Hello Matthias,
You would be surprised how many things work amazingly well at 77K. FPGAs
and other digital logic runs just fine, most of analog circuits as well.
Just test things in isolation at first. No other excuse is needed to play
around with liquid nitrogen in the office :)
Indrek
Indrek Rebane, CTO, Hedgehog OÜ
Riia 185A, 51014 Tartu, Estonia
[log in to unmask], www.hedgehog.ee
tel +372 5698 1845, skype teine_rebane
On 24 November 2015 at 18:09, Matthias Mansfeld <
[log in to unmask]> wrote:
> Hello William,
>
> the interesting fact is, there seems to esist a prototype (hand
> wired) around a commercialy available(?) camera module which seems to
> work (for how long? Don't know). Maybe the conditions rumd this
> electronic stuff aren't really so cold and these -196°C are the very
> worst case around the housing. Everything is monted in a steel tube
> with an flage with a window...
>
> Best wishes
> Matthias
>
> On 24 Nov 2015 at 10:59, Brooks, William wrote:
>
> > I haven't seen any electronic parts that are rated to work at those
> temperatures...
> > You may have to get very inventive and do some testing to see just what
> you can get away with...
> > I wouldn't call this 'simple'.
> >
> > :)
> >
> >
> >
> > -----Original Message-----
> > From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
> Matthias Mansfeld
> > Sent: Tuesday, November 24, 2015 7:02 AM
> > To: [log in to unmask]
> > Subject: [DC] Design rules etc. for cold cold cold frozen stuff (-196°C)
> >
> > Hello everybody,
> >
> > I got a request for a quite simple design (flex or rigid, still
> > undefined) containing two dozens THT LEDs, a resistor and a cable.
> >
> > Application is anywhere at -196°C (I hope not immerged in Liqid
> Nitrogen), and currently I don't know further details like temperature
> change rates, number of "cycles".
> >
> > I see possible problems with thermal mismatch (220° difference as worst
> case) together with the severe embrittlement.
> >
> > Any ideas, experiences, advices, application notes, links to special
> design rules etc.? Any help is severely appreciated, as my "designer
> instinct" is maybe enough for normal or hot stuff, but not for this
> application.
> >
> > Many thanks in advance
> > Best wishes
> > Matthias Mansfeld
>
> --
> Matthias Mansfeld Elektronik * Printed Circuit Board Design and
> Assembly
> Neithardtstr. 3, D-85540 Haar, GERMANY
> Phone: +49-89-4620 0937, Fax: +49-89-4620 0938
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>
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