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Standards by Beatrice Wellermin - Wed, 14 May 2014 20:14:05 EST ID:CKZoWqYh No.6311 Ignore Report Reply Quick Reply
File: 1400112845660.jpg -(49023B / 47.87KB, 276x276) Thumbnail displayed, click image for full size. 49023
Where to get standards? I'm not going to pay these ridiculous amounts for them.
>>
Wesley Blackshaw - Wed, 14 May 2014 20:38:06 EST ID:sgRmu6cC No.6312 Ignore Report Quick Reply
>>6311
http://libgen.org/scimag/index.php

maybe


Shelves by Angus Gupperfuck - Fri, 02 May 2014 10:15:43 EST ID:9XByXaAP No.6291 Ignore Report Reply Quick Reply
File: 1399040143242.jpg -(7964B / 7.78KB, 306x185) Thumbnail displayed, click image for full size. 7964
Guys

I want to put up some shelves, shaped like in the pic. Where should I put the brackets for maximum support? I got 3 per shelf. The points of the red triangle is my guesstimate. Good?
>>
Doris Brubbleson - Mon, 12 May 2014 11:01:42 EST ID:lqGuA0m0 No.6307 Ignore Report Quick Reply
If that's a wooden shelf for someones bedroom then that's perfectly fine.

If you plan on standing on it though I would suggest a highly durable frame in a similar position of your red triangle.
Then again if it was industrial I would probably suggest just using the frame and fuck off the black area.


stored energy circuit by Eliza Beckleshaw - Thu, 08 May 2014 22:07:03 EST ID:2POYse6P No.6296 Ignore Report Reply Quick Reply
File: 1399601223055.jpg -(403748B / 394.29KB, 2592x1952) Thumbnail displayed, click image for full size. 403748
goal: use 5 vdc @ 500 mA from a usb port to charge a largeish capacitor, and when needed deliver as many amps as possible at 1.25 vdc. when the cap drains it would output full usb port current at 1.25vdc (~2 amps?).

i'm thinking about this two ways:

  1. usb 5vdc -> cap -> voltage regulator(s) 1.25vdc -> out
  2. usb 5vdc -> voltage regulator 1.25vdc -> cap -> out

are these functionally equivalent or is there a preferable arrangement (or something else entirely)? yes this is intended as a usb powered AA battery replacement.
>>
Matilda Blatherhall - Fri, 09 May 2014 00:52:21 EST ID:01krkNKo No.6297 Ignore Report Quick Reply
The regulator should have a cap on both the input and output anyway (read the datasheet). But the output cap is what supplies "as many amps as possible" to the load, for a very short time at least, and it protects the regulator by filtering the current spikes out. Ideally it would be

5vdc -> cap -> 1.5V regulator -> current limiter (if not built into the regulator) -> cap -> out
>>
Thomas Funningfield - Fri, 09 May 2014 20:54:36 EST ID:2POYse6P No.6300 Ignore Report Quick Reply
>>6297
thanks for the reply.

charging the cap with 5v will require a cap rated for 7.5v or better, which are more expensive than a 2.7v rated cap (charged by pre-regulated 1.2v).

also i would need to somehow equally split the 5v cap voltage to (three?) voltage regulators, as each is only capable of 1.5 amps.

current limiting can be done with another lm317 but i havent looked into it/built it yet.
>>
Sidney Humblewater - Sat, 10 May 2014 12:13:23 EST ID:01krkNKo No.6304 Ignore Report Quick Reply
>>6300
You lost me here. You just need a ceramic 0.1uF at the input. These types of caps are cheap regardless of the voltage rating. Here's a 50V one that costs 16 cents:
http://www.mouser.com/ProductDetail/AVX/SR215C104KAA/?qs=sGAEpiMZZMt3KoXD5rJ2NzY%2fNzACikyQUu7ggGOJe%2fA%3d

And if 1.5 Amps isn't enough, why not find a single regulator that can output more? But you're not going to get more current than that from the USB port anyway.


Material Science Engineering by John Dirringweck - Fri, 18 Apr 2014 18:51:59 EST ID:bPdtWw+Z No.6261 Ignore Report Reply Quick Reply
File: 1397861519691.jpg -(41251B / 40.28KB, 607x277) Thumbnail displayed, click image for full size. 41251
Hello /tesla/,
So I just sent my SIR to UC Irvine. I'm going to be an anteater in the fall! I got $40,000 per year in aid and grants so I'll have minimal debt. I got accepted under polisci because my freshman grades kind of screwed me over. But I got an email yesterday and they told me I could appeal my decision to the school of engineering, which I did. I just had to inform them of my last semester grades and any science-related experiment/project I've done. Last semester I took AVID senior seminar, AP Microeconomics, AP Calc A/B, AP Physics, and AP English lit and Comp. Grades were A, B, A, B, A respectively
The email also said that they have space in Material Science Engineering and maybe in Aerospace engineering (my preferred choice), but I didn't want to risk not getting in so I chose MSE.
The email also said that they have space in Material Science Engineering and maybe in Aerospace engineering (my preferred choice), but I didn't want to risk not getting in so I chose MSE.
Was this a good choice? Any of you doing MSE? What's it like?
>>
Eliza Nangerway - Thu, 24 Apr 2014 16:04:20 EST ID:9+I+k5VX No.6281 Ignore Report Quick Reply
1398369860266.jpg -(165405B / 161.53KB, 1024x768) Thumbnail displayed, click image for full size.
>>6261
Congratulations on getting accepted into the engineering programs,
I'm happy to hear that you are doing so well in your classes.


Most fields of engineering overlap in the early stages, so you will have to decide whether MSE is for you or if AE is more your forte. Material sciences is working with things like ceramics, plastics, etc. while aerospace would be more inclined to things like aerodynamics, statics and forces.

in the set of engineering, the skill sets these sub fields require are that you must learn physics, Integral and differential calculus , statics, kinematics, hydraulics, heat, strength, and how to machine parts.
how you use these skills will be dependent on your actual major, but more or less its inter-connected in the non-specialized classes.

as for whether its a good choice, that's up to you if you like the feel of the work keep going and don't give up. ALSO i would suggest getting a girlfriend or boyfriend before you lose contact with the human race; get some friends from class and hang out and study as a group.
these tests are hard, and the concepts can be complex.

you are lucky to have FA im working and studying full time.
Comment too long. Click here to view the full text.
>>
Priscilla Smallford - Sun, 27 Apr 2014 05:08:54 EST ID:bPdtWw+Z No.6285 Ignore Report Quick Reply
1398589734611.png -(119093B / 116.30KB, 1080x782) Thumbnail displayed, click image for full size.
>>6281
I got in! Thanks for the advice!
>>
Basil Clammleworth - Thu, 01 May 2014 12:16:58 EST ID:wL5glGPd No.6288 Ignore Report Quick Reply
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>>6285
Welcome to the UC system. Enjoy your stay, and good luck with Engineering.


HALP by George Babbleville - Wed, 30 Apr 2014 06:23:06 EST ID:vSTp3Yjx No.6287 Ignore Report Reply Quick Reply
File: 1398853386566.jpg -(40432B / 39.48KB, 500x384) Thumbnail displayed, click image for full size. 40432
anybody know of any good gcode simulators?

thanks /tesla/


Tin Can Predicament by Cyril Honeyridge - Sun, 20 Apr 2014 13:51:37 EST ID:5gD9lQi4 No.6264 Ignore Report Reply Quick Reply
File: 1398016297652.png -(45544B / 44.48KB, 1103x1305) Thumbnail displayed, click image for full size. 45544
Heyo, /tesla/

I got a quick problem that needs solving.

I have a tin can I need overlapped onto the end of the other, such that 2 holes line up. I did my best to show this in sketchup (see picture).
I'm thinking I should cut about an inch at 8 points equidistant from each other around the rim of the upper can and fold the tabs alternating in and out, but I need a second opinion from some legit engineers.

Lemme know what you think.
5 posts omitted. Click Reply to view.
>>
Fuck Crubbertadge - Tue, 22 Apr 2014 09:57:40 EST ID:RVngPBEo No.6270 Ignore Report Quick Reply
>>6268
For a few minutes, until the aluminum starts to overheat, expand and cause catastrophic failure.

The trick is to get the shaft turning at a high enough speed so that the air flow is maximized before adding any fuel to burn. That way, the exhaust turbines won't seize up and melt everything.
>>
Jack Turveyspear - Tue, 22 Apr 2014 10:09:36 EST ID:LNG8f7Rs No.6271 Ignore Report Quick Reply
>>6270
I imagined this is in soda cans. I just thought the suction from the intake would be enough to warp it along with the heat and force coming from the back
>>
Priscilla Grandlock - Wed, 23 Apr 2014 14:48:00 EST ID:RVngPBEo No.6275 Ignore Report Quick Reply
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>>6271
>>
Molly Bubbernedge - Wed, 23 Apr 2014 19:04:54 EST ID:LNG8f7Rs No.6276 Ignore Report Quick Reply
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>>6275
I told you I was a dip shit
>>
Eugene Nengerdin - Sat, 26 Apr 2014 22:02:57 EST ID:RVngPBEo No.6284 Ignore Report Quick Reply
>>6264
OK, scratch that.

I need one can to fit ENTIRELY over the other. None of that alternating in/out tab nonsense. Short of cutting down the entire length of the outer can to fit around the inner can, what can I do to make this happen?


3d Printing by Nicholas Shittingfield - Tue, 04 Mar 2014 18:06:15 EST ID:kWAgYbio No.6184 Ignore Report Reply Quick Reply
File: 1393974375035.jpg -(2230224B / 2.13MB, 3845x2889) Thumbnail displayed, click image for full size. 2230224
Hey /TESLA/, I recently came across an invention that involves reinventing the basic metal screw.
I've been looking into 3d printers so I don't have to take my idea to China. Though I am filing a patent soon and I may be forced to outsource it.
I'm just looking for experts on the subject, maybe direct me to the cheapest, most practical personal-use 3d printer that only produces small stuff.
I'm searching, but so far all I'm finding are these massive rigs for making guns and engines lol
5 posts omitted. Click Reply to view.
>>
Archie Clockleshit - Thu, 13 Mar 2014 19:26:06 EST ID:bgxxcMnM No.6214 Ignore Report Quick Reply
1394753166066.jpg -(579688B / 566.10KB, 1280x1280) Thumbnail displayed, click image for full size.
Well this will depend on the type of material you intend to use, as each material has a benefit. In my experience, solid models of parts are best presented by FDM (Fused deposition modeling). It melts a small filament of plasting as it prints in 3D, thus creating a model that is basically solid plastic. In this case, Fortus makes fantastic 3D printers for FDM processes.

Another great part modeling material is with Objet printers. They utilize a light cure resin that is somewhat brittle, but comes in many specific variations. The limitation with this is that the model material is encased in a gel of support material that needs to be thoroughly (see painstakingly) removed.

Regardless of choice, it will run you a couple grand for a good machine with which to to solid model prototyping.

Pic is of powder modeling. It uses a sugar based liquid through an inkjet head to solidify a baking soda like powder. It suck don't use it ever, weak parts and a huge mess.
>>
Fanny Pindertut - Sun, 16 Mar 2014 02:28:51 EST ID:kWAgYbio No.6220 Ignore Report Quick Reply
>>6214
Ya that looks like a bunch of preserved sandcastles lol. I believe the technique for my first permanent prototype will be of stainless steel by means of FDM.
>>
Charlotte Sunkinpack - Mon, 24 Mar 2014 04:48:18 EST ID:nSYRePSf No.6228 Ignore Report Quick Reply
>>6184
>reinventing the basic metal screw.

Self Sealing Stembolts?
>>
dave !N5MvbCntdE - Sat, 19 Apr 2014 14:50:17 EST ID:WCjzl674 No.6263 Ignore Report Quick Reply
I'm thinking of getting a reprap kit to make my own plastic parts, and maybe consumer goods. they're getting cheaper than photo printers which is cool.
Anybody have advice for a 3D printing n00b?
>>
Oliver Tillingworth - Fri, 25 Apr 2014 04:13:12 EST ID:kWAgYbio No.6282 Ignore Report Quick Reply
>>6228
Nope, it has more has to do with solving a long dismissed problem on guitars.


Stairclimber wheels by Samuel Hunderwidge - Sun, 19 May 2013 11:31:09 EST ID:t6Yu9g/A No.5663 Ignore Report Reply Quick Reply
File: 1368977469052.jpg -(110736B / 108.14KB, 1000x598) Thumbnail displayed, click image for full size. 110736
So how come these never caught on?
2 posts omitted. Click Reply to view.
>>
Isabella Pickshit - Fri, 24 May 2013 08:18:08 EST ID:61FQy/W4 No.5692 Ignore Report Quick Reply
why dont i just get a bigger wheer that will climb over it either way?
>>
Charles Benderchit - Sat, 25 May 2013 09:20:35 EST ID:Hp4T43CN No.5694 Ignore Report Quick Reply
>>5692
The triwheel has a few good tricks unique to itself.
It absobs an impact by rotating, even though the Landmaster had no suspension the ride was smooth even at high speed over rough terrain, check the videos, they were really moving, but every time they hit a rock or hole the triplet just swings over.
It can climb by locking the wheels and running power to the triple wheel brace. Like that it moves like it has legs and will clear obstacles that would stop even a wheel that size.
If a tyre blows, you can just roll it over and lock the frame.
You can run the wheels AND triframe, and use it as a paddlewheel.
>>
John Brookspear - Thu, 03 Apr 2014 16:03:14 EST ID:MOd48Kn3 No.6239 Ignore Report Quick Reply
It looks like it would feel rough to have the triwheel rotate while riding in it.
>>
Barnaby Blenkinchitch - Sat, 05 Apr 2014 12:44:10 EST ID:8GdYYP4I No.6240 Ignore Report Quick Reply
fewer moving parts?
>>
Nathaniel Buncocke - Fri, 18 Apr 2014 17:50:39 EST ID:xZgv+GY1 No.6258 Ignore Report Quick Reply
>>6239
ur mom feels rough when im riding her


dumb and bad device idea by Oliver Fallermork - Mon, 14 Apr 2014 10:31:01 EST ID:7zEswIka No.6251 Ignore Report Reply Quick Reply
File: 1397485861729.jpg -(61737B / 60.29KB, 700x465) Thumbnail displayed, click image for full size. 61737
DRM to the ears. earbuds that take an encrypted digital signal to a digital circuit in each earbud, which then decrypts it, and then energizes a driver - with almost no wire - attached directly to the center of the IC. securely give audio to humans only.

:x i think it would be pretty cool though. perhaps if music generated more revenue, the music released would be much better. none of this good faith enough people are buying it bullshit
>>
Oliver Fallermork - Mon, 14 Apr 2014 10:32:22 EST ID:7zEswIka No.6252 Ignore Report Quick Reply
plus you could radio tracks before the album comes out


Pilot Plant Real Book by Edward Disslefuck - Wed, 09 Apr 2014 00:53:09 EST ID:UC+qXdSi No.6241 Ignore Report Reply Quick Reply
File: 1397019189094.png -(234926B / 229.42KB, 1680x1050) Thumbnail displayed, click image for full size. 234926
Does anybody have a pdf of it?


Mimic a Remote's IR Code by Faggy Febberput - Thu, 27 Mar 2014 01:47:11 EST ID:FABnkK5n No.6232 Ignore Report Reply Quick Reply
File: 1395899231735.jpg -(144845B / 141.45KB, 720x540) Thumbnail displayed, click image for full size. 144845
My goal is to make a little circuit with an IR LED that can function as the original remote. So I need to somehow "learn" that original code from the original remote and program that into the circuit.

Is this possible? I know that a hacked PSP can do it.
1 posts omitted. Click Reply to view.
>>
Jenny Clammerfork - Thu, 27 Mar 2014 21:32:21 EST ID:FABnkK5n No.6234 Ignore Report Quick Reply
How do I record each code and assign it manually?
>>
John Blenderlune - Fri, 28 Mar 2014 22:44:02 EST ID:vXg79lPA No.6235 Ignore Report Quick Reply
>>6234
You need a microcontroller and an IR sensor. And an IR LED. And a power supply. And some very minor signal conditioning.
>>
Frederick Depperhall - Sun, 30 Mar 2014 01:41:43 EST ID:xZgv+GY1 No.6236 Ignore Report Quick Reply
>>6234
do you have the original remote?

if you do you can press the button and receive it in the other end with a circuit

the circuit is kinda involved, but it's easy if you're willing to learn

basically the signal is gonna come in as a square wave and you're going to have to grab that bit by bit, and turn in into a word, how ever long it might be.

i can't imagine the remote outputting more than 16 bits of information per button but i could be wrong, testing something like that might require an oscilloscope, but you might be able to find one at a hackerspace or something

to turn it bit by bit to a word you need something that's called sipo shift register which stands for serial in parallel out shift register. you might need a clock for one of those as well, and the clock speed might need to match the speed of the remote output though if you're clever you can get by that with a microcontroller or some clever circuitry but i'm not getting into that

and the output of that goes into a data buffer
Comment too long. Click here to view the full text.
>>
Basil Dezzletig - Mon, 31 Mar 2014 08:38:40 EST ID:+llB3/RB No.6237 Ignore Report Quick Reply
1396269520444.jpg -(197292B / 192.67KB, 564x423) Thumbnail displayed, click image for full size.
http://www.lirc.org/

There is a lot of various circuits
Simplest build is like 5 parts
Software will take care of the rest
>>
Sidney Clenkinweg - Tue, 01 Apr 2014 13:51:36 EST ID:DPsZhwc3 No.6238 Ignore Report Quick Reply
>>6236
Well I give up.
Thanks anyway though!


Chinese 60 years behind the space race by Hedda Creffingdock - Mon, 10 Feb 2014 09:18:46 EST ID:9tRAlAIb No.6126 Ignore Report Reply Quick Reply
File: 1392041926891.jpg -(282326B / 275.71KB, 752x1063) Thumbnail displayed, click image for full size. 282326
Why did the Jade Rabbit moon rover fail /tesla/ ;_;

http://www.independent.co.uk/life-style/gadgets-and-tech/goodnight-earth-goodnight-humanity-chinas-jade-rabbit-rover-tweets-its-own-death-9103864.html

Trap card: Most of the Chinese engineers who developed it would have got theirs Masters and Docotrates from American Universities. I'm looking at you, Cal-Tech. and UCLA
>>
Hedda Creffingdock - Mon, 10 Feb 2014 09:20:18 EST ID:9tRAlAIb No.6127 Ignore Report Quick Reply
1392042018891.jpg -(6456B / 6.30KB, 292x172) Thumbnail displayed, click image for full size.
>>6126

*their Masters and Doctorates in Engineering from American Universities
>>
Archie Buzzman - Thu, 20 Feb 2014 20:29:42 EST ID:Oq2QBNL1 No.6152 Ignore Report Quick Reply
why would they make a robot, powered by sun light, that can not turn on when its solar panels are collecting sunlight?
>>
Graham Honeyman - Fri, 21 Mar 2014 22:38:15 EST ID:nSEO9O+z No.6222 Ignore Report Quick Reply
>During this time temperatures plunge to -170 degrees Celsius (-274 degrees Fahrenheit) and Jade Rabbit – which is powered by solar panels – must enter into a hibernation state to preserve its core systems.
Why the fuck would extreme cold hurt it? Preserve it's core systems? The dragon that powers it? Can't it boot up again after gathering energy after the lunar night?

>"If this journey must come to an early end, I am not afraid. Whether or not the repairs are successful, I believe even my malfunctions will provide my masters with valuable information and experience.
Yeah, maybe not to write half assed buggy software next time? Just making guesses...
>>
Augustus Dummermetch - Fri, 21 Mar 2014 23:04:23 EST ID:5IdDtd2q No.6223 Ignore Report Quick Reply
>>6222
space grade dragons and electronics alike are usually just not made to resist those low temperatures. or should i say, resist very low temps too good? get it?
>>
Hugh Chosslefield - Tue, 25 Mar 2014 11:01:01 EST ID:TLtnKWTx No.6231 Ignore Report Quick Reply
I feel bad for the midged inside


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