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February 27, 2013
about 3 years ago
The trace between pull-up resistor R14 and VBATT goes next to JP7 which is the external power switch. I think that by cutting pull-up resistor’s trace between JP7 and U1 and then connecting the trace to JP7 (to hole which is closer to USB connecter) it should be possible to get both zero power consumption when Fio is switched off and battery level monitoring functionality.
I have 2 fio V3 boards, current consumption is roughly 2mA when power switch is off. E.g. it is really unusable with 110mAh battery :(
With original FIO the current consumption is 0.0uA when power switch is off.
Member #401697: have you tried to cut the trace?
Sparkfun: I would like to both measure the battery when device is powered and have long battery life when not powered. I guess that it is not possible? Or can some wiring be done with board to get voltage divider after power switch?
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