Re: [misterhouse-users] iButtons for Dummies

[Thomaz G. <tg...@es...>]

How I did it:

I made a waterproof sensor by taking a DS1820 (looks like a plastic 
transistor) and placing it, and a dallop of heat sink compound, inside a 
short piece of brass tubing.  (My local hobby shop provided tubing, along 
with the neatest little tubing cutter...)  I sealed the ends with one of 
those 'hot glue' guns.  The result is waterproof, the response time is fast 
because of the heat sink compound, and will stand normal environmental 
temperatures with no trouble.  The only thing you may have to be concerned 
with is the melting temp of the glue.  Unless you're using it under the hood 
of your car, or some other unfriendly location, the melting temp is not 
likely to be a problem.  Of course, you could always use epoxy...

The above has worked so well that it's become the standard treatment for 
sensors in my system.  I've got a dozen or so in various places.

Maybe this will be useful to someone...

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On Friday 26 January 2001 17:20, you wrote:
> I don't know how water proof the ibuttons are themselves, but there is
> also a version (DS1822 I think) that looks like a small transistor that
> you could encapsulate in silicon or something.  As I recall, in a
> previous post, somebody had talked about taking an 1822 and sealing it
> inside a straw with some silcon and then inserting the sealed end down
> into the water.
>
> -----Original Message-----
> From: Kieran Ames <ka...@op...>
> Date: Thu, 25 Jan 2001 22:46:09 -0500
> Subject: [misterhouse-users] iButtons for Dummies
>
> > 2 questions...
> > 1- Would someone be kind enough to re-post the URL for that Beginners
> > guide to using IButtons? It included parts, photos, etc.
> > 2- Any "iButtons for Dummies" talk about topologies?
> >
> > I'm think about getting started with this. A fish tank thermometer
> > would
> > be my first venture. (It's also about 3 feet from my PC.) But then,
> > where would I go? I can envision quite a wiring mess unless I plan
> > this
> > out right.
> >
> > TIA
> > Kieran
> >
> >
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>
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-- 

Tom Gunn  WD4JQX
tg...@es...


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	 From the shallow end of the gene pool...