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12-30-2002, 06:16 AM
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Flashaholic*
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Join Date: Jan 2002
Posts: 2,389
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Arc AAA LE survives dunk in Liquid Nitrogen!
I wouldn't believe it either except it happened today to mine! I was messing around and my arc fell into a small open container of liquid nitrogen! It had stopped bubbling by the time that I got something to get it out with. (I love my arc but I love my fingers more) I thawed it out and put a new battery in it and it works just as good as new!!!!!! can you believe it? It took a good 5 minutes to thaw out and the foam ring dosen't look very good but it works!
How is that for a torture test!!
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12-30-2002, 06:21 AM
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Flashaholic*
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Join Date: Jan 2002
Location: Bay Area, CA
Posts: 3,383
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Well......
it's not like it was liquid helium....
[img]images/icons/grin.gif[/img]
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12-30-2002, 06:24 AM
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Mostly MIA Administrator  |
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Join Date: Jun 2002
Location: Utah
Posts: 7,909
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Just "accidently" dropped it eh? [img]images/icons/wink.gif[/img]
Well don't go "accidently" dropping it into hydro chloric axid [img]images/icons/shocked.gif[/img]
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12-30-2002, 06:45 AM
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Flashaholic*
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Join Date: Jan 2002
Posts: 2,389
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Yup Sabby, Just accidently happened to have a stainless steel bowl full of liquid nitrogen and it just accidently fell in it! [img]graemlins/winkie.GIF[/img] [img]graemlins/icon3.gif[/img] [img]graemlins/icon15.gif[/img]
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12-30-2002, 06:46 AM
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Flashaholic*
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Join Date: Jan 2002
Posts: 2,389
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
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12-30-2002, 06:50 AM
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Flashaholic*
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Join Date: Jan 2001
Location: Mesa, AZ. USA
Posts: 4,798
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
No fractures in the aluminum or the LED?
That is something...
Peter Gransee
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12-30-2002, 08:29 AM
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Flashaholic*
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Join Date: Jan 2002
Posts: 2,389
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
No cracks seen to the naked eye.
Does any one have access to a scanning electron microscope or Hi res ultrasound or something to check for microscopic cracks? Mabey I could do it again and photograph the thing bubbling in the liquid nitrogen.
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12-30-2002, 08:43 AM
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Flashaholic*
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Join Date: Oct 2002
Location: Same Area Code As Death Valley
Posts: 2,978
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Ya, and I just accidently tripped a nuclear device. Bushman, I'd never let you borrow any of my lights.
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12-30-2002, 08:58 AM
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Flashaholic*
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Join Date: Jan 2002
Posts: 2,389
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
I'm sorry Marty! I bet all of your lights are glowing now so no thanks! [img]graemlins/winkie.GIF[/img]
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12-30-2002, 02:17 PM
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Flashaholic
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Join Date: Oct 2002
Posts: 281
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Bushman,
[img]images/icons/grin.gif[/img] Did you remember to yell "D'Oh!", [img]images/icons/grin.gif[/img] or were you too busy giggling hysterically? [img]images/icons/grin.gif[/img]
Glad to hear that you used something besides your fingers to pick it up.
Hmmm... I hear a supercooled runtime & beam shot request coming on. [img]images/icons/grin.gif[/img]
Of course you'll need to do individual tests using both Alkaline and Lithium$.
S'pose you'll also need to time how long it takes to stop bubbling for the data collectors among us as well.
Good job! Please keep us posted on further developments. [img]graemlins/icon14.gif[/img] This could help Peter on the Everest conquest, if the "torch" can stand liquid nitrogen, then it could handle anything that Everest could throw at it.
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12-30-2002, 02:50 PM
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Flashaholic*
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Join Date: Mar 2001
Location: dayton oh
Posts: 2,389
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
and i thought my aaa had it rough sitting overnight in a drain pan full of used dexron v and motor oil!it was hot too.couldnt find the aaa after the car work so i was extra carefull when i put the spent oil/atf in jugs for disposal.
sprayed it with simple green and rinsed it off and no harm done!
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12-30-2002, 03:10 PM
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Flashaholic*
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Join Date: Oct 2002
Location: Same Area Code As Death Valley
Posts: 2,978
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
I feel guilty that my AAA is safe and sound in my cars visor. Never been dropped in corrosives or pushed inside a shredder or urinated on by circus animals.
I must be doing something wrong!
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12-30-2002, 03:23 PM
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Flashaholic*
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Join Date: Jun 2002
Location: Singapore
Posts: 2,441
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
If anyone did notice Luxeon Star's Spec sheets... 5 watters give 120% of their normal light output at -20 degrees celsius. BUT! Amber/Red-Orange LEDS!!! 1 WATT Amber/Red-Orange LEDS give 180%-200% their normal output if given -20 degress celsius! OMG!!! 100 lumens / watt anyone? [img]images/icons/grin.gif[/img] Let's say we put a powerful peltier cooler inside.... a 2 watt model.... heheh.. help, I can't stop imagining the possibilities..... someone any one, help, I am laughing till my sides ache....
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12-30-2002, 04:02 PM
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Flashaholic
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Join Date: Feb 2002
Location: Benicia, CA
Posts: 476
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Quote:
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Never been dropped in corrosives or pushed inside a shredder or urinated on by circus animals.
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<font size="2" face="Verdana, Arial">My Arc LE has fallen into some giraffe poop, and yes it still works just fine!
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12-30-2002, 04:08 PM
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Banned
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Join Date: Jun 2002
Location: Seattle, WA area
Posts: 2,294
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Heheheheh ... Well, Bushman, your Arc AAA has had a tougher test than mine has, that's for sure.
All mine had to endure was going through a hot wash in a pocket of my pants, and most of a drying cycle - until it came out of the pocket and sounded like I was drying part of my rock collection [img]images/icons/shocked.gif[/img]
Didn't seem to annoy the little beast in the least, though.
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12-30-2002, 04:26 PM
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Flashaholic*
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Join Date: Oct 2002
Location: Same Area Code As Death Valley
Posts: 2,978
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
It sounds like Gransee could use these testimonials to sell more lights. I especially like the giraffe poop story. Do Game Wardens represent a large market?
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12-30-2002, 04:28 PM
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Flashaholic
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Join Date: Apr 2002
Location: Colorado
Posts: 131
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
OK all of this stuff about the arc aaa in cold!!
what does it do in boiling water. I am not brave enough to try it myself.
Scott
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12-30-2002, 07:46 PM
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Flashaholic
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Join Date: Feb 2001
Location: Long Island, NY
Posts: 432
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
LEDs do well in liquid nitrogen. I don't know about the circuits, but I've dunked an LED in liquid nitrogen while lit and it worked as if it were water.
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12-30-2002, 09:09 PM
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Enlightened
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Join Date: Dec 2001
Location: San Jose CA
Posts: 61
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
intresting... I wonder what would happen if it was turned on, and then fell in. extreme case of LED cooling. has anyone tried driving a LED in LN2 driven with increasing current until failure, or reduced output?
b.
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12-30-2002, 09:31 PM
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Flashaholic
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Join Date: Feb 2002
Location: Cambridge, England
Posts: 401
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
The alkaline battery would probably be the weak point here (or at least one of the weak points). Alkalines have troubles at cold temperatures (room temperature is ideal).
- Russ
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12-30-2002, 10:08 PM
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* The Arctic Moderator *
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Join Date: Sep 2002
Location: "The 49th State"
Posts: 13,153
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Quote:
Originally posted by NightShift:
LEDs do well in liquid nitrogen.
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<font size="2" face="Verdana, Arial">Frogs don't! I didn't do it, but saw it...
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12-30-2002, 11:35 PM
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Flashaholic
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Join Date: Feb 2001
Location: Long Island, NY
Posts: 432
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Ew, hope it didnt explode, was it dunked alive? lol
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12-31-2002, 01:23 AM
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* The Arctic Moderator *
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Join Date: Sep 2002
Location: "The 49th State"
Posts: 13,153
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
It died instantly, did not explode. The idiot took it out and threw it on the asphalt. Sounded like throwing a ceramic cup down. Then it thawed pretty quick too...
Good way to get hurt as far as I'm concerned. Was sort of a "Jimmie & Mr. Wizard" science thing, but the guy didn't earn any respect for it.
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12-31-2002, 04:38 AM
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Flashaholic*
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Join Date: Jan 2002
Posts: 2,389
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Even with the 25 second dunk it stopped bubbling in about 20 seconds. I am still not sure that it got to steady state however. I guess I could try it again but If it went kaput. then I would be with out a Arc... I only have this one and I don't think I will do it again unless someone was willing to pony up a used Arc AAA LE. If someone tells me that they will do this, then I will dunk it for 5 minutes and photograph the whole thing from start to finish and post the pictures as well as allow Peter to have full rights to the pictures to use however he sees fit.
I will, if it dies, also send the specimen back to Arc for thier examination if Peter so chooses.
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12-31-2002, 04:42 AM
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Flashaholic*
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Join Date: Jul 2002
Location: London
Posts: 2,266
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Peter G. may be interested in backing up your experiment with a replacement Arc, after all if it does survive a 5 minute dunk, it would make for a great advert for Arc durability.
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12-31-2002, 10:15 AM
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Flashaholic
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Join Date: Mar 2002
Location: Long Island, NY
Posts: 240
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
If anybody wants one tested in Liquid Helium, send it to me.
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12-31-2002, 10:29 AM
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Flashaholic*
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Join Date: Mar 2001
Location: dayton oh
Posts: 2,389
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
i imagine the aluminum parts would take it just fine.
but some smt parts may crack due to differing rates of expansion/contraction.
just dont drop it while frozen.(sound of something shattering)
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12-31-2002, 10:37 AM
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Flashaholic*
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Join Date: Sep 2002
Location: A very strange dark place
Posts: 4,210
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
I can't wait until they are available again!
I work on medical equipment for a living and can think of some of the entertaining things I can do with some of the equipment there. First off, get a shot of the curcuits with the good ole' X-Ray unit. After that, throw it in a plasma sterilizer (simulates outer space at 114F) Hammer it with a N2O gun (made by a company called Gynetech, figure it out) Take a shot of it in the mammography machine. Test it for leakage current with an ECG machine. See what kind of image I can get with an ultrasound. Run it over with a portable X-Ray unit... this sounds like fun.
Things that I think would kill it. Steam sterilization (270F @ 30 PSI), defibrillator shocking it, electrosurgical equipment arcing to the case... I better not get carried away though, I can imagine this: "Mr. Smith, it looks like there is a small flashlight wedged in your colon, must have been left during surgery." Yeah, that would not go over well.
Now to get one and start shooting pix of the internals with the x-ray unit. Should be interesting, more interesting than shooting Fluke meters. Maybe somebody could send me a AAA LE so I can get the correct settings..... [img]images/icons/wink.gif[/img]
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12-31-2002, 07:31 PM
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Flashaholic*
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Join Date: Oct 2001
Posts: 726
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
Sheesh, I'm glad I didn't do that. "Natural" human reaction would have probably made me dip my hand in there!
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12-31-2002, 09:46 PM
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Flashaholic
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Join Date: Feb 2001
Location: Long Island, NY
Posts: 432
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Re: Arc AAA LE survives dunk in Liquid Nitrogen!
It it supposed to fail though? I thought components' enemy is heat. Or are you doing it for durability purposes.
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