https://devzone.nordicsemi.com/f/nordic-q-a/7214/switch-completly-off-interface-icHi. I&#39;m using the nRF51 DK (PCA10028) to mesure the curent consuption of my system. I&#39;m using an external DCDC witch is a part of my system, so I want to mesure the current BEFORE the DCDC. The problem is, as the interface IC drawning some currenten-USTelligent Community 13Tue, 26 May 2015 07:15:45 GMThttps://devzone.nordicsemi.com/thread/25485?ContentTypeID=1Tue, 26 May 2015 07:15:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9013bf45-2a32-4de8-8497-81e07d403ab0Remi<p>Solved!</p> <p>Use the nRF51 DK (PCA10028).</p> <ul> <li> <p>Cut SB9 and remove R6 if present (see nRF current mesurement section of DK user guide).</p> </li> <li> <p>Plug USB cable and switch the board on.</p> </li> </ul> <p>Now you can power the nRF with the upper pin of p22 (nRF current mesurment pin). The current mesured is only the current consumed by the nRF.</p> <p>The interface MCU will be powered by the USB cable.</p> <p>You can also plug other peripherals to the p22 pin, to mesure your whole system&#39;s current consuption.</p><div style="clear:both;"></div>