#garfield Logs

Apr 26 2012

16:27 katsmeow-afk rue, there's 1000 IS61LV256-15J 32kx8 15ns soj chips going (atm) for $0.10 per chip
16:27 katsmeow-afk 26 m left on auction
16:27 katsmeow-afk static
16:28 katsmeow-afk these could be your multiplier/adder/logic chips
16:28 katsmeow-afk 23 m
16:29 katsmeow-afk i will be depressed if these don't go for $1 per chip, they were over $10 per chip 20 yrs ago
16:31 katsmeow-afk 21m
16:35 katsmeow-afk 17m
16:37 katsmeow-afk 15m
16:39 katsmeow-afk 13m
16:40 katsmeow-afk 11m
16:43 katsmeow-afk 9m
16:43 katsmeow-afk come on, whoever gets this many of these chips for $100 is stealing them
16:44 katsmeow-afk you could make 32megabytes of 8bit memory, or 32k of 8000bits wide memory!
16:45 katsmeow-afk 7m
16:45 katsmeow-afk with 20thou traces, an 8000 bit buss wold be 7ft wide, imagine it!
16:47 katsmeow-afk 5m
16:48 katsmeow-afk rue, it's static ram, drop an address in it's pins, and presto it gives you data!
16:48 katsmeow-afk 10 CENTS PER CHIP!!
16:49 katsmeow-afk 3m
16:50 katsmeow-afk 1:30 m
16:51 katsmeow-afk 1m
16:51 katsmeow-afk 45s
16:51 katsmeow-afk IT'S 10 CENTS PER CHIP FER DOGS SAKES!!!
16:51 katsmeow-afk 25s
16:51 tsmeow-afk c
16:52 katsmeow-afk 10 sec!!!
16:52 katsmeow-afk #$%^#$%YIQERNYI Q$%Y*()Q$ %TU()Q@$%NY*Q@$ *_$*NY)QH$BKJWTRL: HJ@W^)H@OH$
16:52 katsmeow-afk he won it for TEN CENTS PER CHIP
16:52 katsmeow-afk FGHNDJTRM&^IR^&INUNTRGVQEWIQCB(CT%&Q#$BT&*!# Q!B(Q#VP(T%U! #$&TB!#TC&!#%TB@C(P%&CTYB(QPE%&*(BNQ$%PU Q$()G%&*@($P%UGP(@ J@$G (PJ$%LJUI]
16:55 katsmeow-afk and they will now be sold for $4 each chip
17:03 katsmeow-afk woah,, there's another 1000 of them relisted!! and they already have a bidder
19:26 rue_house I told you its a scam, why dont you beleive me?
19:26 katsmeow-afk it's not really 15ns?
19:29 katsmeow-afk hey zhanx, what if you unloaded the pointy end off a tank round, put a same-sized water baloon there, loaded and fired that at ieds?
19:30 katsmeow-afk or, say, since the tank has a long barrel, chamber one round and drop a few more baloons down the barrel?
19:31 katsmeow-afk 50lbs of 3000fps water should disassemble the ied before it explodes
19:33 katsmeow-afk it's worked on car bombs
19:34 katsmeow-afk dunno if you can aim a howitzer that low, but that could provide enough stand-off oomph too
19:38 tsmeow-afk imagines some dope firing an M198 at an ied and simply removing that portion of the pl
19:42 zhanx a 155 would do that
19:42 zhanx makes a large hole
19:42 zhanx again i wok with morons, morons this that caused me to work till 1930
19:43 zhanx if i had a M198 i would do an table 8 on them
19:44 zhanx and the water balloon needs thick skin i would think?
19:47 katsmeow-afk i wouldn't think so, not froma distance of 50ft, you'd want maybe 3ft of dispersal
19:47 katsmeow-afk and those guns have a long barrel to keep the water together
19:47 katsmeow-afk same as shooting quailshot, if it exits the barrle in a pattern it should keep it for a while
19:48 katsmeow-afk i dunno,, as long as the water does not outweigh the original projectile, i don't see a problem,,, unrifled barrel would be best for firing water
19:48 zhanx would have to dampen the charge down A LOT
19:48 katsmeow-afk a drop in liner might work fine
19:49 zhanx other wise it would vaporize the water
19:49 katsmeow-afk why lower the charge? you *want* the very high fps speed
19:50 katsmeow-afk a buffer, praps, like in a shotgun shell
19:50 katsmeow-afk you want the water to penetrate the ied and burst it at a very high speed, faster than the ied sensors mechanically can react and cause a detonation
19:53 zhanx why not just use copper slugs then
19:54 katsmeow-afk they are smaller on impact and collateral damage carries farther
19:54 zhanx but super heated copper goes through just about anything
19:55 katsmeow-afk i know, IF you hit it, and the copper tends to destroy the forensic data
19:56 zhanx well since enough dont go off.... mute point really
19:56 katsmeow-afk i am thnking that blowing water that fast will scoop out a large area of local ground, and not damage anything 20ft to each side, and not set off the ied or remove fingerprints
19:56 katsmeow-afk just a thought
19:56 zhanx katsmeow-afk: most ied's are old artillery rounds
19:57 katsmeow-afk they aren't opened up?
19:57 zhanx "if" they go off, anything hitting them will set them off, not they take off the nose cone and wire 5v in it
19:58 zhanx homemade tends to be fertilizer ones
19:58 katsmeow-afk somehow i thought the high speed water would disassemble them faster than they could go off, it's worked for car bombs in trunks, i saw video
19:59 zhanx car bombs tend to be stolen c-4 type explosive or truck bombs are fertilizer, i would tend to agree it might work tho
20:00 katsmeow-afk they shoved a briefcase containing water and detcord under the car's rear end, and blew the gas tank and the floor of the trunk thru the back of the car, did not set off the gasoline in the tank or the armed bomb
20:00 zhanx water pulse style
20:00 katsmeow-afk yeas
20:00 zhanx its how i take down doors
20:00 katsmeow-afk so try it on the next ied you meet
20:01 zhanx i really don't want to duct tape a iv bag with det cord to a ied tho
20:01 zhanx the idea is even crazy for me
20:02 katsmeow-afk lol
20:02 katsmeow-afk on a stick, a long one,, or like i say, shoot it at the ied
20:02 zhanx i tend to shoot them
20:02 zhanx i have a scope for a reason
20:03 katsmeow-afk yeas, i know, i was trying to save evidence of who planted it
20:03 zhanx in other news, I leg pressed 720 pounds yesterday, my legs are getting again
20:03 zhanx we use chemical sniffers
20:03 zhanx bomb houses are like bright red targets to they
20:03 zhanx them
20:04 zhanx only if they could make them plane mountable
20:05 zhanx http://www.toxel.com/inspiration/2012/03/19/3d-wire-sculptures/
20:05 katsmeow-afk make em real small and real cheap, just sprinkle them around
20:06 zhanx once the evil people get them, they can figure out a way to fool them
20:07 katsmeow-afk oh
20:07 zhanx they are smart
20:07 zhanx just live in a weird to us way
20:08 katsmeow-afk i didn't figure they aere stupid, just didn't know the detectors could be remade to cause problems
20:09 zhanx well if you get one you can test what fools it
20:10 rue_house 14.8k views!
20:10 zhanx or what masks your scents,
20:10 zhanx on what?
20:11 katsmeow-afk rue got sneaky on a light bulb
20:11 zhanx ?
20:11 katsmeow-afk i lost the url,,,, rue?
20:12 zhanx rue_house: stop counting hits and give a link
20:12 katsmeow-afk http://www.youtube.com/watch?v=PHI2GVDeTuk
20:13 zhanx it got on hackaday is why
20:14 zhanx http://hackaday.com/2012/04/25/homebrew-solder-pot-is-too-dangerous-even-for-us/
20:20 rue_house well yea
21:17 rue_house http://eds.dyndns.org/~ircjunk/tutorials/elex/solderpot/main.html
21:18 Jax184 rue_house: the turnip suggested I ask you about the cap tester
21:18 rue_house yes?
21:19 Jax184 I'm attempting to barter a little 1 channel 'scope out of a friend to use it with
21:19 Jax184 and I'll be the one who assembles it all on Tuesday
21:19 Jax184 so I was hoping you could help me understand how it works
21:20 rue_house it puts a square wave cuttent thru the capacitor so you can see the sudden voltage shift caused by the ESR
21:21 rue_house if the capacitor is ok, there will be almost no voltage developed across it, so the circuit its in isn't even triggered
21:21 rue_house http://eds.dyndns.org/~ircjunk/circuits/captester.jpg
21:21 Tom_itx rue_house typically how much current do current sense resistors require?
21:21 rue_house you have the image I presume?
21:22 Tom_itx it's minimal isn't it?
21:22 rue_house Tom_itx, for buddy I used .01R
21:22 Tom_itx no, watts
21:22 rue_house well at .01R 1W,
21:22 Tom_itx for the current sense on a driver chip
21:22 rue_house P = i^2*r yes?
21:22 Jax184 my biggest concern was for how the rest of the circuit would affect it
21:23 rue_house Jax184, dosn't
21:23 Tom_itx they suggest 1/4w but i wondered if 1/8 would be adequate
21:23 rue_house or i*r^2
21:23 rue_house ok P = I*V
21:23 rue_house V = I*R
21:23 Jax184 because I have one of the famous blue ESR meters already, but was under the impression it would give bad readins when tested in circuit
21:23 rue_house P = I * I * R
21:24 rue_house Jax184, You need a scope to interpert the results of mine, I tried to think up how to make it output to just a bar graph, it didn't happen
21:24 rue_house but it can tell you alot
21:25 rue_house P = I^2 * R so
21:25 rue_house P/R = I^2
21:25 rue_house so I = SQRT(P/R)
21:25 rue_house P = 1, R = .01
21:26 rue_house I = sqrt(100)
21:26 rue_house how so I do square root in python?
21:27 rue_house I'm an idiot
21:27 Tom_itx R = 47k or 62.67k depending
21:27 rue_house ok, so .01R, 1W would need 10A to be at rating
21:27 Tom_itx i know nothing about python
21:28 rue_house I'm too brain dead right now to notice that sqrt(100) = 10
21:28 rue_house :)
21:29 Tom_itx R(in K) = 47 * I / (7 - I)
21:30 rue_house Tom_itx, ?
21:30 rue_house what are you on about
21:30 Tom_itx for my driver current sense R
21:30 rue_house 47k is NOT a current sense resistor
21:30 Tom_itx is so
21:30 rue_house not really
21:31 Tom_itx well they call it 'current set'
21:31 rue_house maybe if your current is in the order of pA
21:31 Tom_itx it's the one you find on the feedback pin of alot of drivers
21:33 rue_house ah
21:33 rue_house its the current set resistor
21:34 Tom_itx 1 sec after last pulse current is reduced 71% to eliminate motor heat
22:25 katsmeow-afk if you use a low impedance current source driving a triangle wave, that you can measure current and voltage, you'll find the current tracks the voltage very well on low esr caps, but on high esr caps the current is "wrong" on the voltage waveform where the voltage reverses
22:26 katsmeow-afk awrgg,, afk again
22:26 rue_house kat, its for testing bad caps,
22:26 katsmeow-afk bbl
22:26 rue_house dont want to know the capacitance value, just the amount of est
22:26 rue_house r
22:26 katsmeow-afk i know
22:26 katsmeow-afk but if it's known bad, why are you testing it?
22:27 rue_house cause their not known bad
22:27 rue_house some f them dont even look bad
22:27 katsmeow-afk [22:16] <rue_house> kat, its for testing bad caps,
22:27 rue_house ok, well
22:27 katsmeow-afk i gotta go, sorry
22:27 e_house withdrawls his foot from his m
22:27 rue_house 8-|
22:42 rue_house I found two intelligent girls, one is in china and the other is in france
22:52 Jax184 surely there are more than that in the world
22:52 rue_house cant confirm there are more than 5 total
22:53 rue_house kat, rebecca, robotgrrl, and the two I found you skype, but they aren't as smart as those first three
22:54 rue_house you/on/
22:55 rue_house thats an every age/every country search
23:47 katsmeow-afk bak
23:49 katsmeow-afk so,, one in usa, oz, france, china, netherlands
23:49 Jax184 http://www.jax184.com/pictures/room/02-2011+/T1i_9772s.JPG - have a nerdy photo I took today of my retrodesk
23:49 katsmeow-afk i daresay the rest are not on because of the very treatment i got in #ai yesterday
23:50 katsmeow-afk omd, rue HELP Jax!!!!
23:50 katsmeow-afk look at that desk!!!
23:50 Jax184 what's wrong with it?
23:50 katsmeow-afk how can you work on that desk?! it's too clean, man that would drive me nuts!!
23:50 Jax184 as I said, that's my retrodesk
23:50 Jax184 it's for playing old games, running old software, etc
23:50 katsmeow-afk i have that switch box under the monitor
23:51 katsmeow-afk i sold that keybd last yr
23:51 Jax184 http://www.jax184.com/pictures/room/05-2007%20-%2002-2011/T1i_5754s.JPG - my main desk looks like this
23:52 Jax184 http://www.jax184.com/about.html - this is how I had everything set up before my landlord rudely sold my house out from under me, requiring that I move into a small moldy basement where none of my benches quite fit
23:53 katsmeow-afk ah yeas, barely enough room for the soldering iron, been tehre, my condolences
23:55 katsmeow-afk my site is designerthinking.com
23:55 katsmeow-afk http://DesignerThinking.com/computerlab.html
23:55 Jax184 speaking of which, our Turnip was kind enough to give me a good price on an awesome soldering iron which had come through the Hackery
23:56 Jax184 it's built by Pace and I like it a lot
23:56 katsmeow-afk no ne wants a smart puter tho, so i have not writte any code for Tiggr in over a yr
23:57 katsmeow-afk i just tried moving, to Fla, and that didn't work, so all my stuff is still in boxes too
23:58 Jax184 I've been going through all mine, removing crap, and re-packing them better
23:58 Jax184 the goal is not so much to fit in here as to move again
23:58 Jax184 and I don't want the next move to be as drawn out as the last one
23:59 Jax184 or as costly, in terms of broken stuff
23:59 iamturnip Jax184: nice to see you in the room Jax184
23:59 katsmeow-afk yeas, tell me about it, i lost 2 harddrives and just have not checked any more of them
23:59 katsmeow-afk that's a pricey good HP signal generator you have there