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+---- Thread: Battery temp pin? (/showthread.php?tid=2938)
Battery temp pin? - SvdSinner - 12-13-2016
I will be building a custom enclosure and battery for my Pine. I'd like to use the battery temperature pin. Is there a schematic of what it expects? (I'm sure it must be thermistor based, but what thermistor and wired how?) I'm guessing the expected output of that pin is hardwired into the board, or can it be configured via software?
RE: Battery temp pin? - MarkHaysHarris777 - 12-13-2016
(12-13-2016, 11:25 AM)SvdSinner Wrote: I will be building a custom enclosure and battery for my Pine. I'd like to use the battery temperature pin. Is there a schematic of what it expects? (I'm sure it must be thermistor based, but what thermistor and wired how?) I'm guessing the expected output of that pin is hardwired into the board, or can it be configured via software?
The vbatt is expecting a three wire battery . Red goes to (+) black ground goes to ( - ) and the center pin goes to yellow -- the thermistor.
If you have a two wire system that is ok... but the center pin must be channeled via 10k ohm resistor to ground; that is, you must connect a 10k ohm resistor from the center pin directly to ground if you expect the battery to be charged.
Yes, schematics are provided on the wiki. No, the center pin cannot be configured via software; however, if one were clever enough the registers of the PMIC might be changed to accomodate other parameters -- but those are undocumented.
The best is to uses the standard three wire 1800 mah lipo system; as provided on the pine store.