how to use but 3.3v and 1.8v from the internal regulated supply

[Karthik p]

Hi

I am facing this issue were I need but 1v8 and 3v3 at the same time to power PPG sensor and it's LEDs

so if there any example code for this approach pls share.

Best regards 

Karthik 

[Turbo J]

The NRF52840 has only one VDD rail for the GPIOs, thus you have to decide on which voltage to run the chip.

The other hardware has to be put behind some level shifters.

Its too early for source code - you need a schematic first.