nRF52840 current measurement

[estatiokvit]

Hi all. I want to measure current consumption on nRF52840 DK (PCA10056).

I have the SB40 cut and the 12 Ohm resistor placed in R90. I measure the voltage on this resistor. The problem is, that measured voltage refers only to the nRF chip, but I want to measure also LEDs and connected shield via GPIO. How to achieve this ?

BR,

Jakub

[Andreas]

Hi,

 

There is no similarly easy way to measure the current across the LEDs. See the HW files, you need to either measure the voltage across the resitors or e.g short SB9 using a resistor and disable U4.

 

Best regards,

Andreas