saw that TI was releasing this the other day.
$13 is not a bad fucking price at all for a microcontroller.

It supports floating point, contains 12-bit ADCs and flash-programmable EEPROM.

You'll want to look in some electronics places for high temperature wire and high temperature thermoresistors or even active temp sensors if you'd like.

I think this has its own compiler or API, but Keil Microvision will work too and the demo is free. It has a software size limitation but I've written programs more complicated than this under that limit.

Energy yo

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- Tue, 12 Mar 2013 01:10:10 EST u/kJ3r46 No.5477
File: 1363065010771.jpg -(1406133B / 1.34MB, 1920x1200) Thumbnail displayed, click image for full size. Energy yo
Current second year chemical engineering major...
Anyone know a better way to turn work into energy, or vice versa, other than the steam cycle? That would solve our energy problems.
15 posts and 3 images omitted. Click View Thread to read.
Lydia Mammlestone - Sun, 14 Apr 2013 11:32:27 EST LovN/bXl No.5567 Reply
I mean derived from the sun, give us back delete, nb, etc.
Jenny Pickham - Fri, 19 Apr 2013 15:30:14 EST N+m0RwSh No.5570 Reply
There are all sorts of ways to turn heat into useful forms of energy. It's just that the steam cycle is still the most efficient for large scale power generation. Cars turn heat into work without steam. They're way more compact, but they're not nearly as efficient.

Audio Electronics

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- Wed, 10 Apr 2013 07:34:50 EST m7gIZk3I No.5556
File: 1365593690935.png -(2527901B / 2.41MB, 1000x1333) Thumbnail displayed, click image for full size. Audio Electronics
I've been interested in the subject for some time now and started my first project. Without proper research, just my own vision.
I bought a new bass since the old one was cheap shit. However the old one had more powerful EQ. Both have active pickups. I figured I've got no use for the old bass so I'd take the hardware out, put it in a box and run my new bass signal through it.

At first I got signal go through connecting TRS cable to the OUT wires with tape and the signal IN came from Bare, Yellow or Black inside those grey fat ones (both hold inside yellow, black, white, red and bare (white and red are grounds I guess, since they have been connected together with tape at the end of the fat one, fucking chinese engineers). Hope this made sense.

No matter where I made the signal go (yellow, black, bare or all of them) the knobs didn't alter the sound. Battery connected or not didn't make a difference. So what I'm asking here is, are these knobs controlling the pickups so that the pickup alter the EQ levels, if so, what does the chip do? I think the four knobs are low end, mid/high end eq's, volume and pickup mix.

Now when I try to connect it the same way it just spits out buzzing sound.
<- Messy picture

Feel free to point me in right direction. Where can I study this shit? What am I doing wrong?
Doris Trotridge - Wed, 10 Apr 2013 18:06:27 EST buTeoEHV No.5557 Reply
When you took the EQ out of the first guitar what did it look like?

>So what I'm asking here is, are these knobs controlling the pickups so that the >pickup alter the EQ levels, if so, what does the chip do?
Since everything is plugged into the board and they're active pickups, it's a safe bet to say that's where everything is being filtered or boosted from, as well as the volume most likely.

It's hard to tell what everything is, but I would assume the signal flow would go something like this:
Pickups -> pickup selector -> tone knobs -> volume knob -> out.

Now since it seems this is an active circuit it's possible those pots are just controlling the chip to do the tone controls, but I just realized, I'm not sure if any of this will matter.

Are you trying to connect the output of your new bass with the input of this and then send THAT to the amp?
That won't work quite as well if at all because the circuit is probably expecting an unamplified signal, and this EQ/preamp amplifies it.
If it does work, like say reducing the level before going back in.I think connecting that many components in line could add some serious noise to your sound, not to mention turning down a signal and then re amplifying it can be really noisy.

But if you're trying to put replace the active electronics in the new bass altogether it should just fit in there like the last one.


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- Fri, 05 Apr 2013 07:26:24 EST jhIUsBBF No.5547
File: 1365161184794.jpg -(44725B / 43.68KB, 500x349) Thumbnail displayed, click image for full size. Unsure
Hello /tesla/
I am currently 19 and am thinking about trying to major in engineering. I like seeing how things work, and did fairly well in math and science in high school. But I am extremely uneasy about making such a commitment (6-8 years?) and dropping ~50k for tuition and say... ~70k for living expenses for those total 6-8 years. I also hear engineers have nearly no free time during college.

I don't know what to do. Is this normal to have to drop that much money with loans? Is that what some of you are doing? And how did you figure out if engineering was the right path for you?
Isabella Fonnercocke - Sat, 06 Apr 2013 02:23:15 EST h/f6Un+K No.5549 Reply
>6-8 years?
only if you take 12 hours a semester and have 3+ co-ops, its pretty reasonable to finish in 4-5 years with one co-op. most of my expenses were covered by scholarships and some money from my parents so ill be graduating debt free, ~50k is about right for a state sponsored uni, living expenses depend on where you live. the last 3 semesters have been pretty stressful with work I only go out once a week or so.
I would have been happy with math, physics, comp sci, or any engineering but chemical, I settled on mechanical engineering because my school has a very good engineering program, and it's easy to find jobs in my area, but there's a fairly good demand for them in most parts of the country if I decide to move later.
Cedric Dobbermud - Sat, 06 Apr 2013 03:52:33 EST r+me8oJ/ No.5550 Reply
As stated before, it's a 4 year program. I did a Mechanical/Electrical degree and it took 4.5 years because I was an idiot and got involved with a Sorority girl who turned out to be a whore. If you can, live at home - it costs $8,000 a year in Canada for Engineering tuition, and I paid it all off by working in the Oil Sands.

You only don't have time if you can't manage it. I was able to go drinking once or twice a week with my study habits, just make sure you stay on top of your work.

Also, being able to do math pretty well in High School is a good indication of you being able to learn the more advanced stuff. Just don't go in all hot shit like a lot of people, because in the end, it's not what you learned from high school, it's the process of how you learned it.


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- Tue, 02 Apr 2013 23:27:49 EST w2QHIx2p No.5544
File: 1364959669381.jpg -(446724B / 436.25KB, 936x748) Thumbnail displayed, click image for full size. electroplating
is it possible to paint something in silver flake paint and then electroplate it? Are paints conductive enough?

This shit, what the fuck is it?

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- Sat, 30 Mar 2013 12:49:00 EST +k5EaOMo No.5535
File: 1364662140942.png -(321754B / 314.21KB, 1275x1650) Thumbnail displayed, click image for full size. This shit, what the fuck is it?
What the fuck is this shit?
3 posts and 1 images omitted. Click View Thread to read.
Phineas Higglesin - Sun, 31 Mar 2013 19:25:20 EST wai1gVQN No.5539 Reply

free energy machines are called perpetual motion machines in thermo
Archie Cricklepork - Mon, 01 Apr 2013 17:41:28 EST ND8I/rne No.5542 Reply
My boss told me all about free energy and how it's everywhere and big oil doesn't want us to know. I hate agreeing in fear of losing my job. 1 word rebuttal: Thermodynamics.
David Foddlehood - Mon, 01 Apr 2013 22:51:47 EST AInfxL6X No.5543 Reply
op it's scam peddled by someone who understands neither thermodynamics nor four-bar linkage design.

Choices choices

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- Sun, 06 Jan 2013 16:33:05 EST JHZsD1Ts No.5285
File: 1357507985064.jpg -(28662B / 27.99KB, 400x308) Thumbnail displayed, click image for full size. Choices choices
So soon I will need to make a choice. I am studying a general engineering course, but soon I will have to decide which course I want to do next year. Right now it's between

"Computer, Communications and Computer Engineering" and "Mechanical Engineering"

I love programming and find computers fascinating but I find the problems in mechanics very intuitive and I like mechanics.

Can anyone help me with some information on these two specialities? Any pros/cons?
3 posts omitted. Click View Thread to read.
Jenny Smallson - Sun, 13 Jan 2013 06:38:49 EST Pjytneps No.5319 Reply
Uh..mechatronics ?
Ebenezer Ciffingfuck - Sun, 31 Mar 2013 22:28:24 EST WGWITgF+ No.5540 Reply
well im studying mechatronic engineering. its pretty badass. try that.

Self-Review questions.

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- Sat, 30 Mar 2013 00:54:38 EST N2gcVF14 No.5532
File: 1364619278631.jpg -(34830B / 34.01KB, 310x419) Thumbnail displayed, click image for full size. Self-Review questions.
Does anyone know of a database of self review questions for different subjects?

Self study here, reading a book on electricity. I was making good progress on the book, until about the middle when it got into AC and complex-circuit analysis. The book only gives you about 10 questions at the end of a chapter, with no answers to check.

Pic related, the book I'm reading.

what do?

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- Sun, 23 Dec 2012 11:57:00 EST Jr33UkvF No.5244
File: 1356281820846.jpg -(23587B / 23.03KB, 429x410) Thumbnail displayed, click image for full size. what do?
Hello tesla, I live in holland and, if all goes well I will finish my study of mechanical/metal engineering this year. but I want to get a bachelor or masters degree in the direction of engineering/design/innovation/environment/durability/eco friendly stuff. Does anyone on here do a study like that? and how`s it called and where do you follow it? I`m willing to leave holland for my study if I can find one.
please enlighten me with your knowledge /tesla/
2 posts omitted. Click View Thread to read.
Thomas Blanningson - Mon, 25 Mar 2013 16:21:36 EST Jr33UkvF No.5518 Reply
>lurk /tesla/ after a while
>hey I know this thread
>oh wait I`m OP

anyway, I have decided to settle with Industrial Product Design (Industrieel Product Ontwerp in dutch), an engineering major and will do my minor on sustainable design. really looking forward to it!
now lets just hope I`ve passed my exams
Isabella Fendlebot - Tue, 26 Mar 2013 18:57:46 EST rL4bNMYM No.5523 Reply

Haha, same here.

I still approve of maritime engineering.

Or failing that, maritime officer.

To build.... or not to build..??

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- Wed, 28 Nov 2012 20:13:52 EST YJYWoo8g No.5168
File: 1354151632932.jpg -(11762B / 11.49KB, 255x198) Thumbnail displayed, click image for full size. To build.... or not to build..??
Hey /tesla/

wondering if any of you guys could point me in the direction for further reading into engineering my own sound system..... or do think it is too ambitious to attempt such a feet as I have done nothing of this nature before??

Graham Feddlechon - Wed, 28 Nov 2012 23:08:43 EST GX8aNZRo No.5169 Reply
Here are some circuit diagrams that are related to this.


Building your own speaker boxes would be fairly easy, but it's probably easier to just buy those, the amplifier will be enough work as it is.
Thomas Blanningson - Mon, 25 Mar 2013 16:31:47 EST Jr33UkvF No.5519 Reply
depends on what exactly you want to do, if you just want to build speaker boxes for your sounds system then I reccomend you take the right speakers with them. everyone on the internet says it, though I have not ever seen an argument for or against it.
here are some sites for speaker building (the first two are in dutch but I fthink you`ll be smart enough to figure out the designs):

and for the love of god, tell me you`re going to make a free party system in europe.


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- Wed, 13 Feb 2013 01:25:44 EST 9z6+JHTP No.5405
File: 1360736744032.jpg -(22643B / 22.11KB, 350x274) Thumbnail displayed, click image for full size. Trompe
This is a Trompe.
it can make a virtually inexhaustible supply of free compressed air

This system could eliminate the dependancy on oil (that's why it's so unheard of). It is the best form of renewable energy and badly needs development and publicity.

Just planting seeds...
9 posts and 2 images omitted. Click View Thread to read.
Shit Brookshaw - Wed, 27 Feb 2013 21:36:40 EST buTeoEHV No.5454 Reply
Yeah that's why I used the descriptor "microbial" in front of it..
Augustus Gupperkeck - Thu, 21 Mar 2013 20:31:07 EST 3EWmJhWK No.5507 Reply
What if we get overdependant on oxigen?

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