[time-nuts] Ultra low power RTC

Mike Cook michael.cook at sfr.fr
Wed Mar 7 18:33:58 EST 2018


> Le 7 mars 2018 à 11:10, Attila Kinali <attila at kinali.ch> a écrit :
> 
> On Tue, 6 Mar 2018 21:57:32 -0500
> Bob kb8tq <kb8tq at n1k.org> wrote:
> 
>> Assuming you are going to run it off a battery. What’s the self discharge
>> rate on a reasonable battery? 
> 
> With supply currents below 100nA you can assume that you are likely
> to be limited by the self-discharge using coin sized LiMnO2 cells
> (e.g. a CR2032 is specced in the order of 100-300nA self-discharge).
> For the smaller cells, you have to check which one is larger, but
> they are of the same order of magnitude.

This is interesting. When you talk of self discharge, is there any way of harnessing that. Is that what the chip manufactures are doing?

> 
> 
> 				Attila Kinali
> -- 
> It is upon moral qualities that a society is ultimately founded. All 
> the prosperity and technological sophistication in the world is of no 
> use without that foundation.
>                 -- Miss Matheson, The Diamond Age, Neil Stephenson
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