https://devzone.nordicsemi.com/f/nordic-q-a/20647/using-external-power-on-nrf52dkI connected up +5v to the external power pins of the nRF52dk. I see +5 at TP14. When I set the power switch to &#39;on&#39;, the board does not boot. Is there something else I should be doing?en-USTelligent Community 13Tue, 21 Mar 2017 08:39:37 GMThttps://devzone.nordicsemi.com/thread/80510?ContentTypeID=1Tue, 21 Mar 2017 08:39:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3304d695-813a-4bb8-8129-af1f05a58661Sigurd<p>Hi,</p> <p>It is only the 5V from the USB that is regulated down to 3.3 V through an on-board voltage regulator. The battery and external power supply are not regulated. You can therefore not use 5V on the external power pins.</p> <p>Allowed voltage level on external supply pins are 1.7 V - 3.6 V.</p> <p>More information <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/development/nrf52_dev_kit/hw_power_sup.html?cp=2_2_2_5_2">here</a>.</p><div style="clear:both;"></div>