Leave these fields empty (spam trap):
You can leave this blank to post anonymously, or you can create a Tripcode by using the float Name#Password
A subject is required when posting a new thread
[*]Italic Text[/*]
[**]Bold Text[/**]
[~]Taimapedia Article[/~]
[%]Spoiler Text[/%]
>Highlight/Quote Text
[pre]Preformatted & Monospace text[/pre]
1. Numbered lists become ordered lists
* Bulleted lists become unordered lists


We're recovering from a major server loss and are restoring backups as we gain access to them. Don't mind the odd time warp. Warn us in the future.

shocking by Phoebe Neckleham - Tue, 04 Mar 2014 20:50:40 EST ID:UD9Q5Q+J No.6187 Ignore Report Reply Quick Reply
File: 1393984240251.jpg -(19979B / 19.51KB, 348x310) Thumbnail displayed, click image for full size. 19979
What's the highest voltage you've been shocked with, /tesla/?

ESD doesn't count
13 posts and 2 images omitted. Click Reply to view.
Faggy Dittingfield - Mon, 28 Apr 2014 17:02:36 EST ID:YMcsWEks No.6286 Ignore Report Quick Reply

I tried pic related once. I got shocked, but the power cut out immediately afterward. I don't recommend it.
Henry Dingerridge - Thu, 01 May 2014 21:13:28 EST ID:FMSlzPfk No.6289 Ignore Report Quick Reply
Lucky you got RCDs son. Short to earth and within 300ms that shock is over
Phoebe Blytheforth - Fri, 02 May 2014 04:05:01 EST ID:0hmA6MET No.6290 Ignore Report Quick Reply
1399017901152.jpg -(528069B / 515.69KB, 2708x1985) Thumbnail displayed, click image for full size.
I've touched a hot wire twice, both times had some insulation though, so I cannot be sure how much voltage I've been exposed to.

I have an abnormal blood type though, ad now I shock people when I touch them, but it never shocks me, and sometimes I hold a charge like a resistor, it is quite strange.....
Cornelius Sidgepuck - Fri, 02 May 2014 23:22:50 EST ID:01krkNKo No.6292 Ignore Report Quick Reply
I think you mean a capacitor, but I know what you mean. It's easy to see how people can build up different amounts of static charge, though. People have different skin types and some are more oily or sweaty than others.

Consider how dialectric insulators and capacitors work. The larger a capacitor is, the more energy it takes to charge up to a high voltage. Think about filling up a kiddie pool, vs. an olympic sized swimming pool. Conductive materials like metal don't build up high voltage static charge very fast because the charge gets quickly distributed over a larger area. Many insulative materials like plastic and styrofoam build up higher voltages because insulators have a very low capacitance and high resistance, so the charge can't dissipate through the material as easily. Sweaty, salty skin is very conductive compared to dry skin, so the dry person would build up higher static charges.
Augustus Sinningdale - Mon, 02 Jun 2014 13:31:42 EST ID:x6XNTpIN No.6336 Ignore Report Quick Reply
what he said was a copypasta

Geoengineering/Chemtrails by Richard T.Ickla - Sun, 01 Jun 2014 00:19:44 EST ID:VzcGbFxW No.6333 Locked Ignore Report Reply Quick Reply
File: 1401596384438.jpg -(65101B / 63.58KB, 426x640) Thumbnail displayed, click image for full size. 65101
Dear /tesla/

I'm a normal /b/ and /weed/ visitor but I come to you in hopes to try to understand a real concern of mine that if is honestly being covered up I will have to say there is no hope for our country once the long term effects are noticed.

Have any of you heard of Geoengineering or chemtrials. I recently viewed a video of a presentation about the topic. It tells of how the government has been spraying aluminum nano-particles into the upper atmosphere. It is said it is to help reduce carbon emissions by essentially (real layman's terms here and this is my mental visualization of it) using the nano-particals as tin foil to encompass the upper atmosphere and have the sun "bake" off the greenhouse gases. They say it is causing droughts in places like CA and other odd things that could actually be as bad if not worse than global warming (although different from the side effects of global warming). The concept seems completely half baked and horrible to begin with. They continue on with how scientists are activity trying to get the word out and are shutdown. When u Google the topic the first site is a Wikipedia page of how it is a conspiracy. They say they attempt to change it just to "theory" but it continually gets changed back. The actual site for the speakers community is http://www.geoengineeringwatch.org

The video I saw kinda looses me when they go into radio waves controlling the weather through this but it does seem completely ridiculous that they believe something like this would help. There are patents taken out that are accessible by the public that show people have at least thought of this plan and want to see it enacted.
My question is has anyone else heard of this?
Are there more credible sources that this is happening?
And can we at least sue for introducing aluminum nano-particles in the air?
(PS. Nano-particles refers to the size of the particles, not that they are robotic in anyway..... I hope..)

Pic unrelated (if dogs could text)
Thread has been locked
Thread was locked by: Synthetic
Reason: /tinfoil/
Clara Hackleman - Sun, 01 Jun 2014 13:57:45 EST ID:P1FecDgQ No.6334 Ignore Report Quick Reply
1401645465257.jpg -(129608B / 126.57KB, 1024x768) Thumbnail displayed, click image for full size.
OP, you might feel more at home in /tinfoil/. That's really all I can bring myself to say. Good luck and stay safe.

Using a cordless grinder inappropriately for fun and profit. by Shitting Monkinlidging - Fri, 16 May 2014 20:34:57 EST ID:0vSGJCQr No.6314 Ignore Report Reply Quick Reply
File: 1400286897564.jpg -(66969B / 65.40KB, 426x426) Thumbnail displayed, click image for full size. 66969
Remember those little wind-up toys you had as a kid? The ones that had a sandpaper disc and flint and would shoot sparks?

I want to make one. But on a larger scale, and with the possibility of an immense amount of damage should it go wrong. Why? Because I want to.

The end project will be more like an RC controlled toy and a Type 1 from Screamers.

For the sparking bit, I figured it would be most effective to use a cordless cut off tool. The discs are cheap and durable, and I could simply have a servo drop a chunk of steel rod onto it like a record needle. Big sparks...tons of fun.

I can find tons of cordless cut off tools. But they come sans batteries. The battery packs run a minimum of $50 and I would also need a charger. I can get get a LI-PO battery pack from Hobby King that has 75% more amp hours for $20.00 and any charger would be far more versatile than some proprietary thing.

Here is my question - Do I NEED the OEM battery pack on these things? I can easily see the companies that make these tools throwing in a little ATTiny chip for $1.20 that would ensure you can't use non-mfg batteries. I would like to avoid that kind of shit, but can't find much data out there on this. Ideally I would buy the cutoff tool, break it down to just the parts I need and wire it into one of these -


Any info would be appreciated as I figure out this beast.
Hamilton Wemmlechotch - Thu, 29 May 2014 16:36:05 EST ID:P1FecDgQ No.6331 Ignore Report Quick Reply
1401395765544.gif -(1464530B / 1.40MB, 400x259) Thumbnail displayed, click image for full size.
While I don't exactly understand the function of your project. I do understand the desire to create your very own machine. It's honestly an amazing process and it can be a beautiful thing to breathe life and form into shapeless metal.

While I have no experience with the battery pack in question (as I prefer internal combustion as a means of propulsion/power) the reviews on it seem quite positive, and at that price I don't really see any harm in giving it an honest shot. If it doesn't work, then you have your answer. And it will give you the knowledge you need for any future projects that might require a battery pack.

Anyway, best of luck with your creation! remember to construct it with care, and I'm sure it will perform admirably by scaring the living bejesus out of children/household pets/pyrophobes.

Have you thought about possibly using a gigantic spiral torsion spring? like an over-sized version of the one in your pic? of course then it wouldn't be able to be Radio Controlled.
Jack Seffingstone - Fri, 30 May 2014 21:00:33 EST ID:0vSGJCQr No.6332 Ignore Report Quick Reply
>Have you thought about possibly using a gigantic spiral torsion spring? like an over-sized version of the one in your pic? of course then it wouldn't be able to be Radio Controlled.

I did. And I may do that at some point, but however I do this, there needs to be some control since just letting this thing go would be like pumping a wolverine full of meth and letting it loose. I may go with that on another model and then have a small battery pack that allows for control. Gotta be careful though.

Toaster by Sophie Wonderforth - Sat, 17 May 2014 21:37:20 EST ID:R8ES437o No.6316 Ignore Report Reply Quick Reply
File: 1400377040290.gif -(1881632B / 1.79MB, 231x200) Thumbnail displayed, click image for full size. 1881632
I need to fix my toaster, how much would it cost to hire an engineer to come and fix it for me, is it difficult and do engineers like tea with milk or not?
Polly Ganningstock - Sun, 18 May 2014 14:01:10 EST ID:0vSGJCQr No.6318 Ignore Report Quick Reply
Reuben Hellercocke - Sun, 25 May 2014 12:34:44 EST ID:WCjzl674 No.6328 Ignore Report Quick Reply
forget about an engineer, you need a toaster technician.

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


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

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
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
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:

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.
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.
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
1398961018149.png -(268529B / 262.24KB, 1158x1191) Thumbnail displayed, click image for full size.
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
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
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
1398278880724.png -(386384B / 377.33KB, 481x420) Thumbnail displayed, click image for full size.
Molly Bubbernedge - Wed, 23 Apr 2014 19:04:54 EST ID:LNG8f7Rs No.6276 Ignore Report Quick Reply
1398294294169.gif -(593564B / 579.65KB, 480x360) Thumbnail displayed, click image for full size.
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
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
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
>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
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
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
ur mom feels rough when im riding her

<<Last Pages Next>>
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Report Post
Please be descriptive with report notes,
this helps staff resolve issues quicker.