nRF52840 Dongle v1.0.0

External regulated source

The nRF52840 Dongle can also be configured to be supplied from an external regulated 1.8–3.6 V source through the VDD OUT connection point. To enable this, SB2 must be cut and SB1 must be soldered.

CAUTION:
Do not have both SB1 and SB2 connected at the same time as this will damage the nRF52840 SoC.
Figure 1. Configuring 1.8-3.6 V external source
Configuring 1.8-3.6 V external source (SB1 and SB2)