Page 9 of 64

Posted: Wed May 23, 2007 7:43 am UTC
by Froodulous
I'm going to introduce myself here as well as the last intro thread, just for the sake of it.

hello, British, 17, taking AS-levels, all the sciences, maths and further maths.

Also, I play the piano, saxaphone and drums.

I read a fairly large number of webcomics (31 read on a regular basis and 2 more for which I am planning on reading through the archives)

Posted: Wed May 23, 2007 7:44 am UTC
by Spaz Funbag
that is quite nice, too!

SCR=Silicon-controlled Rectifier?
Where'd you get those?

Aw man, you people all have such cool things to use at your disposal!

But how does it actually work? When you "push the button", the scr's close the circuit between the caps and the coil, creating a rapid increase in current, inducing a high magnetic flow in the coil, and by lenz the object inside is catapulted outside?

Posted: Wed May 23, 2007 8:08 am UTC
by Cephalus
Spaz Funbag wrote:that is quite nice, too!

SCR=Silicon-controlled Rectifier?
Where'd you get those?

Aw man, you people all have such cool things to use at your disposal!

But how does it actually work? When you "push the button", the scr's close the circuit between the caps and the coil, creating a rapid increase in current, inducing a high magnetic flow in the coil, and by lenz the object inside is catapulted outside?


We got the SCR's from my friend's boss, who had them laying around - he works for a small company making test machines. The capacitors we ordered off of Ebay, and we borrowed the power supplys from our physics lab at school. The various switches and e-stops we had around. It's on a board of some kind of compressed plastic that does not conduct, forget what it's called.

We turn a switch to the left, which opens the circuit from the power supply to the capacitors. Switch it back to the middle position, and the capacitors are isolated, and then to the right which puts them in the circuit with the coil. Press the button above the 3-way switch, and that closes the circuit with the capacitors and the coil. Press the E-stop, and it discharged the capacitors through the ground (via the third SCR).

Basically, it works by sending a huge spike of power through the coil, propelling the metal object inside. We were dealing with too much power to feel safe using a physical switch, which is why we used the SCR's for all the switching. We didn't have much time to get an effecient coil, but the bb's we were shooting out with it were penetrating an aluminum soda can.

Posted: Wed May 23, 2007 9:06 am UTC
by Spaz Funbag
what do you mean "too much power to use a physical switch"?

Posted: Wed May 23, 2007 9:15 am UTC
by Cephalus
Spaz Funbag wrote:what do you mean "too much power to use a physical switch"?


The main concern was power loss. There is little sense in getting huge capacitors and then losing 30% of your power through loss at the switch. With a SCR, there was a lot less resistance. When you turn on a light, you aren't concerned with losing a little bit of energy there, but with the gauss gun it's all about the surge of energy.

Posted: Wed May 23, 2007 9:29 am UTC
by Spaz Funbag
Well, i thought of something like this
See more here
That site is hot!

Posted: Wed May 23, 2007 9:37 am UTC
by Cephalus
Spaz Funbag wrote:Well, i thought of something like this
See more here
That site is hot!


If you look at his capacitor bank, you will notice that he uses a SCR also. We were dealing with near the same amount of power - 18800 Microfarads vs 7200 for us (although we were charging them to 450V, which reduces that difference a bit)

We've had a railgun planned for a while, but since we go to school 300 miles apart, it will have to wait a bit.

Posted: Wed May 23, 2007 9:40 am UTC
by SpitValve
Froodulous wrote:hello, British, 17, taking ASS-levels, all the sciences, maths and further maths.


hehe


Anyway, for those who don't know me: I'm Dave, I'm 22 and I'm currently a Masters student doing simulations in condensed matter physics at Vic in Wellington, New Zealand, and in September I'm heading over to Halifax in Canader to do a PhD in (computational) astronomy.

I also play trombone, guitar and Halo.

Posted: Wed May 23, 2007 10:45 am UTC
by Spaz Funbag
SpitValve wrote:I also play trombone

Yeah! Trombone! You rock, man! Go trombonists!

SpitValve wrote:guitar

Even better! Yay for guitar-playing trombonists!

SpitValve wrote:and Halo.

meh.

Posted: Wed May 23, 2007 11:28 am UTC
by Ren
Musicians for the win!

Also for all you Scrabble-y people: I have memorized all the two-letter words (including the two new ones: "za" and "qi"--no kidding), and am working on the three-letter ones, although there are a lot more of those...

*intimidation*

Posted: Wed May 23, 2007 12:16 pm UTC
by chrispy1
Ren wrote:Musicians for the win!

Also for all you Scrabble-y people: I have memorized all the two-letter words (including the two new ones: "za" and "qi"--no kidding), and am working on the three-letter ones, although there are a lot more of those...

*intimidation*


My secret weapon is the drug used in the Somali war similar to cocoa - green leafy plant that they chew....3 letters, and it saves my ass every time :D

Posted: Wed May 23, 2007 12:46 pm UTC
by McLurker
Belial wrote:Wait...fuck...you can trade kids for DOUGHNUTS?!!?!?!!!?!????

I need to rethink the whole childfree thing...


Is it wrong to want to knock someone up in order to trade the kid for a lifetime supply of doughnuts? Would I have to share the doughnuts? Would there be a custody battle over said doughnuts?

Posted: Wed May 23, 2007 12:50 pm UTC
by Radio Free Eurasia
Ren wrote:Musicians for the win!

Also for all you Scrabble-y people: I have memorized all the two-letter words (including the two new ones: "za" and "qi"--no kidding), and am working on the three-letter ones, although there are a lot more of those...

*intimidation*


Yes, but do you play defensively, memorizing what letters are available so that you can imagine what words your opponent will be able to play and stymie them accordingly?

I don't, because I play scrabble to write the funniest words, not the most point laden words.

Also, from post earlier, define "indie music" and specifically, vinyl. I couple years ago I found this absolutely diesel (to use the vernacular) record store in Princeton and I've been broke ever since.

Posted: Wed May 23, 2007 12:57 pm UTC
by McLurker
Radio Free Eurasia wrote:
Ren wrote:Musicians for the win!

Also for all you Scrabble-y people: I have memorized all the two-letter words (including the two new ones: "za" and "qi"--no kidding), and am working on the three-letter ones, although there are a lot more of those...

*intimidation*


Yes, but do you play defensively, memorizing what letters are available so that you can imagine what words your opponent will be able to play and stymie them accordingly?



No, becasue the true purpose of scrabble is to impress people with your vocabulary, right?

Posted: Wed May 23, 2007 1:07 pm UTC
by Radio Free Eurasia
McLurker wrote:
No, becasue the true purpose of scrabble is to impress people with your vocabulary, right?


I thought that was also the point of messageboards.

Posted: Wed May 23, 2007 1:14 pm UTC
by arbivark
Arbivark here, the arbitrary aardvark.
Not very good Webcomic

I'm an internet addict and was looking for another place to waste time.
Had something to say in a thread a few days ago but by the time i'd registered i lost the link was going to post.
Stuff about me? I am have some law degrees I don't use - writer's block, emotional problems, lack of competence... so i currently make a living renting my body to drug companies for medical experiments.
I useta be one of wil wheaton's minions
I've gotten a couple articles posted to slashdot recently. I have no life.
Started reading xkcd last year, but recently it gets mentioned everywhere
(if by everywhere one means say, boingboing, /.)
Qat: I has a qat.

Please have at least 10 posts before putting up links, especially that many.

Posted: Wed May 23, 2007 1:54 pm UTC
by McLurker
Radio Free Eurasia wrote:
McLurker wrote:
No, becasue the true purpose of scrabble is to impress people with your vocabulary, right?


I thought that was also the point of messageboards.


Which is why you find so many people online who play scrabble.

Posted: Wed May 23, 2007 2:45 pm UTC
by Radio Free Eurasia
McLurker wrote:Which is why you find so many people online who play scrabble.


Also, I've found that some of the people who devote themselves to scrabble are those who don't devote themselves, say, to joining fraternities and eschewing online exploits.

Posted: Wed May 23, 2007 4:36 pm UTC
by saibot834
Hello everyone :)

Hello, my name is... well you probably can see my name on the left of your screen, just beside my post. My name isn't interesting anyway. ;)

I'm an 17 years old guy from Germany (<-- that's why me English is that bad. Sorry!). My hobbies are sitting in front of the computer (yeah, maybe I should go bungee jumping), playing computer games (ut2004), writing Wikipedia articles or browse many hours through hundreds of articles (see this xkcd) and much more. xkcd and UF are my favorite comics. Beside computers, I'm interested in maths, cryptography and ethics.
I like metal music, I am a vegetarian and that's basically what I can tell about myself...

Greetings, saibot834

Posted: Wed May 23, 2007 4:45 pm UTC
by Ren
McLurker wrote:
Radio Free Eurasia wrote:
Ren wrote:Musicians for the win!

Also for all you Scrabble-y people: I have memorized all the two-letter words (including the two new ones: "za" and "qi"--no kidding), and am working on the three-letter ones, although there are a lot more of those...

*intimidation*


Yes, but do you play defensively, memorizing what letters are available so that you can imagine what words your opponent will be able to play and stymie them accordingly?



No, because the true purpose of scrabble is to impress people with your vocabulary, right?


The TRUE purpose of Scrabble is to get as many points as possible out of every turn. That has been my strategy: AGRESSIVE! My only defensive tactics are to not set up big pointers on triple-and-double words scores.

"Qat" is old news. Ever used "Faqir"? Best q-without-u word ever, because everyone's heard of it but no one expects it! Or "qi" works in blocks, too. That's why the two-letter words are so important, playing in-line with another word racks up points like nobody's business.

Posted: Wed May 23, 2007 5:06 pm UTC
by Spaz Funbag
I love the fact that more and more people from Germany are starting to show up!



*snicker* finally my evil plans are starting to show success *snicker*

Posted: Wed May 23, 2007 5:21 pm UTC
by LE4dGOLEM
Spaz Funbag wrote:*snicker* finally my evil plans are starting to show success *snicker*


Must not... Invoke Wrath of... Godwin's law...

Posted: Wed May 23, 2007 6:09 pm UTC
by McLurker
Must... not... quote from that Fawlty Towers episode...

Don't mention the war!
I mentioned it once, but I think I got away with it...

Posted: Wed May 23, 2007 6:36 pm UTC
by Radio Free Eurasia
Ren wrote:
The TRUE purpose of Scrabble is to get as many points as possible out of every turn. That has been my strategy: AGRESSIVE! My only defensive tactics are to not set up big pointers on triple-and-double words scores.

"Qat" is old news. Ever used "Faqir"? Best q-without-u word ever, because everyone's heard of it but no one expects it! Or "qi" works in blocks, too. That's why the two-letter words are so important, playing in-line with another word racks up points like nobody's business.


My defensive strategy is to write dirty words in my queue and then show them to the other players. While they're not paying attention, I then break out my bag of hidden letters I brought from home.

But I'm intrigued by the possibility of converting the Princeton offense to Scrabble.

Posted: Wed May 23, 2007 7:20 pm UTC
by Thunderbird4!
Froodulous wrote:... Also, I play the piano, saxaphone and drums. ...

Between your avatar and that line all I could think was "You can tune a piano but you can't tune a fish." :twisted:

Who am I ????

Posted: Wed May 23, 2007 7:22 pm UTC
by andor
I'm nearly a human, by industry standars, so this should work.

I've been made nearly 25 years back on Spain, so that explains my awful and full-of-grammar-issues english.

I have no studies, apart from highschool and some scientific imaging courses (IR, UV, high speed, thermal, astro, crime scene, and so on.. kind of funny).

I devote my time to computers, so I work as a Freelancer IT Manager for some companies.

I have also photography and music as my other hobbies.

I still live in my home city, Alcobendas, 10miles away of Madrid.

Have a nice day and be aware of the raptors...
:)

Posted: Wed May 23, 2007 7:24 pm UTC
by DonChubby
SpitValve wrote:
Froodulous wrote:hello, British, 17, taking ASS-levels, all the sciences, maths and further maths.


hehe

Strangely enough, I started giggling at this uncontrollably about an hour or two after I read it. :shock:

Posted: Wed May 23, 2007 7:51 pm UTC
by Spaz Funbag
how old are you? around 14/15? Well, then it is ok.

SpitValve, how old are you again? I can't believe someone like that is given the ability to edit posts (awaiting the obvious)

My, my, my...

Posted: Wed May 23, 2007 7:57 pm UTC
by liza
I'll disregard the fact that I did this not too long ago and reintroduce myself.

I'm Liza or Somnia.

I'm scholastically masochistic; regardless of the fact that I could have stopped my mathematical education a year ago I took Calculus, and I'm taking AP Bio even though I really have no need for it and kind of hate the subject.

When I do that whole university thing, I'll major in poli sci and minor in math (if I can) for no reason whatsoever. If I study anything else instead, it'll probably be neuroscience, just because it's so darn cool.

I play flute in band and guitar and piano very poorly.

I ski a lot.

I'm a vegetarian.

Ah, what else? I just got elected my NHS's treasurer, which is fairly cool, and I'm our Human Dignity Club (Gay-Straight Alliance with a different name)'s president.

Oh, and I have named every CASIO calculator I ever owned. And I hold super geeky parties where people get together just to watch Firefly or play Diplomacy.

And I do believe that is everything you need to know about me.

Posted: Wed May 23, 2007 7:59 pm UTC
by Spaz Funbag
wait - Firefly is geeky?

I thought that would be just "cultish" and maybe "insider-y"
Hm. Am I a geek by that definition?

Posted: Wed May 23, 2007 8:01 pm UTC
by DonChubby
Spaz Funbag wrote:how old are you? around 14/15? Well, then it is ok.

Yes, I am 15, however my humor is generally quite more mature that that. So i can not explain why I found that funny, let alone two hours after I read it.

Posted: Wed May 23, 2007 8:09 pm UTC
by Spaz Funbag
Congratulations. Yours was the 65536th or 2^16th or 2^(2^(2^2)th post!

Image

Posted: Wed May 23, 2007 8:12 pm UTC
by DonChubby
Spaz Funbag wrote:Congratulations. Yours was the 65536th or 2^16th or 2^(2^(2^2)th post!

Image

Oh-Em-Gee, how did I not notice that? :o

Posted: Wed May 23, 2007 8:13 pm UTC
by Spaz Funbag
quite a thing, huh? Now go out and celebrate it with your friends.

oh, and I destroyed it with that above post :twisted:

Posted: Wed May 23, 2007 8:15 pm UTC
by DonChubby
Spaz Funbag wrote:quite a thing, huh? Now go out and celebrate it with your friends.

I would, had I had friends that cared about it :P

Posted: Wed May 23, 2007 8:20 pm UTC
by Hammer
DonChubby wrote:I would, had I had friends that cared about it :P


Powers of Two party! Whoo hoo!

Posted: Wed May 23, 2007 8:23 pm UTC
by Spaz Funbag
I know what you are talking about! Everyone you know will just look at you all weird, maybe back up, and then stop responding your calls, or change the side of the road when they meet you.

No, but seriously, who would you tell? Or rather, who would care? Luckily, I have some people in RL that would get the point and might be able to get a grin out of it.


Virtual Powers of two party then! w00t, w00t!



I'd better get off and do some serious stuff here. I have to admit though that I was observing the "post" counter on "General" quite a few days, though.

Posted: Wed May 23, 2007 9:06 pm UTC
by andor
Somnia wrote:I play flute in band and guitar and piano very poorly.


Hey!
I used to play flute years ago. I was in the Madrid Flute Orchestra :) Kind of weird a band having 40 to 50 flutes and 3 cellos... ;)

Posted: Wed May 23, 2007 10:13 pm UTC
by SimonSwift
Spaz Funbag wrote:wait - Firefly is geeky?

I thought that would be just "cultish" and maybe "insider-y"
Hm. Am I a geek by that definition?


I'd say it's geek cultish. In any case, I'm definitely a browncoat. But I'm admittedly a geek in many other matters, too, so...Meh.

Posted: Wed May 23, 2007 10:53 pm UTC
by ArchangelShrike
Somnia wrote:And I hold super geeky parties where people get together just to watch Firefly or play Diplomacy.


You play Diplomacy? Any interest of playing a online game? I haven't played in so long, I *almost* forget how to...