Re: TI-H: Temp sensor failing


[Prev][Next][Index][Thread]

Re: TI-H: Temp sensor failing




html code deosn't work in your sig.  It only makes it a lonk hwne It sees
skljf@hut.net or http://....  Just a freindly reminder.
John Fraser @ Happyware 1997
 Can you live without the EuP
If you want more info contact 
happyware@cyberdude.com
Join the TI Hardware Ring today!  Point to
http://surf.to/happyware




----------
> From: "Richard Piotter" <richfiles1@hotmail.com>
> To: ti-hardware@lists.ticalc.org
> Subject: Re: TI-H: Temp sensor failing
> Date: Tue, 11 Nov 1997 21:52:56 PST
> 
> I'm not sure, but excessive heat while soldering may do the trick. Once 
> I tested a chip to find its range, got it to 294 degrees F!!! I was 
> amazed, but when it got to 92 degrees, it shot down to 32 F (0 C). I 
> believe that if you hold the soldering iron too long, it causes the chip 
> to expand more than it was designed to. It works because the expansion 
> pushes things together, but when it cools, it contracts and messes up. 
> Try it again with a new circuit and just barely touch the soldering iron 
> to heat the chip. They are designed so the case conducts the heat 
> straight to the silicon sensor inside and that means it is extra 
> sensitive to your soldering iron
> 
> >
> >Does anyone know why my temp sensor always reads 0?  I've built two of 
> them
> >now.. but one never reads higher than about 10 or so, and the other 
> only 0.
> >Anyone have any suggestions?
> >
> >
> 
> 
> Richard Piotter
> 
> E-Mail:
> richfiles1@hotmail.com
> richfiles@usa.net
> 
> The Richfiles:
> <A 
>
HREF="http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html">The 
> Richfiles TI Page</A>
> <A HREF="http://www.geocities.com/Area51/Lair/8510/Richfiles.html">The 
> Richfiles Model Building Page</A>
> 
> 
> ______________________________________________________
> Get Your Private, Free Email at http://www.hotmail.com
>