nRF52840 Preview DK v0.9.x

Preparing the development kit board

To measure current, you must first prepare the board.

The suggested configurations actually split the power domains for the nRF52840 SoC and the rest of the board.

Figure 1. Prepare the development kit board for current measurements
Prepare the nRF52840 Preview Development Kit board for current measurement.
  1. Cut the PCB track shorting solder bridge SB40 to put P22 in series with the load.
  2. To restore normal kit function after measurement, solder SB9 or apply a jumper on P22
  3. To reprogram the nRF52840 SoC while the board is prepared for current measurements, remove measurement devices from P22, and then connect the USB cable.