detect low voltage in nrf51

[nordicbeginner]

can you tell me how to detect low voltage in nrf51?? how to set lowest threshold??

[ovrebekk]

Hi

You should be able to use the LPCOMP (low power comparator) for this.

You can set the threshold to VDD*N/8, where N is a whole number between 1 and 7. You can also use an external reference voltage, which could be provided by a voltage divider to give you an arbitrary threshold.

Best regards
Torbjørn

[nordicbeginner]

i have one question. which consumes more power adc or comparator??