[time-nuts] uC ADC resolution (was: Poor man's oven)
Bob kb8tq
kb8tq at n1k.org
Thu Jun 8 10:57:41 UTC 2017
Hi
> On Jun 8, 2017, at 3:41 AM, Hal Murray <hmurray at megapathdsl.net> wrote:
>
>
> attila at kinali.ch said:
>> Keep in mind that you will need a good voltage reference as well to reach
>> anything close to 12bit. Your LDO is _not_ a good voltage reference
>> (depending on type and load/source conditions they vary eaily by 1-2%... not
>> to talk about their noise)
>
> That applies when using a thermocouple. If using a bridge (or just a
> divider), you can use the same voltage that powers the bridge as the
> reference for the ADC and any drift cancels out.
If you go utterly crazy and get into the $1,000 and up “traceable standard”
thermistors or RTD’s just about everything matters :)
Bob
>
>
> --
> These are my opinions. I hate spam.
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the Time-nuts_lists.febo.com
mailing list