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
Internet: http://www.mansfeld-elektronik.de
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