07-23-2016, 05:54 PM
(07-23-2016, 05:46 PM)DonFL Wrote:(07-23-2016, 05:35 PM)@lex Wrote:(07-23-2016, 05:33 PM)DonFL Wrote:(07-23-2016, 05:25 PM)@lex Wrote: I mean two CR2032 (3v), the left coin (near the cable) (+) facing up, the second CR2032 (3v) (-) facing up.
That puts them in series, giving you 6V rather than 3 as we are confident is correct. If you look at the scehmatic, there doesn't appear to be any on-board regulation for the RTC, so you're feeding that pin on the PMIC with 6V, spec appears to be 3V max.
I would tend to agree with xalius that the holder is mis-marked.
I mesured at the conector, it is 2.85v, so it is not feeding with 6v.
When you measure the output of the battery holder, not connected to the board, what do you see? 6V?
And then when you plug it in, where are you taking your measurement?
Q: When you measure the output of the battery holder, not connected to the board, what do you see? 6V?
A: 2.85v
Q: And then when you plug it in, where are you taking your measurement?
A: Did not take, just made sure that i did not have anything higher than 3v at the cable end, never seen anything like this on any SBC, but the only thing i can think it is that will last longer.
There seems to be a little circuitry inside this Battery holder that drops the voltage, if you insert only ONE battery you get ~1.8v or less.
