detect low voltage in nrf51

[nordicbeginner]

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

[Roger Clark]

Do you mean using the event / interrupt system.?

The other method is to use the ADC to measure the supply voltage, as the ADC has an input setting to measure the supply.

[nordicbeginner]

no i don't want to use adc

[Roger Clark]

This question has been answered several times before

Take a look at these questions and the answers

devzone.nordicsemi.com/.../

[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]

can you tell me how to use it??