Re: APC Smart-UPS float voltage experiment
so hmm finally the mod will wait, the new batt I found ask for 13.7-13.9V, the ups provide 13.9V so it's in the right range. But I will still do it at the next scheduled downtime
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Re: APC Smart-UPS float voltage experiment
It appear that there is no easy way to change the low voltage setting.
looking at the schematics, I see that on page 3 that IC14 is the charge controller IC, getting it's reference voltage from pin12 from IC20 and compare it from the input of pin 13 that come from a divider from R118/R119.
However, the low voltage is not detected by that IC.
IC10 is an ADC (analog digital converter).
Pin1 is channel0, which is the voltage sense pin. It come from R99/R100.
That value is then multiplied...
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