Disabling LD5 to Decrease Power Consumption

[Burnie Barren]

Hello,

I am trying to decrease the power consumption of my board (nRF52 DK) so that I can only see what's consumed in advertising beacon demo. When I measured the current, it gave 1.3 mA which is a few orders larger than I expected. At first I thought it is due to debugging mode, but I believe I had power-on-reseted the board - I simply pushed the reset button while powered on, is there anything I am missing? So now I would like to bypass the leds. I was able to disable the user leds but I could not find the code that initiates LD5. Could you please guide this beginner in this matter?

Thank you for your attention.

Burnie Barren

[Simonr]

Please note that when you measure on the current measurement pins the SB9 should be cut in order to measure the correct power from the onboard nRF52832. See the Measuring current section of the DK user guide if you haven't already. Are you planning on running the entire Development Kit off a piezo harvesting circuit, that does seem somewhat optimistic, as the interface MCU with a debugger among other things isn't really suited for low power applications.

Best regards,

Simon

[Burnie Barren]

Yes I cut SB9, there I connected the multimeter. I actually just wish to activate the chip rather than the whole board, but I cannot see any direct power supply to the chip and thought 'external supply' pins do actually power up the whole board. Isn't it the case?