[time-nuts] Ultra low power RTC

[Bob kb8tq]

Hi

> On Mar 7, 2018, at 6:33 PM, Mike Cook <michael.cook at sfr.fr> wrote:
> 
> 
>> 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?

Self discharge = current flowing through the internal elements of the cell (plus 
other long term degradation effects).

Bob

> 
>> 
>> 
>> 				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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