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Log from 2007-07-20:
--- Day changed Fri Jul 20 2007
00:29 <spidey> erm
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01:02 <spidey> http://www.freetalklive.com/tunein.php
01:11 <Lucifer_work> ?
01:13 <spidey> ?
01:27 <Lucifer_work> ??
01:27 <Lucifer_work> ??
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01:46 <Lucifer_work> er
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02:28 <Your_mom_arma> #ping
02:29 <armabot> pong
02:29 <spidey> #pong
02:29 <spidey> bastard :(
02:30 <Your_mom_arma> haha
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02:55 <Vanhayes> spidey: Lucifer_work luke-jr Your_mom_arma up for a game of freeciv later on tonight?
03:01 <Your_mom_arma> Pong, maybe... if you can get a game together.
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04:59  * digitx is away (bye)
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06:39 <Lucifer_arma> damn, mom was here and I missed him
06:39 <Lucifer_arma> anybody know how to safely discharge a computer power supply for complete disassembly?
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06:42 <dmb> Lucifer_arma: what i would do is take out the plug, and then press the power button
06:42 <dmb> it will click on then turn off once dishcharced
06:42 <Lucifer_arma> there's an idea
06:42 <dmb> but i don't know if its completely discharched though
06:42 <Lucifer_arma> it's an AT supply, so it's got a real switch attached to it
06:43 <dmb> hmm
06:43 <dmb> don't rely on what i say though, i don't know if it completely discharges
06:43 <dmb> but thats what i'v done before
06:43 <Lucifer_arma> well, I've got a page here telling me to discharge every capacitor one at a time :/
06:44 <Lucifer_arma> with stuff I don't have, so I'll have to take it to work to do it (where we have all the stuff)
06:45 <Lucifer_arma> I need to get at a transformer that's in pretty much the middle of the board, and I want to take the rest of the stuff off and put it in bags and keep for future use :)
06:45  * Lucifer_arma is dirt-broke and can't buy new electronics gear, but wants to fool with the stuff
06:45 <Lucifer_arma> anyway, I figure all the parts I need to build a small power supply for my weed eater are probably in this power supply
06:46 <Lucifer_arma> is there any part besides capacitors that will keep energy?
06:47 <Lucifer_arma> also, it appears that if the thing sits unpowered for a long time, it'll lose it's stored-up electricity, and it has sat unpowered for a long time
06:56 <Lucifer_arma> I guess it doesn't matter a whole lot tonight anyway, since I failed to find my soldering iron and am not even sure I still have it
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07:13 <Lucifer_arma> heh, found my soldering iron :)
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07:36 <wrtlprnft> why the hell does the grinding page on the wiki link to the tron movie?
07:37 <wrtlprnft> no CYCLE_ACCEL there…
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08:16 <spidey> hm
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08:57 <spidey> http://img167.imageshack.us/img167/5420/lolzl4.jpg
08:57 <spidey> that sucks :(
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09:31 <Lucifer_arma> looks like you have room, though
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10:56 <epsy> hi
11:01 <spidey> popups man...
11:01 <spidey>  i don't have a popup blocker so i can get mother fucking popups about popup blockers!
11:02 <epsy> erm...use firefox ? opera ?
11:02 <spidey> i'm using firefox....
11:02 <epsy> "pwnt"
11:02 <spidey> -.-
11:02 <epsy> are you on wingblows ?
11:03 <spidey> that has nothing to do with getting popups...
11:03 <epsy> what fucking site are you getting popups on ?
11:03 <epsy> you have adblock installed, right ?
11:03 <spidey> can't sa :p
11:03 <spidey> say*
11:04 <epsy> here is your problem :p
11:04 <spidey> ?
11:04 <epsy> nvm
11:04 <epsy> <epsy> you have adblock installed, right ?
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11:28 <P4> #serverinfo arena
11:28 <armabot> P4: ~|DS|~DarkSyndicate's Arena {100MBit}: No online players.
11:28 <P4> #serverinfo ps
11:28 <armabot> P4: There doesn't seem to be a server matching “ps” at the moment, sorry.
11:29 <hoop_tron> howhowhow
11:29 <hoop_tron> czeschie
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11:43 <P4> czesc
11:43 <P4> #plugin wiki
11:43 <armabot> P4: Error: There is no command "wiki".
11:43 <P4> #plugin wikipedia
11:44 <armabot> P4: The "wikipedia" command is available in the Alias plugin.
11:44 <P4> #help wikipedia
11:44 <armabot> P4: (wikipedia <an alias, 0 arguments>) -- Alias for "google site:http://en.wikipedia.org/ $*".
11:52 <hoop_tron> #wikipedia
11:52 <armabot> hoop_tron: Search took 0.11 seconds: Main Page - Wikipedia, the free encyclopedia: <http://en.wikipedia.org/>; Guadeloupe national football team - Wikipedia, the free encyclopedia: <http://en.wikipedia.org/wiki/Guadeloupe_national_football_team>; Shijiazhuang - Wikipedia, the free encyclopedia: <http://en.wikipedia.org/wiki/Shijiazhuang>; Jesse Owens - Wikipedia, the free encyclopedia: (2 more messages)
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14:47 <Lucifer_arma> so how do I know how much current is going to pass through my circuit?
14:47 <Lucifer_arma> is that something that's defined by the load?  (in this case it's a 1.6 amp dc motor)
14:52 <DrJoeTron> god damn
14:52 <DrJoeTron> i just got back from work
14:54 <guru3> if it's a 1.6amp motor... wouldn't it be 1.6 amps?
15:00 <Lucifer_arma> ummm, sure.  :)  Thanks.
15:00 <Lucifer_arma> So my next question, then
15:01 <Lucifer_arma> if I have a diode, one of those fancy setups that gets both sides of the AC current, and I have enough resistors, do I really need a transformer to step down the voltage?
15:01 <Lucifer_arma> I'm looking at Ohm's law, here
15:01 <Lucifer_arma> so, 1.6 = 12/r
15:01 <Lucifer_arma> or, r = 12/1.6
15:01 <Lucifer_arma> #math calc 12/1.6
15:01 <armabot> Lucifer_arma: 7.5
15:01 <Lucifer_arma> so a 7.5 ohm resistor should do it, right?
15:02 <Lucifer_arma> (ignoring the voltage drop over the diode, of course)
15:04 <Lucifer_arma> wait a minute, that's not right
15:04 <Lucifer_arma> I've got 110 V coming in, and the diode
15:05 <Lucifer_arma> so after the diode, it's still about 110 V, right?
15:05 <Lucifer_arma> so can I load up enough resistors to drop the voltage down to 12 volts and have it work?
15:05 <Lucifer_arma> or do I even need to worry about it, and just do ohm's law with 110 V?
15:06 <Lucifer_arma> r = 110/1.6
15:06 <Lucifer_arma> #math calc 110/1.6
15:06 <armabot> Lucifer_arma: 68.75
15:06 <Lucifer_arma> so, 68.75 ohm resistors needed then
15:07 <Lucifer_arma> or am I missing something?
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15:22 <wrtlprnft> #later tell lucifer* that should work assuming your motor doesn't have any resistance (which it probably has), but it would waste quite a huge amount of energy…
15:22 <armabot> wrtlprnft: The operation succeeded.
15:22 <epsy> does it actuall works with wildcards ?
15:22 <epsy> *y
15:22 <wrtlprnft> yeah.
15:23 <epsy> ah. kewl.
15:23 <wrtlprnft> #later tell *ps* it does
15:23 <armabot> wrtlprnft: The operation succeeded.
15:23 <epsy> ah. kewl.
15:23 <wrtlprnft> #math calc 1.6*110
15:23 <armabot> wrtlprnft: 176
15:23 <wrtlprnft> 176 watts… nice.
15:25 <wrtlprnft> #later tell lucifer* about 176 watts wasted… Quite a bit of heat, too, and be careful as most resistors will get fried by that.
15:25 <armabot> wrtlprnft: The operation succeeded.
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15:50 <Lucifer_arma> so am I right that the motor doesn't care about the voltage?
15:50 <Lucifer_arma> Or does the motor really do care that it's 12 V?
15:50 <Lucifer_arma> aha, got your message, wrtlprnft :)
15:50 <Lucifer_arma> so I still want to step down the voltage, it's just not so important that I hit 12 V?
15:52 <Lucifer_arma> how about deciphering the symbols on a transformer?
15:57 <guru3> the thing about resistors
15:57 <guru3> is that they use energy
15:57 <guru3> and so they heat up
15:58 <guru3> if you try to run too much current through too small of a resistor it will explode
15:58  * guru3 has done that
15:58 <Lucifer_arma> heh
15:59 <Lucifer_arma> I'm just trying to understand this stuff right now :)
15:59 <Lucifer_arma> I've got two transformers, and I need to figure them out
16:00 <guru3> DC or AC?
16:03 <Lucifer_arma> beats me
16:03 <Lucifer_arma> came out of a computer power supply, so I assume ac
16:04 <Lucifer_arma> of course, if I could decipher the markings, I could tell you :)
16:28 <Lucifer_arma> ok, I think I've got it
16:29 <Lucifer_arma> voltage(secondary)/voltage(primary)
16:29 <Lucifer_arma> so if I plug it into a power supply on one end and a block of resistors on the other end, and take the voltage readings, I should have it
16:29 <Lucifer_arma> then reverse the connections and do it again
16:30 <Lucifer_arma> only there's 8 pins on one side and 3 on the other
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17:00 <guru3> sounds complex
17:15 <epsy> #armaservers
17:16 <armabot> epsy: This data is 177 seconds old; Crazy Tronners Wild Fortress (12/14), Wild West  =Wild Fortress= (10/12), Wild West  =Capture The Flag= (9/10), ~*SpeederS*~ Server (9/12), Secret Shadow Group (8/16), ¬| D u r k a  D u r k a  L a n d | ¬/xff9900 (8/16), GEMINI PROJECT (6/6), The YELLOW Submarine (6/16), Fortress Café (6/32), Norm's Place (5/12), SPACEZONE [VERY HIGH SPEED!!] (4/8), The Tavern (1 more message)
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18:06 <Lucifer_arma> ok, here's a question :)
18:07 <Lucifer_arma> when I put 12VAC in with a 100 ohm resistor (the voltmeter reads 14VAC), I get .073VAC out the other end of the transformer
18:07 <Lucifer_arma> but when I put in 2 50 uF capacitors parallel to the resister on the input, I get .492VAC out the other end
18:07 <Lucifer_arma> why do I get any increase at all when I put capacitors in there?
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18:30 <deja_vu> because ac current can get through capacitors better
18:31 <deja_vu> depending on the freq and capacity
18:35 <deja_vu> and maybe the voltage in them adds up to the measured voltage
18:35 <Lucifer_arma> they're marked 200V, heh
18:36 <Lucifer_arma> so, is it safe to use resistors to step down from 20VDC?
18:36 <Lucifer_arma> hmmm, lemme see
18:36 <Lucifer_arma> 12.5 ohms for my target
18:36 <Lucifer_arma> and there will be an led in there somewhere because leds are cool
18:47 <deja_vu> hehe
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22:19 <wrtlprnft> how would one buid a DC transformer?
22:20 <|Sticky|> AC to DC ?
22:21 <|Sticky|> or DC - DC
22:21 <wrtlprnft> ac to dc is trivial
22:21 <|Sticky|> DC - DC you oscillate the signal put a ac transformer in then rectify it at the other ent
22:21 <|Sticky|> end even
22:22 <wrtlprnft> boring x_X
22:22 <|Sticky|> thats why DC -DC transformers are realy inefficent
22:22 <wrtlprnft> is there any efficient way to oscillate a signal?
22:23 <|Sticky|> oscillateing the signal isnt inefficient its the rectifying thats the problem
22:24 <wrtlprnft> wouldn't four diodes and a capacitor be enough?
22:24 <wrtlprnft> to get a nearly constant current
22:24 <|Sticky|> for a VERY rough rectification yes
22:24 <wrtlprnft> enough to put through a DC motor, anyways
22:25 <wrtlprnft> you don't even really need the capacitor there :)
22:25 <|Sticky|> oh god yeah DC motors realy dont care about signal stability
22:25 <|Sticky|> why do you want to put a transformer on to a motor??
22:26 <wrtlprnft> because you don't want to fry it?
22:26 <|Sticky|> PWM it
22:26 <wrtlprnft> btw, i'm referring to a conversation with lucifer earlier
22:26 <|Sticky|> ok
22:27 <|Sticky|> is this motor to be controlled or perminently on?
22:27 <wrtlprnft> he wanted to use a motor designed for 12V with a 110 volt power source
22:27 <wrtlprnft> and wanted to use resistors
22:28 <wrtlprnft> instead of a transformer
22:28 <wrtlprnft> dunno, sorry
22:29 <|Sticky|> but that must be 110V ac
22:29 <wrtlprnft> yeah, of course
22:29 <wrtlprnft> he wanted to solve that with diodes
22:30 <wrtlprnft> forgot the english term for this 4-diode circuit to convert from AC to rough DC
22:30 <|Sticky|> bridge rectifier
22:30 <wrtlprnft> ah, thanks
22:31 <|Sticky|> brave man wanting to build his own rectifier, for the sake of the $5 it will cost id just buy a ac-dc converter from the store
22:33 <wrtlprnft> why would you actually want to build a rectifier if you try to get the voltage down, anyways
22:33 <wrtlprnft> wouldn't a single diode halve the effective voltage?
22:34 <|Sticky|> problem is almost no cuircuit will run on ac so you could divide the voltage using a potential divider but it would still be ac
22:35 <|Sticky|> putting 110v across a diode would blow it up
22:35 <wrtlprnft> oh, really :)
22:35 <wrtlprnft> you need some measure to get the voltage down, anyways
22:36 <wrtlprnft> and you should be able to find a diode that accepts 24V and a current of about 1.6A
22:36 <|Sticky|> not sure you can get a single diode that will do 24V
22:37 <wrtlprnft> then get two :)
22:38 <|Sticky|> yeah
22:38 <wrtlprnft> or four, but then it's sort of pointless
22:38 <|Sticky|> not realy you can chain as many as you like...no real problem other than cost
22:39 <wrtlprnft> and resistance if you overdo it
22:40 <|Sticky|> well no cos didoes present a variable resistance depending on the voltage you put over them
22:40 <wrtlprnft> meh… the wires/whatever you use to connect them don't ;)
22:40 <wrtlprnft> you just have to REALLY overdo it
22:41 <|Sticky|> http://rswww.com/cgi-bin/bv/rswww/searchBrowseAction.do?Nr=AND%28avl%3auk%2csearchDiscon_uk%3aN%29&Ntk=I18NAll&Nty=1&Ntt=zener&Ntx=mode%20matchpartial&N=4294729805%204294681741%204294690671&forwardingPage=search&name=SiteStandard&obs=fObs&callingPage=/jsp/search/search.jsp&BV_SessionID=@@@@0401739622.1184964062@@@@&BV_EngineID=ccckaddlhhfkdgjcefeceeldgondhgh.0&cacheID=uknetscape
22:41 <|Sticky|> thats the most powerful 24v i can see
22:41 <|Sticky|> will only do 0.8w tho
22:41 <|Sticky|> 0.8A even
22:42 <wrtlprnft> where do you get those numbers from?
22:42 <|Sticky|> RS
22:42 <|Sticky|> what country?
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22:42 <wrtlprnft> ?
22:43 <|Sticky|> what country is this for?
22:43 <wrtlprnft> no, where did you read the .8w on that page
22:43 <wrtlprnft> it says UK at the bottom
22:43 <|Sticky|> its a 20W diode P=VI so I=P/V, I=20/24 I=0.8
22:44 <wrtlprnft> yeah, of course
22:44 <wrtlprnft> 22:41 <|Sticky|> will only do 0.8w tho
22:44 <|Sticky|> the corrected myself and said amps
22:44 <wrtlprnft> or is 1w ≠ 1W?
22:44 <|Sticky|> [21:44:57] <|Sticky|> 0.8A even
22:44 <wrtlprnft> ok, i misunderstood you
22:45 <wrtlprnft> didn't catch the meaning of “even”
22:46 <|Sticky|> if this component is to be deliverd to america then radioshack will probably order it for you if not Digikey may be a good place
22:46 <wrtlprnft> argh, it's all hypothetical
22:46 <wrtlprnft> and lucifer is buiding the thing, whatever it is
22:46 <wrtlprnft> i just don't want to be near it when he plugs it in
22:47 <|Sticky|> yeah all I can say is DONT go anywhere near mains, or anything above about 30V
22:47 <wrtlprnft> luckily he's far enough away
22:48 <|Sticky|> my best work has been short circuiting Li-Poly batteries...not good at all
22:48 <wrtlprnft> messy?
22:50 <|Sticky|> flaimy: http://uk.youtube.com/watch?v=v7abq34mckg
22:53 <|Sticky|> actualy this ones better: http://uk.youtube.com/watch?v=4OsBc8RqSKU&mode=related&search=
22:59 <wrtlprnft> the second one is more to the point
22:59 <wrtlprnft> in the first one the guy manages to hold the battery out of sight just when it burns the most
23:04 <|Sticky|> out of interest what is lucifer trying to do?
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23:54 -!- Lucifer_arma [n=satan@adsl-68-91-193-82.dsl.austtx.swbell.net] has joined #armagetron

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Logs from 2006-2009 pulled from wrtlprnft
Format changes at: 2015-08-25, 2017-02-20, and 2020-03-23. Times (2015 and later) should be Eastern.


 
 
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