Dwayne Reid wrote:

> This sounds interesting - I'm looking forward to hearing your results!  But
> I'm curious: will the calibration change if you use a different transistor
> as the sensor?  I was looking for something that would not require
> re-calibration if the sensor was changed.

> The spot checks I did were within 1 digit of my lab K-type
> thermometers (both recently calibrated) - that was as good as I ever hoped
> to achieve.
>
> The project was originally going to use thermistors but I wanted to try
> something different.  I got it working but then the whole thing got put on
> the shelf - the client had other (higher priority) projects.  But I'll be
> resurrecting it soon.


Is it possble the transistor junction
characteristics will age over time causing
errors with age? How large is the junction
current?
-Roman

PS. this should probably be [EE:] now!

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