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From: dant@mrloog.LA.TEK.COM (Dan Tilque;1893;92-101;)
Newsgroups: sci.physics,sci.electronics
Subject: Re: Long-Life battery and clock
Message-ID: <4303@teklds.CAE.TEK.COM>
Date: 19 Dec 88 06:40:25 GMT
References: <2826@kitty.UUCP>
Sender: nobody@teklds.CAE.TEK.COM
Reply-To: dant@mrloog.LA.TEK.COM (Dan Tilque)
Organization: Scalp Tonic Interdiction Agency
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Larry Lippman writes:
>
>	The problem, as I see it, is not so much finding a suitable power
>source, but finding an electronic timing and control circuit which will
>work for 100 years.  This is not a trivial task; it is not a trivial
>assumption that say, a CMOS timing circuit will work for 100 years without
>failure.

In a fairly recent electrionics trade mag, one of the columnists was
commenting on a DoD spec which required that a part have a MTBF (Mean Time
Between Failures) of about 77 years.  I think this part was in a field
radio or maybe it was a field radio.  Perhaps the originator could get
together with whatever contractor fulfilled this spec.


---
Dan Tilque	--	dant@twaddl.LA.TEK.COM

 "Computers are useless.  They can only give you answers."
					-- Pablo Picasso