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Have you actually tried this? Just because the voltage of a PN junction produces a predictable voltage per unit temperature (just taking your word for it here), does not imply you can just substitute that into a previously designed circuit. Having worked in the electronics industry for a long time, I don't think I've ever seen a simple diode used as a temperature measuring device; there's probably a good reason for this. My best guess is that this temperature voltage relationship you mention is either not as straightforward or not as accurate as you imply. More to the point, having worked with the sensor in question I can tell you with certainty that it's a resistance based sensor, not a diode. Substituting a diode is not going to work, unless you are suggesting he backwards engineer the entire circuit, then design and build an adapter circuit for the diode in order to produce the output the EDU is expecting. At that point, $85 starts to look like a pretty good bargain.
posted by 198.84.24...
Posts in this Thread:
- Outside Air Temperature - Calibration Possible?, Bill Homer , Mon, 27 Jul 2015 07:57:38
- I believe no connection to ACC, David Ingram, Tue, 28 Jul 2015 11:53:12
- Thanks for the correction!, David Ingram, Wed, 5 Aug 2015 13:55:43
- Re: EDU pin 18, outside temperature, goes to ACC. n/m, Street, Tue, 4 Aug 2015 03:02:32
- Re: I believe no connection to ACC, TML , Fri, 31 Jul 2015 08:10:41
- Re: Outside Air Temperature - Calibration Possible?, LJS, Tue, 28 Jul 2015 09:59:40
- Re: Outside Air Temperature - Calibration Possible?, BobS, Mon, 27 Jul 2015 11:20:40
- Re: Outside Air Temperature - Calibration Possible?, JerseySaab , Mon, 27 Jul 2015 09:26:12
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