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]

Hi

Have you read and done the necessary steps described in Preparing the development kit (section 6.7.1) in the DK user guide? If powered by the external power supply you should short solder bridge SB12 to avoid the voltage drop as well while measuring current. Cutting SB29 will indeed just disable the power for the interface MCU, and will only allow for the board to be powered by the External supply (P21).

Yes, the external supply pins will power the whole board, but the measurement pins will only measure the current drawn from the nRF52832. 

Best regards,

Simon