<arossdotme>
looks like it's ok to use li-ion charges with li-po
<arossdotme>
so whats the darn vottage to let to dischage to before the cut off point?
<arossdotme>
let it discharge too
<arossdotme>
it's hard to find itfo
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<arossdotme>
looks like lowbat is 3.2v according to adafruit's low batt led on there products
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<DocScrutinizer05>
arossdotme: I'd rather use 3500mV aka 3.5V
<DocScrutinizer05>
LiIon (incl LiPo) chemistry suffers *massively* from deep discharge
<DocScrutinizer05>
3.00V is the ABS MAX deep discharge where you're supposed to dicard the cell safely when ever crossing that line
<DocScrutinizer05>
aiui
<DocScrutinizer05>
anyway >>90% of the available capacity of a LiIon standard chemistry cell are in a discharge voltage range between 4200mV and down to 3550mV
<DocScrutinizer05>
I'd not charge the cell to >4100mV either
<DocScrutinizer05>
those designs that use 4200mV-3200mV or even lower, are made for maximum effect in time of sale, not bothering at all about expected livespan of product / battery. A careully gently managed battery can live >7 years, while those "max perfomance" designs calculate with a battery livespam of < 2 years
<DocScrutinizer05>
oftem < 1 year
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<arossdotme>
DocScrutinizer thx iw ould like max batt life span,
<arossdotme>
the chrager is setup to charge upto 4.19v if i'm not missing out the 3rd digect
<DocScrutinizer05>
then use 3.55 .. 4.1V (dis)charge cycle limits
<arossdotme>
which i realise now the 3rd digect makes a diff when talking about it
<arossdotme>
ok
<arossdotme>
the min vottage in the sys power info is something like 4.7something
<DocScrutinizer05>
4.15 is maybe still ok, 4.2 is pushing it quite a bit
<arossdotme>
ok
<DocScrutinizer05>
4.7 doesn't make sense
<arossdotme>
i'mm ignore that vaule then
<arossdotme>
i'll
<DocScrutinizer05>
4.7 sounds like min USB VBUS voltage
<arossdotme>
my bad
<arossdotme>
its 3475000v
<arossdotme>
it's hardware charged
<arossdotme>
i'm just refering to the sys files the batt monitors use
<arossdotme>
but i now have a better idea of what votage to dischage too before rechage
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<DocScrutinizer05>
3475000µV sounds like a reasonable End of Discharge Voltage
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<arossdotme>
EDV so thats what its called
<arossdotme>
thx
<eintopf>
in german: electronische datenverarbeitung
<eintopf>
s/elec/elek/
<qi-bot>
eintopf meant: "in german: elektronische datenverarbeitung"
<wpwrak>
kristianpaul: not really. yet another vendor-specific architecture, much like avr. why build on this if we can have nice arm-based MCUs, from so many different sources ?
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<kristianpaul>
well, just thinking on the power comsuption could be not as low as the msp430 but interesting
<kristianpaul>
to be honest the only 32 bits mcu i can get here is fro microchip :D
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<eintopf>
I worked with the msp430
<eintopf>
and it was a mess with the toolchain
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<eintopf>
but I heard that ti did some project with redhat to support msp430 to "mainline" gcc
<eintopf>
before it was a mess
<zeiris>
I think msp432 is just an Cortex M4 with TI's modules. That doesn't sound so bad.
<wpwrak>
the idea is good, but they really should have use different words to describe it
<wpwrak>
larsc: no, apparently each device gets its own
<wpwrak>
similar to the unique numbers other manufacturers use
<zeiris>
Would trusting the silicon vendor to discard the random seed immediately after generation+burn be reasonable given that you must trust them to not insert backdoors into the silicon? :)
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<larsc>
even if they'd store it, would still be pretty hard to match it to the hardware