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Topic: A little dilemma (Read 2516 times) previous topic - next topic

madworm

Is there a reasonable way to avoid led poisoning?

It seems exposure can't be avoided... what to do?
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retrolefty


Is there a reasonable way to avoid led poisoning?

It seems exposure can't be avoided... what to do?


Simple, just don't eat or lick the little bright two terminal things.

Lefty

Valalvax

Same advice for the element...

As long as you don't eat/lick/rub your eyes afterwards you won't have any problems at all

And if you're just a hobbyist, even if you do that you probably won't have problems...

Chuckz


Is there a reasonable way to avoid led poisoning?

It seems exposure can't be avoided... what to do?


Just remember, you can always wash your hands afterwards.

retrolefty

Oh did you mean LEAD and not LED?  :D

Lefty

Graynomad

I've been handling this stuff for decades and it's never caused me any problems.

I say it's never caused me any problems.
I say it's never caused me any problems.
I say it's never caused me any problems.
I say it's never caused me any problems.



Did I mention that it's never caused me any problems.

Oh I say, is that the time?
Rob Gray aka the GRAYnomad www.robgray.com

Benji

Don't eat it or get it in your body through a different channel. :smiley-zipper:
A little soldering won't get you lead poisoning, just don't lick your fingers all the time while handling solder.
Washing hands is always a good idea when handling electronics stuff, I've noticed a lot of components feel dusty when they come out of the packaging, my hands always feel strange when I've been messing around with electronics stuff.

Valalvax


Don't eat it or get it in your body through a different channel. :smiley-zipper:
A little soldering won't get you lead poisoning, just don't lick your fingers all the time while handling solder.
Washing hands is always a good idea when handling electronics stuff, I've noticed a lot of components feel dusty when they come out of the packaging, my hands always feel strange when I've been messing around with electronics stuff.



I believe that's a dusting agent to help prevent moisture

Don't quote me on that, I'm probably wrong

Benji

There is an exception in RoHS for solder.
In some cases lead-free solder cannot be used or will not be reliable enough, so they made an exception in the directive.
Luckily, otherwise our products (at work that is) would not work as reliable as they do now.

Simpson_Jr

Yes, there is, use lead-free solder only...

You'll need a little more heat which... can be tricky with sensitive components.

After having worked in PCB-assembly for two years I'd be far more worried about flux & rosin by the way.

Flux is a pretty aggressive dissolvant and I've seen loads.... of colleagues with related headaches.
Rosin solidifies again after it's heated and I haven't really seen health issues that proved to be related.
But looking at the amount of rosin that I collected daily cleaning the suction tool of my Iron, I guess smoking tobacco is just as healthy.

Onions

If you're really worried, wear gloves. Otherwise, my advise would just to be careful.
XD
My website: http://www.harryrabbit.co.uk/electronics/home.html Up and running now! (Feel free to look round!) :D

madworm


Oh did you mean LEAD and not LED?  :D

Lefty


I will not answer this question  ]:D

This is the 'bar sport' area after all.
• Upload doesn't work? Do a loop-back test.
• There's absolutely NO excuse for not having an ISP!
• Your AVR needs a brain surgery? Use the online FUSE calculator.
My projects: RGB LED matrix, RGB LED ring, various ATtiny gadgets...
• Microsoft is not the answer. It is the question, and the answer is NO!

Valalvax

Oh, by the way, I think you can avoid LED poisoning by using current limiting resistors

madworm

#13
Feb 07, 2011, 11:37 pm Last Edit: Feb 07, 2011, 11:39 pm by madworm Reason: 1
Current... yes I remember a joke...

"A friend of mine drowned in a bowl of muesli. He was drawn in by a strong currant."

Please forgive me for this one.
• Upload doesn't work? Do a loop-back test.
• There's absolutely NO excuse for not having an ISP!
• Your AVR needs a brain surgery? Use the online FUSE calculator.
My projects: RGB LED matrix, RGB LED ring, various ATtiny gadgets...
• Microsoft is not the answer. It is the question, and the answer is NO!

cr0sh


But looking at the amount of rosin that I collected daily cleaning the suction tool of my Iron, I guess smoking tobacco is just as healthy.


I don't know if you're a smoker, know one, or have paid attention to cigarette ads - but it used to be common to advertise cigarettes in terms of "contains low tar".

What is "tar"? Tar is a gooey (and generally foul smelling) substance left behind by incomplete combustion of organic matter. Typically, its a part of smoke; when organic matter (particularly resinous plant matter) is heated and burned, the hot smoke contains gases which, if cooled, leave behind this substance. In the case of cigarette smoke, the majority of cooling happens inside the mouth, throat and lungs. Knowing how gooey and ugly the substance is, that isn't a good thing. If you can cool the smoke or filter it in some manner (ahem - in a hookah or bong), a lot of the tar will be left behind, leaving you with a "smoother" smoke, and less irritation to the lungs.

So - what does this have to do with flux and resin?

Well - that stuff is usually made from plant materials (pine resin is common), then generally mixed with solvents and waxes to form the paste used. When it is heated in soldering, the fumes and smoke you get are composed of that resin being vaporized. If you could cool it off, you would then get back the "tar", similar to what is in cigarette smoke. So - I wouldn't advise breathing it, but it probably isn't going to kill you instantly or make you grow a third eye, either. You would have to inhale a lot over a long time to see significant detriments to your health (likely shortness of breath, coughing, congestion - things of that nature - which would clear up over time once you limited your exposure again).

A couple of other things - the stuff called "pitch" or "pitchblend", which was used for sealing wooden ships way-back-when, was typically pine tar (although other woods were used as well), made by burning wood, then condensing the smoke. Road tar is a byproduct of the petroleum industry, made by the cracking of petroleum (basically, heating raw crude until it boils and vaporises, then cooling those gases in a fracturing tower - essentially a really large distillation system - the lower down the tower, the thicker the product, with the tars on the bottom; the next level up is basically diesel and kerosene). There's also tar made from coal (coal tar is used in a variety of medicinal preparations - one of the more common being dandruff shampoos). Finally, the black substance that forms on the inside of meat smokers and barbeques is "tar" from the smoke (from the wood or charcoal) that condenses on the inside surfaces of the cooker.

So - all in all, the smoke from flux (which is made with rosin) shares quite a lot with the smoke from other sources; I wouldn't say its healthy to breathe, but I wouldn't fear it like death, either, unless you happen to be asthmatic, have pneumonia, or other breathing issues, of course...

:)
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

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